Microstructures and properties of a high strength, toughness, and corrosion resistance Al-Zn-Mg-Cu alloy under an over-aging state

被引：3

作者：

Han, Baoshuai ^{[1
]}

Zheng, Xu ^{[2
,3
]}

Wang, Wei ^{[1
]}

Zhang, Yong ^{[2
]}

Xu, Yanjin ^{[1
]}

He, Kezhun ^{[3
]}

Zeng, Yuansong ^{[1
]}

Zhang, Xinming ^{[2
,3
]}

机构：

[1] AVIC Mfg Technol Inst, Beijing 100024, Peoples R China

[2] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[3] Alnan Aluminium Co Ltd, Nanning 530031, Guangxi, Peoples R China

来源：

MATERIALS LETTERS | 2022年 / 325卷

基金：

中国国家自然科学基金;

关键词：

Metals and alloys; Microstructure; Aging treatment; Fracture toughness;

D O I：

10.1016/j.matlet.2022.132674

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work studied an Al-Zn-Mg-Cu alloy with excellent comprehensive properties using a novel heat treatment. The result shows that the fracture toughness (K-IC) value of 65.2 +/- 2.0 MPa.m(1/2) and critical stress intensity factor (K-ISCC) of 37.9 +/- 1.7 MPa.m(1/2) can be achieved. Each of which is the highest value reported. The fatigue strength with this heat treatment exceeded 180 MPa at the stress ratio of -1 (sigma(-1)), which was much higher than the other Al-Zn-Mg-Cu alloys with similar tensile strength. This superior combination of mechanical properties and fracture toughness for the studied alloy is greatly attributed to a significant fraction of deformed grain structures and dense age hardening precipitates evolved from existing G.P. zones.

引用

页数：4

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