The effect of Zn content on tensile properties and fracture toughness of Al-Zn-Mg-Cu alloy

被引：1

作者：

Jo, Yong Hee ^{[1
]}

Jung, Hyeji ^{[2
]}

Jeon, Seoyeon ^{[2
]}

Choi, Hyunjoo ^{[2
]}

Kim, Hyoung-Wook ^{[1
]}

Sung, Hyokyung ^{[2
]}

机构：

[1] Korea Inst Mat Sci, Dept Aluminum, Adv Met Div, Chang Won 51508, South Korea

[2] Kookmin Univ, Dept Mat Sci & Engn, Seoul 02707, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2025年 / 36卷

基金：

新加坡国家研究基金会;

关键词：

Al-Zn-Mg-Cu alloys; Fracture toughness; Plastic zone; eta ' precipitates; MECHANICAL-PROPERTIES; STRENGTHENING MECHANISMS; MICROSTRUCTURE; BEHAVIOR; PRECIPITATION; PHASES;

D O I：

10.1016/j.jmrt.2025.04.096

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The trade-off between strength and fracture toughness in metallic alloys remains a longstanding challenge. This study investigates the effect of Zn content on the mechanical properties and fracture behavior of Al-Zn-Mg-Cu alloys. Increasing Zn content enhances yield and tensile strength due to precipitate strengthening, driven by increased ii ' precipitate density. However, this improvement in strength is accompanied by reduced fracture toughness, as higher Zn content decreases the plastic zone size and promotes crack propagation. The high dislocation density induced by ii ' precipitates contributes to this by creating a driving force for crack propagation, further influenced by the strain field generated by fine precipitates. These findings underscore the critical role of Zn content in managing the strength-toughness trade-off, offering insights for optimizing the mechanical performance of Al-Zn-Mg-Cu alloys.

引用

页码：5696 / 5706

页数：11

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