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

被引：51
作者：
Lee, D. J. [1 ]
Byun, J. C. [2 ]
Sung, J. H. [1 ]
Lee, H. W. [1 ]
机构：
[1] Dong A Univ, Dept Mat Sci & Engn, Pusan 604714, South Korea
[2] Chosun Welding Co LTD, Res Ctr, Ulsan 689896, South Korea
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 513-14卷
关键词：
AISI 304L austenitic stainless steel; Flux-cored arc welding process; Solidification mode; Solidification cracking; Ductility-dip cracking; HIGH-TEMPERATURE BEHAVIOR; DUCTILITY-DIP CRACKING; RESISTANCE; MICROSTRUCTURE; WELDMENTS; FERRITE;
D O I：
10.1016/j.msea.2009.01.049
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The crack properties and mechanical characteristics in AISI 304L stainless steel weld metals were evaluated by differentiating solidification mode using three newly designed filler wires with flux-cored arc welding (FCAW) process. Microstructure examination showed that the delta ferrite content in the deposited metals increased with an increasing equivalent ratio of chromium/nickel. Solidification cracking was observed in the first layer of deposited metal in the fully-austenite structure and its fracture surface was coated by a film of low-melting eutectics. Ductility-dip cracking (DDC) was propagated along the migrated grain boundary (MGB). The fracture surface of the DDC was shaped along the sharp ridgeline, and the preferential angle for the formation of DDC was 45 degrees to the applied load. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：154 / 159
页数：6
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