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Abstract

The heat affected zone cracking-tendency of type 347 stainless steel was evaluated in five different samples of thick walled pipe or plate differing in Nb, C, and N content, Nb/(C + N) factor, P + S content, and base metal ferrite content. A combination of Gleeble hot ductility and spot varestraint tests, followed by optical and electron metallography, was employed to elucidate the role of Nb in such persistent cracking. Susceptibility to HAZ cracking as a result of liquation was always found to be associated with eutectics of Nb rich phases and austenite, but with a complex interplay between the Nb/(C + N) factor, the P + S impurity level, Nb carbide or carbonitride size and distribution, ferrite number, and ferrite form and distribution in the base metal. A key role for composition and also base metal thermomechanical processing is suggested that merits more intensive systematic study.

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References

Arata

, Matsuda

, and Saruwatari

: Trans. JWRI, 1974, 3, (1), 2–11.

Poole

L. K.

Weld. J., 1953, 32, (8), 403s–412s.

Christoffel

R. J.

: Weld. J., 1960, 39, (7), 315s–320s.

Morishige

, Kuribayashi

, Okabayashi

, and Naiki

: Proc. 3rd Int. Symp. of the Japan Welding Society, Japan, 1978, Paper 3JWS–65.

Folkhard

: ‘Welding metallurgy of stainless steel’, 209–214; 1987, Boston, MA, Springer—Verlag.

Bieniussa

, Grosser

E. D.

, Lorenz

, And Zeibig

: Nucl. Eng. Int., 1974, 19, (213), 94–96.

‘ASM handbook’, Vol. 6, 500, 686–695; 1993, Materials Park, OH, ASM International.

Linnert

G. E.

: STP 418, 116–117; 1958, Philadelphia, PA, ASTM.

Robinson

J. L.

and Scott

M. H.

: Philos. Trans. R. Soc. (London) A, 1980, A295, 105–117.

10.

Thomas

R. D.

Jr : Weld. J., 1984, 63, (12), 24–32.

11.

Thomas

R. D.

Jr : Weld. J., 1984, 63, (12), 355s–368s.

12.

Dijooge

and Vinckier

: Weld. World, 1986, 24, (5/6), 2–18.

13.

Cullen

T. M.

and Freeman

J. W.

: J. Eng. Power (Trans. ASME), 1963, 85, 151–164.

14.

Fleischmann

W. L.

: Weld. J., 1954, 33, (9), 459s–468s.

15.

Kotechi

: American Welding Society C. A. Adams Lecture, Chicago, IL, USA, April 1996.

16.

Kou

: ‘Welding metallurgy’, 179–187, 243–246, 369–375; 1987, New York, John Wiley.

17.

Gooch

T. G.

, Howard

R. D.

, McKeown

, and Widgery

D. J.

: Proc. Conf. ‘Welding research for power plants’, Southampton, UK, 1972, Paper 29, 401–411.

18.

Haivimar

and Svensson

: ‘Solidification and casting of metals’, 401–410; 1979, London, The Metals Society.

19.

Lundin

C. D.

, Lee

C. H.

, and Qiao

C. Y. P.

: ‘Final report of the group-sponsored study on weldability and hot ductility behavior of nuclear grade austenitic stainless steels’, University of Tennessee, Knoxville, TN, 1988.

20.

Savage

W. E

and Lundin

C. D.

: Weld. J., 1965, 44, (10), 433s–442s.

21.

Goodwin

: ‘The effect of minor elements on the hot cracking of Inconel 600’, PhD thesis, Rensselaer Polytechnic Institute, Troy, NY, USA, 1968.

22.

Yeniscavich

: Weld. J., 1966, 45, (8), 344s–356s.

23.

Thompson

R. G.

: ‘A generalized theory of HAZ microfissuring susceptibility in Nb-bearing alloys’, Project Report, University of Alabama, Birmingham, AL, 1988.

24.

Messler

R. W.

Jr and Li

: ‘The effect of Nb, C, and N content and Nb :(C + N) ratio on Nb partitioning and weld cracking behavior in type 347 stainless steel’, Final Report to Welding Research Council High Alloys Committee, New York, NY, 1996.

25.

Yamaguchi

: Ind. Heat., 1986, 53, (9), 63–72.

26.

Campbell

D. C.

and Thomas

R. D.

Jr : Weld. J., 1946, 25, (11), 760s–768s.

27.

Savage

W. F.

and Lippold

J. C.

: Weld. J., 1980, 59, (5), 48s–58s.

28.

Stokeowic

: Proc. Conf. on ‘Stainless steels for the fabricator and user’, ISI Publication 117; 1969, Birmingham, Iron and Steel Institute and Birmingham Metallurgical Association.

29.

Tamura

and Watanabe

: Trans. Jpn Weld. Soc., 1974, 5, (1), 21–31.

30.

Donati

J. R.

, Lehyede

, and Zacharie

: Rev. Metall., Nov. 1975, 823–836.

31.

Donati

J. R.

and Zacharie

: Rev. Metall., Dec. 1974, 905–915.

32.

Lin

and Lippold

J. C.

: Proc. 76th AWS Annual Meeting, Cleveland, OH, USA, April 1995, American Welding Society.

Weld heat affected zone liquation cracking in type 347 stainless steel

Abstract

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