Development of a fine-grained microstructure and the properties of a nugget zone in friction stir welded pure copper

被引：163
作者：
Xie, G. M.
Ma, Z. Y.
Geng, L.
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
SCRIPTA MATERIALIA | 2007年 / 57卷 / 02期
关键词：
friction stir welding; copper; grain refining; hardness; strength;
D O I：
10.1016/j.scriptamat.2007.03.048
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Defect-free pure copper welds were achieved under low heat input conditions of 400-800 rpm for a traverse speed of 50 mm min(-1). The grain size of the nugget zones decreased from 9 to 3.5 mu m with decreasing rotation rate from 800 to 400 rpm. "Onion rings", consisting of different-sized grain bands, were observed at 400 rpm, but disappeared at 600-800 rpm. Variations of both microhardness and yield strength of the nugget zones with grain size followed the Hall-Petch relationship. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：73 / 76
页数：4
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