Fatigue performance rejuvenation of corroded 7075-T651 aluminum alloy through ultrasonic nanocrystal surface modification

被引：25

作者：

Zhang, Ruixia ^{[1
]}

Zhao, Weidong ^{[1
,2
]}

Zhang, Hao ^{[1
]}

Yang, Wenjing ^{[1
]}

Wang, Guo-Xiang ^{[1
]}

Dong, Yalin ^{[1
]}

Ye, Chang ^{[1
]}

机构：

[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA

[2] Northwestern Polytech Univ, Corros & Protect Res Lab, Xian 710072, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 153卷

关键词：

Ultrasonic nanocrystal surface modification; Compressive residual stresses; Corrosion; Rejuvenation; Rotating-bending fatigue; RESIDUAL-STRESS; STAINLESS-STEEL; NICKEL-TITANIUM; CRACK; LIFE; MICROSTRUCTURE; CORROSION; BEHAVIOR; ENHANCEMENT; TRANSITION;

D O I：

10.1016/j.ijfatigue.2021.106463

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study, ultrasonic nanocrystal surface modification (UNSM) was used to rejuvenate the fatigue performance of pre-corroded 7075-T651 aluminum alloy. The fatigue life of specimens subjected to pre-corrosion and burnishing was found to be only slightly higher than that of corroded specimens, while the fatigue life of the specimens subjected to pre-corrosion and UNSM treatment was twenty times higher than that of the corroded specimens. The findings of this study demonstrate that the repair of the corroded surface layer, surface workhardening, and beneficial compressive residual stress induced by UNSM are responsible for the fatigue performance rejuvenation of the pre-corroded alloy.

引用

页数：11

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