Mechanical and Damping Behavior of Age-Hardened and Non-age-hardened Al Alloys After Friction Stir Processing

作     者：Hiang-Jie Jiang Bing Zhang Chong-Yu Liu Zhen-Xing Yang Zong-Yi Ma 

作者机构：College of Material Science and EngineeringGuilin University of TechnologyGuilin 541004China State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China Alnan Aluminium Co.Ltd.Nanning 530031China Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China 

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

年 卷 期：2019年第32卷第9期

页      面：1135-1141页

核心收录：

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

基　　金：financially supported by the National Natural Science Foundation of China (No. 51601045) the Guangxi Natural Science Foundation (No. 2016GXNSFDA380028) the Science and Technology Major Project of Guangxi (No. GKAA17202007) 

主　　题：Aluminum alloy Mechanical properties Damping 

摘      要：This study investigated the microstructure,mechanical,and damping properties of a non-age-hardened Al alloy(5086)and an age-hardened Al alloy(7075)after friction stir processing(FSP).Microstructural analyses indicate that FSP led the grain refinement of samples,and the grains size decreased with the decrease in the tool rotation ***,FSP with low rotation rate promotes theηphase precipitation in the 7075 alloy,causing the micron-sized particles in the 5086 alloy to break *** being subjected to FSP with low rotation rate,the 5086 and 7075 alloys exhibited excellent mechanical and damping *** improved properties were ascribed to their equilibrium grain boundaries,fine grain,low density of dislocations,high fraction of high misorientation angle,and uniform particle distribution.