Achieving ultrafine-grained ferrite structure in friction stir processed weld metal

被引：29

作者：

Xue, P. ^{[1
]}

Ma, Z. Y. ^{[1
]}

Komizo, Y. ^{[2
]}

Fujii, H. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Osaka Univ, Joining & Welding Res Inst, Ibaraki, Osaka 5670047, Japan

来源：

MATERIALS LETTERS | 2016年 / 162卷

基金：

中国国家自然科学基金;

关键词：

Friction stir processing; Ultrafine-grained structure; Weld metal; Microstructure; Recrystallization; HIGH-STRENGTH STEELS; MECHANICAL-PROPERTIES; ACICULAR FERRITE; PIPELINE STEEL; MICROSTRUCTURE; ALLOY;

D O I：

10.1016/j.matlet.2015.09.115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrafine-grained (UFG) ferrite phase was the desired structure in the weld metal of high strength low alloy (HSLA) steel joints. In this study, submerged arc weld metal of a HSLA steel was subjected to friction stir processing (FSP) under a very low rotation rate of 80 rpm. The original coarse bainite structure was changed into UFG ferrite structure after FSP, and the grain sizes were refined to about 500 and 300 nm in the upper and lower parts of the processed zone, respectively. This study provides an effective strategy to preparing UFG ferrite structure in the weld metal of HSLA steel joints, and also a potential welding method. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：161 / 164

页数：4

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