Improvement in tensile properties of 2219-T8 aluminum alloy TIG welding joint by PMZ local properties and stress distribution

被引：34

作者：

Wan, Zhandong ^{[1
]}

Wang, Qiang ^{[1
]}

Zhao, Yue ^{[1
,2
]}

Zhao, Tianyi ^{[1
]}

Shan, Jiguo ^{[1
,2
]}

Meng, Danyang ^{[3
]}

Song, Jianling ^{[3
]}

Wu, Aiping ^{[1
,2
,4
]}

Wang, Guoqing ^{[5
]}

机构：

[1] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Key Lab Adv Mat Proc Technol, Minist Educ, Beijing 100084, Peoples R China

[3] Tianjin Long March Launch Vehicle Mfg Co Ltd, Tianjin 300462, Peoples R China

[4] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China

[5] China Acad Launch Vehicle Technol, Beijing 100076, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 839卷

基金：

中国国家自然科学基金;

关键词：

2219-T8 aluminum alloy; Partially melted zone (PMZ); TIG welding; Tensile properties; Stress distribution; PARTIALLY MELTED ZONE; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; HEAT-TREATMENT; BEHAVIOR;

D O I：

10.1016/j.msea.2022.142863

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tensile properties of 2219-T8 aluminum alloy TIG welding joints were seriously restricted by partially melted zone (PMZ) properties and stress concentration at weld toe. In this work, PMZ local properties were enhanced by refining grains size and theta phase particles in base metal. And the stress concentration at weld toe was adjusted using three-pass welding with swing. The results showed that tensile strength of PMZ was increased by -16-21 MPa, due to the higher Cu content of matrix, as well as reduced coarse and continuous eutectic. The joint tensile strength of -318 MPa (-10% increase) and elongation of -5.8% (-26% increase) were obtained by improving PMZ local properties and matching proper stress distribution.

引用

页数：16

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