Effects of ultrasonic peening treatment layer by layer on microstructure of components fabricated by wire and arc additive manufacturing

被引：28

作者：

Tian, Yinbao ^{[1
,2
]}

Shen, Junqi ^{[2
]}

Hu, Shengsun ^{[2
]}

Han, Jian ^{[1
]}

Wang, Qian ^{[1
]}

Cai, Yangchuan ^{[1
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300354, Peoples R China

[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin, Peoples R China

来源：

MATERIALS LETTERS | 2021年 / 284卷

基金：

中国国家自然科学基金;

关键词：

Metals and alloys; Additive manufacturing; Ultrasonic peening treatment; Microstructure; Nanoparticles;

D O I：

10.1016/j.matlet.2020.128917

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To improve the coarse grains of Al alloy, the ultrasonic peening treatment layer by layer was used during wire and arc additive manufacturing process of Al alloy. The severe deformation layer of last deposited layer was remelted when a new layer was deposited. In an Al alloy component, the matrix and transition layer were formed alternately. The pore was compressed under the effect of ultrasonic peening treatment, which led to a decrease of pore diameter. The equiaxed grain area was formed due to the anisotropy in grain growth and the increase of nucleation particles. In equiaxed grain area, the grains with a diameter of 200-400 nm, dislocation wall and dislocation tangle were formed. (c) 2020 Elsevier B.V. All rights reserved.

引用

页数：4

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