Corrosion susceptibility and mechanical properties of friction-stir-welded AA2024-T3 joints

被引：5

作者：

Li, Na ^{[1
,2
]}

Xu, Yaxin ^{[1
]}

Li, Wenya ^{[1
]}

Niu, Pengliang ^{[3
]}

Vairis, Achilles ^{[1
,4
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Peoples R China

[2] Shaanxi Railway Inst, Weinan 714000, Shaanxi, Peoples R China

[3] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, 696 Fenghe South Rd, Nanchang, Jiangxi, Peoples R China

[4] Hellen Mediterranean Univ, Mech Engn Dept, Iraklion 71004, Crete, Greece

来源：

WELDING IN THE WORLD | 2022年 / 66卷 / 05期

基金：

中国博士后科学基金;

关键词：

Friction stir welding; Aluminum alloy; Mechanical properties; Corrosion sensitivity; TEMPER CONDITION; MICROSTRUCTURE; BEHAVIOR; PARAMETERS; THICK;

D O I：

10.1007/s40194-022-01282-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

YY The joining of AA2024-T3 with friction stir welding (FSW) at a rotational speed of 600 rpm and welding speed of 200 mm/ min produces areas with significantly different heterogeneous microstructures, which relate to mechanical properties and corrosion behavior. In this study, the mechanical properties and corrosion susceptibility of different zones of an AA2024-T3 joint were investigated with tensile, hardness, and electrochemical testing. The joint was found to have reduced mechanical properties compared to base metal due to the significant microstructural changes. The developing localized high temperatures allow re-formation of the Guinier-Preston-Bagaryatsky (GPB) zone and dissolution of S phase, resulting in lowers hardness in the stir zone (SZ). Tensile test specimens failed in the lowest hardness area located in the heat-affected zone (HAZ) at the retreating side (RS). The SZ exhibited a relatively low pitting corrosion resistance compared to that of the BM and HAZ of the top surface, due to the refined grains and a larger number of intermetallic particles during welding.

引用

页码：951 / 960

页数：10

共 37 条

[1] Mechanical and metallurgical properties of dissimilar AA6061-T6 and AA7277-T6 joint made by FSW technique [J].