Weldability and weld performance of candidate nickel based superalloys for advanced ultrasupercritical fossil power plants Part II: weldability and cross-weld creep performance

Abstract

Fossil fuel will continue to be the major source of energy for the foreseeable future. To meet the demand for clean and affordable energy, an increase in the operating efficiency of fossil fired power plants is necessary. There are several initiatives worldwide to achieve efficiencies >45%HHV (higher heating value) through an increase in steam temperature (700–760°C) and pressure (27.6–34.5 MPa). Realising this goal requires materials with excellent creep rupture properties and corrosion resistance at elevated temperatures. Two previous papers addressed the welding and weldability of ferritic and austenitic stainless steels. Welding and weldability of nickel based alloys will be discussed in a two-part paper. In this paper, the primary focus will be on the behaviour of candidate nickel based alloys that are being proposed in advanced ultrasupercritical power plants and with regard to weldability (Part I) and cross-weld creep performance (Part II).

Keywords

Advanced Ultrasupercritical Nickel base alloys Weldability Creep Cross-weld performance

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References

David

S. A.

, Siefert

J. A.

, DuPont

J. N.

and Shingledecker

J. P.

: ‘Weldability and weld performance of candidate nickel base superalloys for advanced ultrasupercritical fossil power plants. Part I: fundamentals’, Sci. Technol. Weld. Join., 2015, 20, (7), 532–552. doi: 10.1179/1362171815Y.0000000035

Shingledecker

, Purgert

and Rawls

: ‘Current status of the U.S. DOE/OCDO A-USC materials technology research and development program’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October, ASM International, EPRI Report No. 3002002375’, 41–52; 2013.

‘Component test facility for a 700C power plant (Comtes700)’, Final report of the European Union Directorate-General for Research and Innovation, European Union, 2013. DOI 10.2777/98172.

Fukuda

, , ‘Advanced USC technology development in Japan’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, ASM International, EPRI Report No. 3002002375’, 24–40; 2014.

Tao

: ‘Progress of Chinese 700C USC development program’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October, ASM International, EPRI Report No. 3002002375’, 1–8; 2013.

: ‘Gianfrancesco: ENCIO Project: an European approach to 700C power plant’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October, ASM International, EPRI Report No. 3002002375’, 9–23; 2013.

Mathur

: ‘India's National A-USC Mission - plan and progress’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October, ASM International, EPRI Report No. 3002002375’, 53–73; 2013.

‘INCONEL® alloy 740H®: a superalloy specifically designed for advanced ultra supercritical power generation’, PCC Energy Group, available at http://www.specialmetals.com/files/PCC%20EG%20740H%20White%20Paper.pdf (accessed 27 November 2014).

‘Haynes® 230® alloy’, Haynes International, Kokomo, IN, USA, Publication no. H-3000J, 2007.

10.

‘Haynes® 282® alloy’, Haynes International, Kokomo, IN, USA, Publication no. H-3173, 2008.

11.

“Haynes® 263 alloy’, Haynes International, Kokomo, IN, USA, Publication no. H-3047D, 2000.

12.

Klower

, Zinke

and Mentz

: ‘Development of crack-resistant alloy 617B for components in 700°C power plants’ ‘Proc. NACE Corrosion Conf. Expo, Houston, TX, USA, March 2013, NACE International’, Paper 2284 2284; 2013.

13.

‘HR6W’, Technical datasheet, Nippon Steel and Sumitomo Metal, Tokyo, Japan, January 10, 2012.

14.

‘ASME Boiler and Pressure Vessel Code’, Code Case 2684, ASME, New York, USA.

15.

L. M. Pike: personal communication, November 2014.

16.

Pike

L. M.

: ‘100+ years of wrought alloy development at Haynes International’ ‘Proc. 8th Int. Symp. on ‘Superalloy 718 and derivatives’, Pittsburgh, PA, USA, September-October 2014, The Minerals, Metals & Materials Society’, 15–30; 2014.

17.

‘ASME boiler and pressure vessel code’, Code case 2702, ASME, New York, USA, 26 September 2011.

18.

‘ASME Boiler and Pressure Vessel Code’, Code case 2805, ASME, New York, 14 May 2014.

19.

‘ASME boiler and pressure vessel code section IID’, American Society of Mechanical Engineers, New York, USA, 2010.

20.

David

S. A.

, Siefert

J. A.

and Feng

: ‘Welding and weldability of candidate ferritic alloys for future advanced ultrasupercritical fossil power plants’, Sci. Technol. Weld. Join., 2013, 18, (8), 631–651. doi: 10.1179/1362171813Y.0000000152

21.

Punshon

C. S.

: ‘Reduced pressure electron beam welding in the power generation industry, Welding and repair technology for power plants’ ‘Proc. 6th Int. EPRI Conf., Sandestin, FL, USA, June 2004, EPRI’, 548–605; 2004.

22.

‘Technology insights brief: reduced pressure electron beam welding’ 1024908, EPRI, Palo Alto, CA, USA2012.

23.

Heuser

, Heinemann

, Fuchs

, Helmrich

and Klenk

: ‘Welding alloy 617 modified for the next generation of thermal power plants’ ‘Proc. 6th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Santa Fe, NM, USA, September 2010, ASM International’, 2010. Paper 3C-06.

24.

Chen

, Stamatelopolous

G. N.

, Helmirch

, Heinemann

, Maile

and Klenk

:, ‘Materials qualification for 700°C power plants’ ‘Proc. 5th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Marco Island, FL, USA, October 2007, ASM International’, 231–259; 2007.

25.

Shingledecker

J. P.

, Siefert

J. A.

, Santella

M. L.

and Tortorelli

: ‘Creep rupture analysis of alloy CCA617 base metal and weldments’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October 2013, EPRI’, ‘Paper 124’;2013.

26.

Tak

K. G.

: ‘Welding of Ni-based alloys for advanced ultra super critical boiler’ ‘Proc. Vallourec Technical Seminar, Gurgaon, India, November 2014’, 2014.

27.

Shingledecker

J. P.

, Hendrix

, Phillips

, Siefert

J. A.

, Purgert

and Rawls

: ‘U.S. program on advanced ultrasupercritical power plant materials – the economy of using advanced alloys’ ‘Proc. IEA Clean Coal Centre Workshop: ‘Advanced ultrasupercritical coal-fired power plants’, Vienna, Austria, September 2012, IEA’, ‘Session 4, Paper 4’;2012.

28.

DeLong

J. F.

, Lafferty

P. A.

, McGough

T. C.

, Pigford

J. V.

, Tomasevich

, Ward

C. T.

and Zielke

H. E.

: ‘Selection and fabrication of replacement main-steam piping for the Eddystone No. 1 supercritical pressure unit’, Weld. J., 1985, 64, (1), 29–36.

29.

Hirata

, Okada

, Jotoku

, Ogawa

, Yoshizawa

and Ono

: ‘Weldability of HR6W for advanced high efficiency power plant’ ‘Proc. 3rd European Creep Collaborative Conf., European Creep Collaborative Committee, Rome, Italy, May 2014’, 2014;. Paper 33.

30.

‘Metrode Products Limited welding consumables technical handbook’, revision 10; 2009, Chertsey, Metrode Products Ltd.

31.

‘Technical handbook of Bohler welding products’; 2010, Bohler Schweiβtechnik Austria GmbH.

32.

DuPont

J. N.

, Lippold

J. C.

and Kiser

S. D.

: ‘Welding metallurgy and weldability of Nickel base alloys’, 2009, Hoboken, NJ, John Wiley & Sons.

33.

‘Welding metallurgy’; 2002, Hoboken, NJ, John Wiley & Sons, Inc.

34.

Siefert

J. A.

and David

S. A.

: ‘Weldability and weld performance of candidate austenitic alloys for advanced ultrasupercritical fossil power plants’, Sci. Technol. Weld. Join., 2014, 19, (4), 271–294. doi: 10.1179/1362171814Y.0000000197

35.

Saito

, Komai

and Takei

: ‘Fabrication trials of Ni-based alloys for advanced USC boiler application’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October 2013, ASM International’, Paper 156 190–201; 2013a.

36.

Ernst

S. C.

: ‘Weldability studies of Haynes 230 alloy’, Weld. J., 1994, 73, (4), 80–s-89-s.

37.

Fink

: ‘Evaluation of hot cracking susceptibility of nickel-based alloys by the PVR test’, Weld. World, 2012, 56, (7–8), 37–43. doi: 10.1007/BF03321363

38.

Kelly

T. J.

: ‘Elemental effects on cast 718 weldability’, Weld. J., 1989, 68, (2), 44-s–51-s.

39.

Kelly

T. J.

: ‘Investigation of elemental effects on the weldability of cast nickel-based superalloys’, in ‘Advances in welding science and technology’, (ed. David

S. A.

., 623–628; 1986, Materials Park, OH, ASM International.

40.

Savage

W. F.

and Lundin

C. F.

: ‘The varestraint test’, Weld. J., 1965, 44, (10), 433–s-442-s.

41.

Siefert

J. A.

, Tanzosh

J. M.

and Ramirez

J. E.

: ‘Weldability of INCONEL alloy 740’ ‘Proc. 6th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Santa Fe, NM, USA, September 2010, ASM International’, 1045–1066; 2010.

42.

Ramirez

J. E.

: ‘Susceptibility of IN740 to HAZ liquation cracking and ductility dip cracking’, Weld. J., 2012, 91, (4), 122-s–131-2.

43.

Hong

H. U.

, Kim

I. S.

, Choi

B. G.

, Yoo

Y. S.

and Jo

C. Y.

: ‘On the role of grain boundary serration in simulated weld heat affected zone liquation of a wrought nickel-based superalloy’, Metall. Mater. Trans. A, 2012, 43A, 173–181. doi: 10.1007/s11661-011-0837-2

44.

Hirata

, Okada

, Jotoku

, Ogawa

, Yoshizawa

and Ono

45.

Shingledecker

J. P.

and Pharr

G. M.

: ‘The role of eta phase formation on the creep strength and ductility of INCONEL alloy 740 at 1023 K (750 °C)’, Metall. Mater. Trans. A., 2012, 43A, (6), 1902–1910. doi: 10.1007/s11661-011-1013-4

46.

Ramirez

A. J.

and Lippold

J. C.

: ‘High temperature cracking in nickel-base weld metal. Part 2 – insight into the mechanism’, Mater. Sci. Eng. A, 2004, A380, 245–258. doi: 10.1016/j.msea.2004.03.075

47.

Noecker

F. F.

and DuPont

J. N.

: ‘Metallurgical investigation into ductility dip cracking in Ni based alloys. Part I – quantifying cracking susceptibility during first thermal cycle’, Weld. J., 2008, 88, (1), 7s–20s.

48.

Noecker

F. F.

and DuPont

J. N.

: ‘Metallurgical investigation into ductility dip cracking in Ni based alloys. Part II – microstructural and microchemical development during the first thermal cycle’, Weld. J., 2008, 88, (3), 62s–77s.

49.

Rowe

M. D.

: ‘Ranking the resistance of wrought superalloys to strain-age cracking’, Weld. J., 2006, 85, (2), 27-s–34-s.

50.

Prager

and Shira

C. S.

: ‘Welding of precipitation-hardening nickel-base alloys’, Wel. Res. Counc. Bull., 1968, 128, p. 6.

51.

Metzler

D. A.

: ‘Strain-age cracking susceptibility of Ni-based superalloys as a function of strain rate, temperature, and alloy composition’, Weld. J., 2012, 91, (6), 163–s-168-s.

52.

Berger

. ‘Untersuchung der zeitabhängigen Festigkeits- und Verformungseigenschaften von Überhitzerrohrwerkstoffen nach Kaltverformung’, Forschungsvorhaben AVIF A238, Institut für Werkstoffkunde der TU Darmstadt, 2007 to 2010. pp. 64

53.

Baker

B. A.

, Poole

J. M.

, Shoemaker

L. E.

and Smith

G. D.

: ‘Fabricating nickel alloys to avoid stress relaxation cracking’ ‘Proc. NACE Corrosion 2007 Conf. Expo, Houston, TX, USA, March 2007, NACE International, Paper No. 07421’, 2007.

54.

van Wortel

: ‘Control of relaxation cracking in austenitic high temperature components’ ‘Proc. NACE Corrosion 2007 Conf. Expo, Houston, TX, USA, March 2007, NACE International, Paper 07432’, 2007.

55.

Ramirez

J. E.

: ‘Evaluation of susceptibility of alloy IN740 to HAZ stress-relaxation cracking’, Weld. J., 2013, 92, (4), 89-s–100-s.

56.

Speicher

, Klenk

and Maile

: ‘Damage mechanism and failure mechanism behaviour of Ni-base welded joints at 700°C’ ‘Proc. 3rd European Creep Collaborative Conf., Rome, Italy, May 2014’, European Creep Collaborative Committee, ‘Paper 107’; 2014.

57.

Kubushiro

, Komura

, Tokuda

and Nakagawa

: ‘Effect of stress-relief treatment on microstructure and mechanical properties in weld joints of Fe-23Cr-45Ni-7W alloy’ ‘Proc. 3rd European Creep Collaborative Conf., Rome, Italy, May 2014, European Creep Collaborative Committee, Paper 48’, 2014.

58.

Kuhn

, Ullrich

, Tschaffon

, Beck

and Singheiser

: ‘Stress-relaxation cracking test for welded joints,’, J. Test. Eval., 2013, 41, (2), 1–10. doi: 10.1520/JTE20120019

59.

Spindler

M. W.

: ‘The use of borland specimens to reproduce reheat cracking in type 316H’ ‘Proc. Int. Conf. on ‘High temperature plant integrity and life extension’, European Technology Development, Cambridge, UK, April 2004, Session 6, Paper 5’, 2004.

60.

Special Metals Corporation: private communication, 17 June 2015.

61.

Shingledecker

J. P.

and Evans

N. D.

: ‘Creep-rupture performance of 0.07C–23Cr–45Ni–6W–Ti,Nb austenitic alloy (HR6W) tubes’, Int. J. Pres. Ves., 2010, 87, 345–350. doi: 10.1016/j.ijpvp.2010.03.011

62.

Saito

, Komai

and Takei

63.

Komai

, Saito

and Takei

: ‘Evaluation of creep rupture strength in Ni-based alloy weldments for an advanced USC boiler’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October 2013, ASM International’, ‘Paper 155’, 903–913; 2013.

64.

Tokairin

, Sato

, Shimada

, Nakagawa

and Kitamura

: ‘Verification of long term creep rupture strength and component fabricability of candidate Ni based materials for A-USC boilers’ ‘Proc. 7th Int. Conf. on Advances in materials technology for fossil power plants, Waikoloa, HI, USA, October 2013, ASM International’, ‘Paper 32’, 1006–1015; 2013.

65.

Tokairin

, Shimizu

, Sato

, Shimada

, Nakagawa

and Kitamura

: ‘Verification of practical applicability of 45Ni-23Cr-7W alloy to thick-walled component for A-USC boilers’ ‘Proc. 3rd European Creep Collaborative Conf., Rome, Italy, May, 2014’, European Creep Collaborative Committee, ‘Paper 77’; 2014.

66.

Shingledecker

J. P.

, Swindeman

R. W.

, Wu

and Vasudevan

V. K.

: ‘Creep strength of high-temperature alloys for ultrasupercritical steam boilers’ ‘Proc. 4th Int. Conf. on Advances in materials technology for fossil power plants, Hilton Head, SC, USA, October 2004, ASM International’, 1198–1212; 2004.

67.

Viswanathan

, Shingledecker

J. P.

, Hawk

and Goodstine

: ‘Effect of creep in advanced materials for use in ultrasupercritical power plants’ ‘Proc. 2nd ECCC Creep Conf. on ‘Creep & fracture in high temperature components’, Zurich, Switzerland, April 2009, DEStech Publications Inc.’, 31–43; 2009.

68.

Speicher

, Klenk

and Maile

: ‘Behavior of weldments and microstructural characterisation’ ‘Proc. VGB Workshop on ‘Materials quality and assurance’, VGB, Essen, Germany, June 2013’, ‘Paper 7’; 2013.

69.

, Shingledecker

J. P.

, Swindeman

R. W.

and Vasudevan

V. K.

: ‘Microstructure characterization of advanced boiler materials for ultra supercritical coal power plants’ ‘Proc. 4th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Hilton Head, SC, USA, October 2004, ASM International’, 748–761; 2004.

70.

Borden

, , ‘Weldability of materials for ultrasupercritical boiler applications’ ‘Proc. 4th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Hilton Head, SC, USA, October 2004, ASM International’, 837–854; 2004, Paper 7B-1.

71.

Stam

: ‘Overview of the NextGenPower Project’, in ‘Materials for advanced power engineering’ 234, ‘Schriften des ForschungszentrumsJulich, ReiheEnergie& Umwelt/Energy & Environment’, (ed. Lecomte-Beckers

),; 2014, available at https://juser.fz-juelich.de/record/185531 .

72.

Yamamoto

, Shingledecker

, Boehlert

, Ogata

and Santella

: ‘Microscopic evaluation of creep-fatigue interaction in a nickel-based superalloy’ ‘Proc. 2nd ECCC Creep Conf. on ‘Creep & fracture in high temperature components’, Zurich, Switzerland, April 2009, DEStech Publications Inc.’, 1205–1215; 2009.

73.

Barnard

: ‘Characterisation of NIMONIC 263 for thick section components for A-USC boiler applications’ ‘Proc. Conf. Global Advanced Fossil-Gen Summit’, December 6–7, 2011 172–183; 2011, Shanghai, China.

74.

Shingledecker

J. P.

: ‘Creep-rupture performance of INCONEL alloy 740H and welds’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October 2013, ASM International’, 230–241; 2013;. Paper 129.

75.

Baker

B. A.

, Gollihue

R. D.

, DeBarbadillo

J. J.

, Patel

S. J.

and Maitra

: ‘Manufacturing demonstration of INCONEL alloy 740H for A-USC boilers’ ‘Proc. 7th Int. Conf. on ‘Advances in materials technology for fossil power plants’, Waikoloa, HI, USA, October 2013, ASM International’, 215–229; 2013;. Paper 17.

76.

Bechetti

D. H.

, DuPont

J. N.

, de Barbadillo

J. J.

, Baker

B. A.

and Watanabe

: ‘Microstructural evolution of INCONEL ® alloy 740H ® fusion welds during creep’, Metall. Mater. Trans. A, 2015, 46A, 739–755. doi: 10.1007/s11661-014-2682-6

77.

Wadsworth

, Ruano

O. A.

and Sherby

O. D.

: ‘Denuded zones, diffusional creep, and grain boundary sliding’, Min. Met. Mater. Soc., 2002, 33, (2), 219–229.

78.

Porter

D. A.

and Easterling

K. E.

: ‘Phase transformations in metals and alloys’, 1992, Boca Raton, FL, Taylor and Francis Group.

79.

Tavassoli

and Colombe

: ‘Mechanical and microstructural properties of alloy 800’, Metall. Mater. Trans. A, 1978, 9A, 1203–1211. doi: 10.1007/BF02652243

80.

Selling

B. I.

and Smith

I. O.

: ‘Microstructure creep rupture ductility relationship of modified alloy 800 at 600°C’, in ‘7th Inter. Conf. on the Strength of metals and alloys’, Montreal, Quebec, Canada, August 12–16, 1985, Pergamon, New York, NY, 725–730; 1986.

81.

Rosenthal

and West

D. R. F.

: ‘Continuous γ′ precipitation in directionally solidified IN738 LC alloy’,Mater. Sci. Technol., 1999, 15, 1387–1394. doi: 10.1179/026708399101505518

82.

Sukhovarov

V. F.

, Svitich

Y. U. V.

and Rtishchev

V. V.

: ‘On the processes of discontinuous gamma prime phase precipitation and recrystallization in the gamma/gamma prime range in a Nickel-based heat resistant alloy’, Phys. Met. Metallogr. (USSR), 1981, 52, 139–144.

83.

Davies

C. K. L.

, Nash

P. G.

, Stevens

R. N.

and Yap

L. C.

: ‘Precipitation in Ni-Co-Al alloys’, J. Mater. Sci.,, 1985, 20, 2945–2957. doi: 10.1007/BF00553059

84.

and Turnbull

: ‘Morphology of cellular precipitation of Tin from Lead-Tin bicrystals’, Acta Metall., 1967, 15, 369–376. doi: 10.1016/0001-6160(67)90214-3

85.

Fournelle

and Clark

: ‘The genesis of the cellular precipitation reaction’, Metall. Mater. Trans. B, 1972, 3, 2757–2767. doi: 10.1007/BF02652842

86.

Nes

and Billdal

: ‘The mechanism of discontinuous precipitation of the metastable Al3Zr phase from an Al-Zr solid solution’, Acta Metall., 1977, 25, 1039–1046. doi: 10.1016/0001-6160(77)90133-X

87.

Manna

, Pabi

S. K.

and Gust

: ‘Discontinuous reactions in solids’, Int. Mater. Rev.,, 2001, 46, 53–91. doi: 10.1179/095066001101528402

88.

Zieba

, Gust

and Fuer

: ‘Classification of the solute concentration profiles in the discontinuous solid state phase transformations’, Met. Res. Adv. Technol., 2000, 91, 532–543.

89.

Fleetwood

M. J.

: ‘Chromium distribution around grain boundary carbides in Nimonic 80A’, J. Inst. Met.,, 1961, 90, 429.

90.

Funkenbusch

A. W.

: ‘Discontinuous gamma prime coarsening in a Ni-Al-Mo base superalloy’, Metall. Trans. A, 1983, 14A, 1283–1292. doi: 10.1007/BF02664810

91.

Zhao

S. Q.

, Jiang

, Dong

J. X.

and Xie

X. S.

: ‘Experimental investigation and thermodynamic calculation on phase precipitation of INCONEL 740’, Acta Metall. Sinica, 2006, 19, 425–431. doi: 10.1016/S1006-7191(06)62083-8

92.

Livingston

J. D.

and Cahn

J. W.

: ‘Discontinuous coarsening of aligned eutectoids’, Acta Metall., 1974, 22, 495–503. doi: 10.1016/0001-6160(74)90103-5

93.

Cahn

J. W.

: ‘The kinetics of cellular segregation reactions’, Acta Metall., 1959, 7, 18–28. doi: 10.1016/0001-6160(59)90164-6

94.

Hillert

: ‘Theories of growth during discontinuous precipitation’, Metall. Trans., 1972, 3, 2729–2741. doi: 10.1007/BF02652840

95.

Turnbull

: ‘Theory of cellular precipitation’, Acta Metall., 1955, 3, 55–63. doi: 10.1016/0001-6160(55)90012-2

96.

Schubert

, Klenk

and Maile

: ‘Determination of weld strength reduction factors for the creep rupture strength of welded joints’ ‘Proc. ECCC Creep Conf., London, UK, September 2005, DEStech Publications, Inc’, 792–805; 2005.

97.

Maile

: ‘Qualification of Ni-based alloys for advanced ultra supercritical plants’, Procedia Eng., 2013, 55, 214–220. doi: 10.1016/j.proeng.2013.03.245

98.

‘Literature review of temperbead welding techniques and considerations for grade 91 components’, 1026505, EPRI, Palo Alto, CA, USA, 2012.

99.

Asbury

F. E.

, Mitchell

and Toft

L. H.

: ‘Cracking in welded joints of austenitic steel in C.E.G.B. power stations’, Br. Weld. J., 1960, 667–678, November.

100.

Dhooge

: ‘Survey of reheat cracking in austenitic stainless steels and Ni base alloys’, Weld. World, 1998, 41, 206–219.

101.

Thomas

R. D.

: ‘HAZ cracking in thick sections of austenitic stainless steels – part I’, Weld. J., 1984, 63, (12), 24–32.

102.

Benz

W. G.

and Caughey

R. H.

: ‘Material selection and fabrication, main-steam piping for Eddystone No. 1, 1200-F and 5000-psi service’, J. Eng. Power, October, 1960, 293–314.

103.

2013;. ‘Standard test methods for determining average grain size’, ASTM E112-13, ASTM International, West Conshohocken, PA, USA, available at www.astm.org.

104.

Lippold

J. C.

: ‘Recent developments in weldability testing’, in ‘Hot cracking phenomena in welds’, (ed. Bollinghaus

and Herold

) 271–290; 2005, Berlin, Springer.

105.

Farrar

J. C. M.

: ‘Hot cracking tests – the route to international standardization’, in ‘Hot cracking phenomena in welds’, (ed. Bollinghaus

and Herold

), 291–304; 2005, Berlin, Springer.

106.

Heuser

: ‘Value of different hot cracking tests for the manufacturer of filler metals’,in ‘Hot cracking phenomena in welds’, (ed. Bollinghaus

and Herold

), 305–327; 2005, Berlin, Springer.