Optimization of processing-microstructure-properties relationship in friction-stir welded 6061-T6 aluminum alloy

被引：108
|
作者：
Malopheyev, Sergey [1 ]
Vysotskiy, Igor [1 ]
Kulitskiy, Vladislav [1 ]
Mironov, Sergey [2 ]
Kaibyshev, Rustam [1 ]
机构：
[1] Belgorod State Univ, Lab Mech Properties Nanostruct Mat & Superalloys, Pobeda 85, Belgorod 308015, Russia
[2] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 662卷
关键词：
Al-Mg-Si alloys; Friction-stir welding; Precipitation strengthening; Postweld heat treatment; MG-SI-CU; MECHANICAL-PROPERTIES; PRECIPITATION; SEQUENCE; STRENGTH; JOINTS;
D O I：
10.1016/j.msea.2016.03.063
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, a simple but effective approach for improvement of strength of friction-stir welded 6061-T6 aluminum alloys was elaborated. It involves friction-stir welding (FSW) at relatively high tool rotational speed and welding speed followed by standard post-weld aging. The selected combination of FSW parameters provides high welding temperature as well as rapid cooling rate. This leads to complete dissolution of strengthening precipitates in stir zone but hinders their coarsening in heat-affected zone. In turn, this enables to avoid the formation of softened region during subsequent aging and thus substantially enhances strength and improves ductility. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：136 / 143
页数：8
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