Influence of high frequency vibration on microstructure and mechanical properties of TIG welding joints of AZ31 magnesium alloy

作     者：温彤 刘诗尧 陈世 刘澜涛 杨臣 Tong WEN;Shi-yao LIU;Shi CHEN;Lan-tao LIU;Chen YANG

作者机构：重庆大学材料科学与工程学院重庆400044 

基　　金：Project(2012ZX04010-081)supported by the National High-tech Research and Development Program of China Project(CDJZR12110072)supported by Fundamental Research Funds for Central Universities of China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2015年第25卷第2期

页      码：397-404页

摘      要：A device for superimposing vibration on workpiece in both horizontal and vertical directions during tungsten-arc inert gas （TIG） welding was developed, with maximum power output of 2 kW at frequency of 15 kHz. AZ31 sheets with thickness of I and 3 mm were used in the vibratory welding. Microstructures along with the mechanical properties of the weld joints under different vibrating conditions （vibration direction, vibration amplitude and groove angle） were examined. It is observed that the grain size in welding zone decreases remarkably with the application of vibration, while the amount of second phase β-Mg_17Al_12 within the zone decreases slightly; meanwhile, microhardness of the weld joints, macroscopic tensile strength and elongation of the weldment increase. Vibration, especially the one along vertical direction, has more impact on the performance of the thick weldments. Influence of vibration on mierostructure and mechanical properties of weldments is affected by wave energy transferring in the melt and depends on the processing and geometric parameters including amplitude and direction of vibration, thickness, and groove angles.

主 题 词：magnesium alloy TIG welding vibration microstructure mechanical properties 

学科分类：080503[080503] 0806[工学-电气类] 08[工学] 0818[工学-交通运输类] 0815[工学-矿业类] 0805[工学-能源动力学] 0813[工学-化工与制药类] 0703[理学-化学类] 0802[工学-机械学] 0814[工学-地质类] 0702[理学-物理学类] 080201[080201] 

核心收录：

D　O　I：10.1016/S1003-6326(15)63616-0

馆 藏 号：203184597...