Text

Forwards Preliminary Metallurgical Evaluation of Failed Crankshaft from Diesel Generator 102
	ML20080P122
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	10/03/1983
From:	Earley A; HUNTON & WILLIAMS, LONG ISLAND LIGHTING CO.
To:	Brenner L, Ferguson G, Morris P; Atomic Safety and Licensing Board Panel
References
	NUDOCS 8310060300
	Download: ML20080P122 (15)
	v • d • e

-

DC:KET Nur,ggy .

ROD. & UTIL FAC., , L[

,* w HUNTON & WILLI kht 707 East MAm Sintet P. o. Box 1535 o e & T SUtLD.M.

a e. Com eos Rzcamown, Vrnorms.^M UBT -5 M0 :31 p .'o.so=~m~se"aso

- us -

RAL 4w, monta camoumA a7 eon wasu.wovow, p. c. aoose h BM - MB - 8200 CO cas.es7' roa.aas.eeso nam vi.o.....A..vo. .

. OFFICE OF SECRtIA 00CKETmG & SEi<Vd.I " ' ' = - 24566.3 0$,*si".,'*.*I...Aaa... 2 RANCH co ea....o.

October 3, 1983 '" " ' * ' '* * " 8 3 61 Lawrence Brenner, Esq. Dr. Peter A. Morris Administrative Judge Administrative Judge Atomic Safety and Licensing Atomic Safety and Licensing Board Board U.S. Nuclear Regulatory U.S. Nuclear Regulatory Commission Commission Washington, D.C. 20555 Washington, D.C. 20555 Dr. George A. Ferguson Administrative Judge Atomic Safety and Licensing Board School of Engineering Howard University 2300 6th Street, N.W.

Washington, D.C. 20059

( Diesel Generator 102 Crankshcft

[

Dear Judges Brenner,

Morris and Ferguson:

For your information, enclosed is a copy of the

" Preliminary Metallurgical Evaluation of Failed Crankshaft From DG 102" produced for LILCO by Failure Analysis Associates.

Sincerely, f

1 A thony F Ea ey, Jr.

. 221/765 Enclosure cc: All Parties l

8310060300 831003 PDR ADOCK 05000322 O PDR

l> .

l l, '

-l -

.g 1

1 i PRELIMIftARY PETALLURGiCAL EVALUATION OF FAILED CRANXSl! AFT FRCf1 DG102

, PREL]NIC;tY I!:FC:U4ATIO2 EFIRATED IN (XTED'PLATIC3 CF LITIGATICil i

l lI 9.Rit*JtY

, The fracture occurred by fatigue. The fatigue fracture originated at a i machining mark on the machined surfaca of the fillet radius.

The microstructure, hardness, tensile properties, che:nical cceposition, and forging flow pattern were normal. No metallurgical anomalies or substand-ard characteristics have been found to date.

ll INinCOUCTICd

, A metallurgical failure analysis is being performed on the broken crank-l 1 shaft from the emergency diesel generator (DG102) that failed on August 12, i 1983 at the Shoreham Nuclear Power Station. The analysis is intended to I assess the nature of the fracture and to identify any metallurgical character-

{ istics of the crankshaft that may have influenced the fracture process. This i j report describes the work done to-date. A formal, detailed metallurgical l account will be included in the DG102 FaiTure Cause Report.

l Prior to any laboratory testing, a plan of action was agreed upon by j representatives of Long Island Lighting Company, Stone a Webster Engineering

{ Corporation. Transamrica Delaval, Inc., and Failure Analysis Associates. The i protocol outlining the work to be carried out is attached. This includes i schemat" s showing cuts that were subsequently made and identification of the i cut pieces by code letter.

The failed crankshaft ' had fractured into two pieces at the crank pin j journal of cylinder number 7. The fracture occurred mostly through the web l

l l

0

i'

} connecting the number 7 crank pin journal to the number 9 main bearing jour-nal. The section examined was saw-cut from the crankshaft; cuts were made through the nurAer 8 and 9 main bearing journals. This two piece section, containing the fracture, was shipped to Palo Alto. California for laboratory examination. Both pieces of the fractured section were examined visually, then the metallurgical fatture analysis was performed on the piece nearest to i the number 9 main bearing. The other, mating fracture surface has been pre-i served for any additional examination that may become appropriate in the future.

Residual stress measuremnts by x-ray diffraction are in progress, but

results from these tests are not yet available. FaAA originally proposed

! measuring residual stresses in the machined fillet radius. In the Septem-ber 9, 1983 meso, we proposed to use strain gage and hole-drilling or trepanning techniques. We were unable to perform either technique due to the crankshaft geometry and fillet radius curvature. Instead, near-surface t residual stresses will be measured using an x-ray diffraction and electro-chemical raachining technique. The final OG102 Failure Cause Report will include the x-ray residual stress measurements.

,t VISUAL INSPECTION The fracture surface exhibited an obvious, unmistakable fatigue crack pat-tern. Concentric beach marks showed that the fatigue crack started at the i! surface of the machined fillet radius where the crank pin journal blends into i the web. The fatigue crack had progressed through the thickness of the web, i

and it extended over more taan one-third of the web cross section when final

! separation occurred.

i i

i A thin layer of aluminum had been deposited over much of both mting i fracture surfaces. The crank pin journal bearing was the source of this alu-y minum. Small fragments of the damaged bearing appear te have been carried by S

lubricating oil in between the mating fracture surfaces where they were depos-ited by rubbing contact between the fracture surfaces.

The appearance of both fracture surfaces was documented photographically.

')

h .

=b h :

id

'4

l ..

j SCJCIKS ELECTM MIC"0 SCOPY The microscopic features of the fracture surface (Piece F, see attachment) were examined by scanning electron microscopy (SEM) after careful stripping

with cellulose acetate tape to remove the aluminum deposited on the frac-ture. The rubbing contact betwen the mating fracture surfaces had eliminated any possibility of identifying fatigue striations near the origin. All of the

fatigue fracture surface examined had been rubbed, a characteristic of many i fatigue fractures, and it had many irregular, short scratch marks, probably

,i caused by debris from the bearing, i

A unique point of origin of the fatigue crack was found at the edge of

the fracture surface at the surface of the machined fillet radius. The origin j! was indicated by the tear lino pattern on the fracture surface Wiich showed l; that the crack started in a cachining cark that is deeper than adjacent machining marks. The machined surface of the fillet was also examined by SEM to show the machining mark at the point of fatigue crack origin as well as the

machined surface nearby.

! The details made apparent by SEM on the fracture surface and on the

machined surface of the fillet groove were photographed.

1 RT. ILLos!!MHY After the SEM examination was completed and documented photographically, a the sample containing the origin of the fracture was diamond-sawed to expose a i cross section through the point of origin. This specimen was polished and

etched to reveal the microstructure of the steel at the crack origin and sur-

rounding areas, j The microstructure consists of pearlite and ferrite in approximately 4 equal proportions. From the pearlite / ferrite microstructure, the prior aus-

} tenite grain size was seen to vary from ASTM 4 to ASTM 8. A few nonmetallic q inclusions were found, a normal expectation. The few fine inclusions to be u seen did not warrant the statistical sampling required to give an ASTM inclu-d sion rating to this clean steel.

i l

~

> i.- .6 n. ) .m,n.e,..,s.... ..m ..w,

..a m

.i ~ .'

n -

The microstructure at the point of crack origin was the same as else-where. There was nothing unusual or noteworthy; e.g., we observed no large j inclusion in the microstructure at the origin. The polished cross section did )

show the same machining mark which had been previously identified by SEM as I the fatigue crack origin. The pearlite / ferrite microstructure at the surface l p adjccent to the machining mark appeared locally disturbed showing that the l

,i steel had been deformed slightly when the machining mark was sede.

t .

Photomicrographs were taken to depict the microstructure in the vicinity of the fracture origin and elsewhere.

1 j TENSILE TESTS Mechanical properties of the forged crank were determined for transverse, longitudinal, and radial orientations. Strength and ductility para.mters were determined following the ASTM A370 specification; the measured properties caet

or exceed those set forth by the Aas Grade 3 specification. A sumary of the mechanical test results is presented in Table 1.

l

QB1ICAL /"ALYSES Material from Section D (see attachment) was submitted for standard chemi-cal analyses. Except for the carbon and sulfur, which were determined by a t- combustion gas analysis method, the chemical analyses were obtained by an inductively-coupled plasma technique. These results are given in Table 2.

Comparison of these chemistry results with the mill chemistry shows that the a steel meets the ASTM A235-67 Class E original specifications.

i I

l1l w -

TME 1 1

1 Summary of Tensile Tests Specimen Yield Ultimate Reduction j Number Stress Strength Eloncation in Area (ksi) (ksi) (5) (%)

, Upper I.ower j R1 46.6 45.0 89.0 25.4 42.0 R2 45.3 44.9 89.4 30.0 45.1 T1 47.1 45.9 87.6 37.1 49.1

'T2 46.9 46.9 88.2 39.0 47.6 1.1 47.3 45.9 89.5 25.1 35.3 L2 47.4 44.8 89.1 23.0 30.6 t

l?

is n

F

5-

'~ - - .

TABLE 2 Chemical Analysis

of Shoreham Crankshaft

, Ellwood City ASTM A235-1st Piece 2nd Piece Mill Chemistry 67 Class E C 0.47 -

0.47- 0.4-0.47 Mn 0.6 0.65 0.83 0.9 max i

j Si 0.12 0.12 0.18 -

5 0.014 -

0.010 0.05 ex j P 0.01 0.01 0.006 0.05 max Cr 0.30 0.39 - -

e Ni 0.054 0.055 - -

Mo 0.03 0.03 - -

V 0.04 0.04 - -

Cu 0.04 0.04 - -

A1 0.004 0.004 - -

i Ti -

0.03 - -

All elements are reported in weight percent.

4 I

B f

I

! I l

l a

l $

j t

l 1 t

, . wa s -. - _- -

MACROETD1 /T.M.YSIS Slabs (A1A, AIB, and AIC) having radial, longitudinal, and transverse cross sections were re:::oved frca section A. Macroetching was perfonned using hot hydrochloric acid; we used this procedure to reveal forging flow lines and

. possible macrosegregation. These sections exhibited smooth forging contours with no evidence of macrosecpic ingot segregation.

HARDNSS ESTIai

Both macro- and micro-hardness tests were performed on various metallurgi-cal cross sections. Bulk hardnesses, as measured on the Rockwell a scale, j ranged between 80 and 89 HRB; the average hardness value was 85 GB. In order i to obtain hardness measurements immediately adjacent to the point of fatigue fracture origin and very near to the c: :chined surface of the fillet radius, Knoop microhardness traverses were made parallel and perpendicular to the machined fillet surface. In both cases the average hardness was approximately i 94 HRB; the individual readings ranged between 83 and 100 HRB. Both the bulk and microhardness values reflect the metallurgical soundness of the forging.

These hardness values are in the range typically observed in forgings of this I type.

e i .

l '

k T l I

s.

M :n nr - - 3

l . . #.. . U. j .....

.2. , ....N. . . *. S....J.

.O.

. ~ . . .....p%..,W. . , . .x,a..s.- .g.,: , %. . ; ,:,. .. NM:. :.e .:. w.> ....% .\. .....,: .,..< *w. * **+ , . . - . ~ .,. A.. K.. .. .m.i.w. .

. . .w ..

.. . .. .. a.. ,

. ,5 . , M;.: :' . .,. .,.

- . ' . ... .\. .: .v. .., .':<. .u ..e-.

.. . .. . .. ... r..a

....:.q.

a. .J. s. .in,. . . a . :4.

4.e_ s..n?..w.w.

. . 2. . . ._. i.

o.

... ~ ..-.u.....

a.

n. ..p. :..g.

..,. W.

.~.

......r. ...a.. ... . . . . .,..r.-,e.,...

. .. . + ...

.. -4~4 . c..a. .

.,. .. . .... ..w.... .

.i,..., ... . .. .r. , . . , . . . . ... m. .n. . # ,.. . ...s...... . . . .. ..

. . . >- , . . . r . , ...

r. . . . o , c .. - ...

.,m y . e.. .. . .

e -. .

..r.: . "n . . % . . w . ' r.

..,...:-..,... t. -., c:

. . ,~ . , -

w 1 ,. .

. m wv

.t... . .. u- 4...

. .g mr .3. w.. . w. ..r. ,. 3.*.-- ,.

t

i ..-. w.'.

. '. . .: t.' y .-- >.,..w- N.%.

s-

. .: ? .: ;:g p.7 . . .

n;. 'N:.

s.

. . . s--%. T, .~

.;..s. . *: ..

c..~. . ...'? ~. v. m ~ .., -

, . m :. -

..e... ..n.;. . . . -+. .:.t..,.- . ,.~n-c........u...,+m.. .......;...?a.

. . .. . ; .w, .a. .... w <. ...

- s,

..v...

~.

. . + .

t > . ..

o,

. . . . . ....w..,. ... . .

~.. A. .- . ..t.f.

r re. ., . . .N- - ,

. +. , < *. .. .?.,,..:.... G * .na n .

..- !,n ..,-f f;.

~... .e . . . .'

...t -

s . m , f.L . ' '-

t. . . . . % . .-'. , . :.f,i., . .:,' ,:s* < ' ... . . . . .;... .:,w,.,Na.

~- : '.;b.. y. . Q. 4P:..* t. .. p r*' r.'r.2

. .y ', .-

. -Q . .

.<%... n . ... . .. w et . ,.n.--

. . . .y..e. . .w..~..v

. . . 2, y ,.-J. ...w -

. .x. ... e.n

,r. j.s s . s. g

- .9.N....

e. . ... ., .y a. .w ..r. .A. . e2- ....T*..

. .f ...p.. . . . .-.-.. .p-.~.

~. :. .s..~. , we.3 e,+.a...-.

. . .<.a. . ...ra.r ;. .. .a

. - ~ . . . a

,a.,n.

. . [u .n.. . . . .. .

w +., . . . . - ...m e. :< . ...o -. s... a....- ..

W.

.. - , .,... -.e.-- . . S.** .. .-

.....,...s..+.4v!.~.. * ..J. .Q. s.v

. .n......... '

f. s..--v.~ w.. s. . ] :!.G,J..u i ,., .

s :4., ... a....p.- -.s .s's.. Lo ~

~ \.

...,'.s

. w . ,

a a. .. . %

. ..o. mssvv.e ~o . . .... ..

.* . x. . . ., c -~or- .. . - - . + s. -' .1 * .m t : - .* . w .+. . <.~_.*z- >-

.-. . \..c-._, w o. 1- - *~ . *g

.,.i,.'...

..-~~g .. . s. .... .; i. .s . : gy. .

...,,H,.

. . . . . . . . w, .

.. w. ..

. . . .. ._..,. .. . .o.........v..

..... 5,r.7.~.

.....k..-

1

. . . , .: =.i .

. :. % .e.

S=

~

.,..sw ;; ,. t.L -w -a ..v. .t e- .h, .-! a. .

y r~ .

e.e.

c x ' .n

.s .e.

, ' : =.

s . : . .

...x.

-'..A ...: ---

I

. . . n

. . . q ..e<..-..

.-4. ,It . ...

W.. .. v

. . x;~,,,* c! w.,.':~n,

')u., , *

., .. . . . .; :. . L ...s w. .,s:

'.% M,.t .: . ; . %.w _ : ;. ~.~. .',:. , , y. :. . . . . . , .

" g.j, .- 7 .. %. . . W. . . s. , %. ,.%

.e.... . - . .

1 . . ..

.:.A. . ,3. . . . . , . . ..,...s..~2

.1 . :p

.a. ,.. ~ ,, p. . . .

. ' 4 .. r. . .

3,. <. + p. wen. .,. . . . . ;

.,,.,.;- . . . ,.,n:: >

s.. . j

.,...,......n..n,w.~......

!<..... .M -.;.,

. .. ....z.... . .....m.a.

2:..,,

.. . . . ~ . .. .

.n . .v i:. .w ] a.

a: g. o

.. . . . e.

,.9., w . . . .

... ... ~ .s s

~

- ,e . ... .. , . .. .. .

.:.'.,.,.,...,.,,,e

a. .::u. .

. . ?. e. . n. , . , , . . . - . q .

xv.... . ..,. ",> H r.L* % .. v .. n .s. s Ag. o@v ,., .- -

<a*.

t l

,y- *a.r ?. a :;- ..

A. . ;;.

-} V e

%S, .... ; 1. ' < ~ t<

' ' . . . a , y. ,. ; g. rc c .' y.g\. s 3.

so^.... .-

. g. r . . ? y~ y..p.....

t\

.e-

.q.

'v' * ...

2 .

r.

' 'd; .,p,

.y 4, . . .

J . g, j . , . ,< . 9.c . p. _ ..G, e w. .,:- 4

. :.qg

. . . . . ~ .a tw.S.*#p. W v,m.p(7 .

. . . . . ...,o...

. .. - ..!. 5 .J ..

..,.1.,. L.. .s., . ., . . ...

e. .. .... .. ..

.t..., d 4 .. -

,. , 4 , ./* .'%., , .... .

, ,..,7. ";.-[). , v. ,.< .n.. . . /.m . e..

,.e

...*r.

.3 , ,,) :

( ..

.,.e..,..

s.. . . .

m ...

. -- - . - .m. s-- f,.rJ ~ <r.s '.*' t a".7. l' ,ts. , A. p .,

, . ,.f..a

. , ,., . m..m.,.,,,.

, , . .C. ;1,eL__ i .

. . . A. .

_u. ,. .

- + - - . ~.

. - v. .

, s., . .

-: m. . .. : . . , .

. . , . .,. * .a.y.m. t . . . . ' . .

,.,w.

q-n.

g=

. .. .. .v. a... - . . , m, . ... +. . e s. . --- .

o.e..,'*.. z.. . . a,.a. .-? e.e. . %,.~ sv . . , . .s

...s., .* .

....s > . .. g

. , ; .. . . .v..... - n. f. . s

. . . . . s. .

.s . t. . .

. .. . . . a.

. -:. r.. :..*- -

=

. w e. ~,

.e Vs .

. . . . .u.

. ... a 5 .... n... . m.. .

.-.. . .w.v- ....v , .

4, .. . .

. . %.n .. J . % ..%.~. : .

L

1. _ .. *

. .,;..,a,..

.% . k >.w 't. *: .:4.@is

.m.a . n i.;.d'.

a-.m.. .. - .r.5;. .l..'J .C.8 .* ; - .

e-

. c .4 . .

a . .J.., .. . . . . . .

. ...w.,.. .

,....uo . .

... * . .,s..g. -...

'.. . e,t...;..y sv. .

.e .

4 .

. + . ....~ .. ... - . . - .. .

.. e. . .,-. . . , .

. .g... ~

... , r . . ..u.g.a d.l~8

. . s' -. .. -.*:..a... . .. . ., .v. l % .u , -

..-..w .. . .. .. ... .. ,.. .

..:.. . .. . -> p . : ., ,

......,.W._o...... ..

.. .. .. . . . , . o . . ,

..e..,".

C J ... .. . .; .- G .. t "

w- ,. a. . .. . .. ..

N ~

~

,G; .* Al. % ~ - - '~ ' . .. % .'- -

f . . ' . . = .. ;e &l?.Q. ;&. ,...-~f . . '

?. ,,,.z _ . .Q s.. v, b . .-, .[*. .w * '.

. ::'. ff ' -

.C 1 .

~ **

g 4, _ s .

4

..';: .. -O .nj. . y: ~'.=-

..:..' r p.. 's.:.* H. D . ._

....1

.\ m.

t. $,_ .

,, ;_ y . __.- _- _-

.i ... T.4

, 9-A- e. , . ,.. i .

. . s.. - - . .. . ... ..,,

'* d . . 1r

.. . - . t j ,. ..

... . .w.

o . ..,....,........a.c2. . ..

. . . .,. .. . . . .. . ..v .. . . .

i. m., . ,..] o. . .. . .. .. ..

,.......~- . a .., . , .. . . . :. . ...+s..t.,,,.,.,,r.,..

t . . . ...e. .....- .. .:.: p

,... a y. . . ..f.........

.. m. .

. x. . . . , .

,. . . .. . .... . . . .. ,. . . . , . . . .. . g - ,,. . ,.

w .., y. s . , .f..,

... . ...m ; .

.m ,

. . .,. ..am- ,r y .w,

.. -.-- ...- .. preg

- . . . ew.

~ y... ,#

.,1 ..

a..

r ,,.;. s . .u. ..

,.,, ..m yv, ;. .: - r ,,.,. ... ..... . .

j . . 7,, .e . f -- gg . ,

.f-(- . . .

is6 . .; e.r.,e. t . ,% s. . A.,g.,7.e ,J.>-.e.,.ns.,. . f._m ,,,,/ e. y W g,g. p,,a 9,.oe.* ., ,,i p .,

4 j . -. e.,. :.< . s,r. -.g e.,... ..;. . . .. .

g% >, ,. :. c t o 4. . * . , , ..

p.-r.4 wa s. ,c.<

%g + r + : :.m ,. m : . z

.3 .

n

.i..,....M*r

.*s . .

% rrvi;; ,h .e+,$ . 4.: ~. . % .. Q., 4 v y.K-v a . y*y.a +....

i

. L $: - 4. i ; . - ~: m %v. -.1: - d -:.,~.G.

. M ;- .

a no n:. y : % e; ka. M. .-lc.y.e.. %.-....- '!. *m;%.

c - - .- .-

;. ..a.e. W. ,...

~ %: . ..i.. ....r .. ,o.w; w .-.

.g~ ,e- .~ --. :, .p,-..+an

- m+ ...:3

,e .-o +s &. ,r.%. .m ."..

. .e . -.

.. .;, . as , , y . . ,

. .. . :.. :q. .

ra.w.e: -.c.... . , , . . n . , .e . r. . . . ,

-w . . . . . .

r,- n ,p.....,7,e. .v

. , ., : :.e..,.,.

. y . p .-

.,n 3

m.n .,,. .

i...e,m.,. .-

,. s . . .- . .j..h.:.

.. . - m, .~..o.,., .w

,.,.r.,

. g.. p..,m . o . . n. . e.....,,

. , .. i. . .

o. . . ."'.

. .. r. f.y. . . .

is . N, ':

W.- .< *

-:%*- I. . ?

f %+ . . , ,4.. t. 'M. .. h_ .i..a b . ,

r

. .-.. . ..%.y .W.%. #. . .,.-~g, r~-4..".J,C, w . %. > . ....,,,y, +

.".Uv*. .<- i

., ~ (.'e ,,M.,#D. i-P, .#-2. M.. M. :.' W ...v, .. .. ... ..:

l '

.%.* . .*.q*.r%.~.f.i.'='N. \ ;* . w .

=. ;:~ 4. a. p -. . . ... : 7: o, ** i.. - .% .. . .i . .

R% . - m. ~w.his.f.m.

'2m r- -

-c.w. W. . -=% =&-

. . . . . s. - z..,.

%'.' W.,,. r - *- = .,.:L. ,.*:;

.g

-*" ~ '.' '.A,, . ' * *'. * -

.e P o.. * -...e.. .: -* ' . . . * --

s* . .

a*. .%m. > s.- . m 1-- w. ...e.,..<.'-=x. <. .$: = m. . .s %. . . .Y. w m.,'ps.s,./ . .g.. . - . . . .

- r'~'.: .'. '.*~.'a-~:- ~- -c h - n- .:

t ,

.Y.

s... s..W:f,e,u,.A.,o ag.p. .

. ...,.., x. s. . . t ..

m. w..

.m,%m*.'~' * '...

s, .... a,e 2 m. . . .

,.a. - ..

. .,,. .;. n. .,. : *. .

. .:*. t.4~k. *. . m, w> M. v.,.pte , , . .- . -. . s .- .,. . .&. . <,q.. . .* p . . .* .. :

.a..u s. , ..ana.h w . ~w .

r,..a.. .a

. - . m'

" . .v:::,73:: . v%..

. . s . .. L ;.;*'. :.; .'.

$.n.4 .%?.4 t v ,. e.v.'%s .. w..c . . . . =.~~*e'.N:

M. .m. 4 n s*w,cc.

-: v.wnn..

w

.u.,.;

. p 6:<w-s.;**w :,zz ,; q.. * % . ,

w. .

!r.v:;..e.. &%.

..m . -

s ,.m.

, M: w -.u ;.. . .. s:,, ,,,c

,s..:

.,, e .**

4,. . ., . . ; .; - . . , , , r.%,'

- y c -++ v w.. .

n o --:. . v... . 4- .. w..~.,. ,.;... c_y.o.. .. _ gm._c,d=.s.%. m. - s.a, . . W.+. . .. . ~ s .v.v< w.., ,x. gJ.

- . .:... .. .: n.. r.,. . . . % . .. . .. . . -

~.,.:t.g<* ..

s. A. n. e. 4

. . . . . 4..e*.

. . . .:... . s.4f. myM. . ~.. ,-, ,..: c 3 CSWE M25. 1Wd%3". M 5W5 M MG5% Mk%. . .V.<.W.q: $o % '.AM N..,:.7;4,&y:'

4. *. ,*M $ G,4-~.,.M v

. . n, 5:.mini..~:e,.tcwq.,.*n.PMJ.Q.,y.g m- v.~.-

...,s. ...u ... ~

.wJL>

.>.m. e.'.',.

.. u

ytt . .

. . s .Wui Wd.-=' M.;. 7.s: ~.- .-.

1, -

a d '<//. /,Jes%s.,b-WM. e ..5ca .* . .N*.0 @. :. . -

WT" - Q , 43 /

4.. .../. . /r. f.,y, ,..-g . *

,c d.q' > w : w ,v.,v- m*v ~..y.~.=n y - , e

-s 7, >.... . . ...a. ~~H . $-s . .

s9 ,,,,,,. , ,t .. ,. . 6g g

. W.,,;c.., x.t. -. x...::,..:

. . . ...M...-

z

..,e n

.gg .c. .+ .,

.V T f .V

. 4~. .

,.*t .

.n..q. J.:..a.* .

. , % & .j. w n..v. ,t .~ s. w p. .c/ s /.-f.,,..l v .

,.,b< r-;.z..ct 3.4 g . .e.

d. ...P.* *- .

...w.e. .'.*4,r",e.w.

0..ws.t w. ,"Q.s . < -

~.q:p:. :,.. A.. 4... . .q.ap.&G. . . .

p-p f .g >. .

4 .;s w3:. - >**.4 :.wM. .-9.c. . .L r 5-.v.i~m.4

.).

ev4*:: r *.. * * . *. E.f.:c.rG=>W.g *. '8 f *y s O s * .. ...

c. R :.s c . .,.h N [ [.kf. ~ . . ..ey.. [ 'fr . * ,$ h , ,, M. , . - . . .. .. ,,. , . p. .,

c.'k. , . f.

+* 6 .,.-

_. . m- . .~.

.. - .n.

.. m. .c .~.s.

.. r. w. ..,n.. ,.:,.2:. ^

. .~

u. _ . ....

. '*:.n .

..' ;.. ,.. . v.

' * . ~.. ., .r .* ...t..n .-

. &.W y V- ***t. *=.. - '-.%.',.* '

- - t?^***. w.s,4'* . .%~.O~L # .\

e i.C',e.. 1 . .

'. w..L.C \.ui. m..%*W cm.Z:"**) .'v. . . .r's .. n::. .. . 't.W"*.%u m ' M ra . *Wn.W +.o*s.

, .t.f* N. ..*c. .i.~,..y f.. . _W. w

. 4 ,. t.*

e . * . .4-- .w Ag . .x.' .y.,_.a

t % . 2 . ..-. *.

. . .....r.[t's '

.w *V. -

'% y.

j, e Og O

J (fas a uc. $-Tw s m c.M Ssm J i '

l

/

\.

y / /

// /

i / :, .

I-t

,/s tf

\

TS.ARS s/fMSd., Ibt

W m

m .

! ' j'g .

1 11 :

N]

iJ L

! \ ao~ s ea, -~

3 i XXN.- .

N m" f/slvJk l

hw V -

~

; W /

7/p/n

)/

m

+

l

.. ~ . . . . . _ _ - . . . . y _-_ _ _ g{

J ; oa-avoi a% hon v

l-dO<dwa i susa.nak & C. 4 ad4 t~ R Nu/Apo , 9/s/r3 .

mM.2d%% A n to r/a/n 7~k.c s//o /as

, m JIn Va.A A 1110/e2 Quac- 1/to a s L Qa-M l

I i

1 1

l L

i *

!\

il '

\

NM Anahf*mMs ___

msusr - m.

, b Qo PCL ER2K $147tL JMD M.T. .CMgCFreA 3e303(819 N

-l MEr.camuM

,i l

! TO: M. Milligan FROM: C. H. Wells i3 DATE: September 9, 1983 4

SUBJECT:

Schedule for Metallurgical Evaluation of Failed Crankshaft Sec ion from DG 102 --

First Revision j /g dh Friday. Sept. 9 e Removed crankshaft for bandsawing as follows:

1. Fracture surface in one piece from remainder of web and journal. ,

2. Quarter web and journal vertically and horizontally. Remove quarter section.

3. Saw 1/2 inch thick slices from vertical, horizontal and 4 transverse faces for macroetching, hardness impressions, chemical and physical property verification.

1 e Inspect second section of crankshaft and replicate fracture surface.

j Saturday, Sept. 10 ll e 8:30 a.m. Meeting with Jack Wallace, Ivan Sprung, Mel Schuster, 1 and John Shyne to decide how f.acture surface will be sectioned j for optical rnetallography and direct scanning electron microscopy i (SEM),ifneeded.

d Monday, Sept. 12 t{

e Complete metallography, fracture surface evaluation.

I i i Ik O -

momJo = tos ANGRE3

HouMON

PHoeaX = OEm0ff

806 TON

~ ~ ~

-.-...a..... _ , , . . - . .

I e Measure residual stress in fillet ractus as follows:

1. Surface stress by x-ray diffraction.

2. Near-surface stress gradient by strain gages and either hole drilling or troppaning. l

3. SEM examinatienof fillet radius topography.

i i Review and concurrence by:

_ mf '

t Mel Schuscir' (LILCO)

Ivan sprvdg (5hEt7

/ deff Vrtf (IDI) [/

o 6

9 l

l .

I s .

} M M

,, w ,

I i

. A_ - , __a. _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _

" " V' W " " "

~

lR1& !

r.~i i -9/,TT WM*ci em m 'g*ix &./

L h )*J.

!~

Sex / b a f ac k. / sW"/

r s/iG.udgr

'D

9%4 # ele k(4.aff9c//4feaJusgufra a9 nid a w, Gb 2,3 w4 nd& /el+

ppa /a 6 fu /w kv d aa. (dif / an av e

y' 'u df k u b & af e tU Aae bw & iek

.s4 db.L~ odd W b Na'y $ 4/ 4 W /4 aan. 4

//a rive aausgafd ik SEM. M74/4 J

& k os1y ana l2t,dhdiuAs S b h%/w

+

p-e ass-aA 5sa~a 4 s.n uusd sw +A4 /4A %put ##4w4 9w'.&l:= h/ C. Ra/d aA h. J%t y41 *eag i df%bw anabypq-l 0 Sj w w F s d' A L* wu W 4 re n ,//4< iM r n i W&'cu k Cfloh4 y ao$b J4kW M- AyM 1

WN kN/4tL A%l/b MadW . T pa, F=

l 0/cukm,146 wyr+ eu 4 <> & > ta / a v f'<k .exauuW m(t 4 m s' J<- w da dun ~ % .

da'W g/4<w p i m wad 5 A / Leo 7/94 59'1

' !*c %Rs

!! rir 1/,- c-l; g Q GAA 9/p 6.y

. +*

f , .

8

= e, a u ran a ~ a s. '

(6a $v dhuG/ $p 2)L i i

e a4 c .

N /A 4

u I Q/l b < he t<5 N secA>w- _

h4 b4 p .%.u (peJ &dn ~ e&wn).

af 4 2$d //do aJex CAbund ady,i Jagn~kg %saA &A.BdM auafudh /d,$devag &:G &8 Ny p, '

4G A4,6, No,d<, //, 77 .

i

- W 4:: A/4$d fl/Wf3

$-QC'y L~NW 9fts/M 4 l%I rac $a n,,

h 1//oe7 i

1 k -

I

~ -. . - _ . _ . .. . . . _ _ _ -

ML20080P122

Text

Dear Judges Brenner,

SUBJECT:

Navigation menu

Search