Hot Cracking Susceptibility in Duplex Stainless Steel Welds

被引：5

作者：

Saida, Kazuyoshi ^{[1
]}

Ogura, Tomo ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, 2-1 Yamada Oka, Suita, Osaka 5650871, Japan

来源：

THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS | 2018年 / 941卷

关键词：

Duplex stainless steels; Hot cracking; GTAW; LBW; Varestraint test; Computer simulation; Solidification segregation; PHASE;

D O I：

10.4028/www.scientific.net/MSF.941.679

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot cracking (solidification cracking) susceptibility in the weld metals of duplex stainless steels were quantitatively evaluated by Transverse-Varestraint test with gas tungsten arc welding (GTAW) and laser beam welding (LBW). Three kinds of duplex stainless steels (lean, standard and super duplex stainless steels) were used for evaluation. The solidification brittle temperature ranges (BTR) of duplex stainless steels were 58K, 60K and 76K for standard, lean and super duplex stainless steels, respectively, and were comparable to those of austenitic stainless steels with FA solidification mode. The BTRs in LBW were 10-15K lower than those in GTAW for any steels. In order to clarify the governing factors of solidification cracking in duplex stainless steels, the solidification segregation behaviours of alloying and impurity elements were numerically analysed during GTAW and LBW. Although the harmful elements to solidification cracking such as P, S and C were segregated in the residual liquid phase in any joints, the solidification segregation of P, S and C in LBW was inhibited compared with GTAW due to the rapid cooling rate in LBW. It followed that the decreased solidification cracking susceptibility of duplex stainless steels in LBW would be mainly attributed to the suppression of solidification segregation of P, S and C.

引用

页码：679 / 685

页数：7

共 20 条

[1] Effect of solution treatment temperature on the precipitation kinetic of σ-phase in 2205 duplex stainless steel welds [J].

Badji, R. ;

Bouabdallah, M. ;

Bacroix, B. ;

Kahloun, C. ;

Bettahar, K. ;

Kherrouba, N. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 496 (1-2) :447-454

[2] Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds [J].

Badji, Riad ;

Bouabdallah, Mabrouk ;

Bacroix, Brigitte ;

Kahloun, Charlie ;

Belkessa, Brahim ;

Maza, Halim .

MATERIALS CHARACTERIZATION, 2008, 59 (04) :447-453

[3]

Chun E-J., 2016, Cracking Phenomena in Welds IV, P161, DOI [10.1007/978-3-319-28434-7_9, DOI 10.1007/978-3-319-28434-7_9]

[4] Development of Laser Beam Welding Transverse-Varestraint Test for Assessment of Solidification Cracking Susceptibility in Laser Welds [J].

Chun, Eun-Joon ;

Baba, Hayato ;

Nishimoto, Kazutoshi ;

Saida, Kazuyoshi .

METALS AND MATERIALS INTERNATIONAL, 2015, 21 (03) :543-553

[5]

Ernstein A., 1965, W J, P504

[6]

Kamiya O., 1990, Q J Jpn Weld Soc, V8, P105

[7] Microstructure and properties of as welded duplex stainless steel [J].

McPherson, NA ;

Li, Y ;

Baker, TN .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2000, 5 (04) :235-244

[8] Crystallography of Widmanstatten austenite in duplex stainless steel weld metal [J].

Menezes, J. W. Abtibol ;

Abreu, H. ;

Kundu, S. ;

Bhadeshia, H. K. D. H. ;

Kelly, P. M. .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2009, 14 (01) :4-10

[9]

Miura M, 1989, Q J JPN WELD SOC, V7, P94, DOI [10.2207/qjjws.7.94, DOI 10.2207/QJJWS.7.94]

[10] Structural stability of super duplex stainless weld metals and its dependence on tungsten and copper [J].

Nilsson, JO ;

Huhtala, T ;

Jonsson, P ;

Karlsson, L ;

Wilson, A .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (08) :2196-2208

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