Comparative Study on Wire-Arc Additive Manufacturing and Conventional Casting of Al–Si Alloys:Porosity,Microstructure and Mechanical Property

作     者：Yueling Guo Qifei Han Jinlong Hu Xinghai Yang Pengcheng Mao Junsheng Wang Shaobo Sun Zhi He Jiping Lu Changmeng Liu Yueling Guo;Qifei Han;Jinlong Hu;Xinghai Yang;Pengcheng Mao;Junsheng Wang;Shaobo Sun;Zhi He;Jiping Lu;Changmeng Liu

作者机构：School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Center for Micro and Nano TechnologiesBeijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081China Beijing Hangxing Machinery Manufacturing Co.Ltd.Beijing 100013China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第3期

页      面：475-485页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial support of the China Postdoctoral Science Foundation(No.2021M690384) the Beijing Institute of Technology Research Fund Program for Young Scholars 

主　　题：Wire-arc additive manufacturing Al–Si alloy Porosity Microstructure Strength 

摘      要：Here,we compare the porosity,microstructure and mechanical property of 4047 Al–Si alloys prepared by wire-arc additive manufacturing(WAAM)and conventional casting.X-ray microscopy reveals that WAAM causes a higher volume fraction of gas pores in comparison with conventional *** refi nements ofα-Al dendrites,eutectic Si particles and Ferich intermetallic compounds are achieved by WAAM,resulting from its rapid solidifi cation *** ultimate tensile strength(UTS,up to 205.6 MPa)and yield stress(YS,up to 98.0 MPa)are improved by WAAM at the expense of elongation after *** mechanical property anisotropy between scanning direction and build direction is minimal for alloys via *** microstructure refi nement and strength enhancement are enabled by increasing the travel speed of welding torch from 300 to 420 mm/min.