Welding of Ti-6Al-4V alloy using dynamically controlled plasma arc welding process

作     者：陈建春 潘春旭 CHEN Jian-chun;PAN Chun-xu

作者机构：武汉大学物理科学与技术学院电子显微镜中心武汉430072 

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

年 卷 期：2011年第21卷第7期

页      面：1506-1512页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Project(2009CB939705) supported by the National Basic Research Program of China Project(200233) supported by the Foundation for the Author of National Excellent Doctoral Dissertation of China (FANEDD) 

主　　题：dynamically controlled plasma arc welding Ti alloy welding microstructure fracture microhardness 

摘      要：A novel dynamically controlled plasma arc welding process was introduced,which is able tominimize heat input into the workpiece materials while maintaining desired full penetration,and it was used to weld Ti-6Al-4V alloy *** microstructures,facture surfaces and microhardness of the welded joints were characterized by using optical microscope,scanning electron microscope （SEM） and Vickers microhardness *** with welds such as gas tungsten arc and conventional plasma arc processes,the experimental results revealed the improvements when using the present process including：1） reducing prior-beta （β） grain size and prohibiting formation of hard martensite phases in the fusion zone due to the decreased heat input;and 2） better toughness and higher hardness.