Effect of Cr/Ni equivalent ratio on ductility-dip cracking in AISI 316L weld metals

被引：24

作者：

Jang, A. Y. ^{[1
]}

Lee, D. J. ^{[1
]}

Lee, S. H. ^{[1
]}

Shim, J. H. ^{[2
]}

Kang, S. W. ^{[3
]}

Lee, H. W. ^{[1
]}

机构：

[1] Dong A Univ, Dept Mat Sci & Engn, Pusan 604714, South Korea

[2] ESAB SeAH Corp, Changwon Si 641120, Kyung Sang Nam, South Korea

[3] Pusan Natl Univ, Dept Naval Architecture & Ocean Engn, Pusan 609735, South Korea

来源：

MATERIALS & DESIGN | 2011年 / 32卷 / 01期

关键词：

ALLOYS;

D O I：

10.1016/j.matdes.2010.06.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ductility-dip cracking (DDC) susceptibility of AISI 316L stainless steel weld metals was examined. Modified flux cored arc welding (FCAW) filler wires were fabricated with various chromium and nickel contents. The solidification mode and delta-ferrite content were determined from the chromium and nickel equivalent ratios (Cr-eq/Ni-eq). Ductility-dip cracking occurred through a grain boundary sliding mechanism in the reheated region of the weld metal in the ferrite at cell and dendrite boundaries (AF mode), and the primary course of DDC formation was associated with the straight migrated grain boundary (MGB) morphology. No DDC was observed in the tortuous MGB due to the pinning effect of delta-ferrite in the continuous network of vermicular type of ferrite (FA mode)/acicular ferrite and continuous austenite network (F mode) weld metals. The DDC at the triple point or the intersection of the MGB showed a creep-like morphology. Severe localized and thermal plastic deformation was observed through the formation of micro-voids when grain boundary sliding was generated in the ductility-dip temperature range under strong restraint conditions. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.

引用

页码：371 / 376

页数：6

共 21 条

[1]

BOWERS R, 1997, UNPUB

[2]

Collins MG, 2004, WELD J, V83, p39S

[3]

Cordea J.N., 1964, WELD J, V11, p481s

[4]

Fredriks H., 1968, BRIT WELD J, V4, P178

[5]

HEMSWORTH B, 1969, MET CONSTR-BRIT WELD, V1, P5

[6]

HONEYCOMBE J, 1970, MET CONSTR-BRIT WELD, V2, P375

[7]

John C., 2005, WELDING METALLURGY W

[8]

KIKEL JM, 1998, TRENDS WELD RES, V1, P757

[9] The dependence of crack properties on the Cr/Ni equivalent ratio in AISI 304L austenitic stainless steel weld metals [J].

Lee, D. J. ;

Byun, J. C. ;

Sung, J. H. ;

Lee, H. W. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 513-14 :154-159

[10]

LONG CJ, 1973, WELD J, V52, pS281

← 1 2 3 →