Grain-Refinement and Mechanical Properties Optimisation of A356 Casting Al by Ultrasonic-Assisted Friction Stir Processing

被引：16

作者：

Ma, Lin ^{[1
]}

Zhou, Changzhuang ^{[1
]}

Shi, Yao ^{[1
]}

Cui, Qinghe ^{[1
]}

Ji, Shude ^{[1
]}

Yang, Kang ^{[1
]}

机构：

[1] Shenyang Aerosp Univ, Sch Mat Sci & Engn, Shenyang 110136, Peoples R China

来源：

METALS AND MATERIALS INTERNATIONAL | 2021年 / 27卷 / 12期

基金：

中国国家自然科学基金;

关键词：

A356 Al alloy; Ultrasound; Friction stir processing; Grain-refinement; DYNAMIC RECRYSTALLIZATION; WELDING TEMPERATURE; MATERIAL FLOW; MICROSTRUCTURE; ALLOY; BEHAVIOR; SUPERPLASTICITY; VIBRATION; TEXTURE; NUGGET;

D O I：

10.1007/s12540-020-00952-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Conventional friction stir processing (FSP) and ultrasonic-assisted friction stir processing (Ua-FSP) were applied to modify the microstructure and enhance the mechanical properties of as-cast A356 aluminium alloy. A series of experiments with different processing parameters were conducted in these two processing methods. Forming characteristics, grain-refinement, and mechanical properties in FSP and Ua-FSP were compared to determine the effect of ultrasound. The results revealed that ultrasound improved the grain-refinement level in both grain size and grain uniformity. Further, the effect of ultrasound on microstructural evolution was more significant with relatively high processing heat-input. Ultrasonic vibration also positively affected the hardness, tensile strength, and elongation.

引用

页码：5374 / 5388

页数：15

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