Microstructure-based modeling of the PMZ mechanical properties in 2219-T8 aluminum alloy TIG welding joint

Zhandong Wan; Yue Zhao; Qiang Wang; Tianyi Zhao; Quan Li; Jiguo Shan; Aiping Wu; Guoqing Wang

Materials & Design (Nov 2022)

Microstructure-based modeling of the PMZ mechanical properties in 2219-T8 aluminum alloy TIG welding joint

Zhandong Wan,
Yue Zhao,
Qiang Wang,
Tianyi Zhao,
Quan Li,
Jiguo Shan,
Aiping Wu,
Guoqing Wang

Affiliations

Zhandong Wan: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Yue Zhao: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Tsinghua University, Beijing 100084, China
Qiang Wang: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Tianyi Zhao: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Quan Li: China Academy of Launch Vehicle Technology, Beijing 100076, China
Jiguo Shan: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Tsinghua University, Beijing 100084, China
Aiping Wu: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Tsinghua University, Beijing 100084, China; State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China; Corresponding author at: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
Guoqing Wang: China Academy of Launch Vehicle Technology, Beijing 100076, China

Journal volume & issue: Vol. 223
p. 111133

Abstract

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Partially melted zone (PMZ) is generally the weak region in 2219-T8 aluminum alloy TIG welding joint. In this work, a microstructure-based numerical simulation was performed to analyze the tensile behavior of PMZ. The constitutive behavior and damage mechanism of eutectic structure and Al matrix were determined. Stress–strain distribution and fracture behavior in tensile process were analyzed. Quantitative relationships between eutectic structure and tensile properties of PMZ were proposed. The results showed that the maximum area and clustering of eutectic particles have significant effects on the tensile strength and elongation. Plastic strain mainly concentrated in matrix, and stress concentration occurred in larger eutectic. The tensile cracks initiated from eutectic structure and then propagated into matrix and resulted in the final fracture.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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