Study of mechanical properties and fracture mechanism of a new high-temperature alloys

摘要：

　　GH3230 is a new type of superalloy,it is the first study about it.This paper studied the high temperature mechanical properties of the GH3230 base metal and argon-arc welding joints by high temperature tensile test,high temperature creep test and SEM analyses.The results showed thatthe ultimate tensile strength of GH3230 argon-arc welding joints is about 85.6% of that of base metal under the same conditions.In the high temperature creep test,GH3230 argon-arc welding joints had a longer creep life than that of base metal.Both GH3230 base metal and argon-arc welding joints showed a ductile fracture.High temperature tensile fracture is cavities fracture and high temperature creep fracture is intergranular fracture.The deformation of GH3230 argon-arc welding joints is much more uniformited and smaller than that of base material,and GH3230 argon-arc welding joints has less cracks.

关键词： superalloy argon-arc welding high temperature creep high temperature tensile fracture surfaces analysis

作者: ZHANG dong-xu LIU da-shun ZHU xi-ping

作者单位: Advanced Materials Test Center, Department of Engineering Mechanics, Northwestern Polytechnical University, Xian 710072, China

会议类型: 国际会议

会议名称: 3rd International Conference on Frontiers of Manufacturing and Design Science(第三届制造与设计科学前沿国际会议(ICFMD))

会议地点: 香港

会议语种:英文

页码: 64-68

在线出版日期: 2012-12-11（万方平台首次上网日期，不代表论文的发表时间）