Notched Tensile Fracture of Ti-6Al-4V Laser Welds at Elevated Temperatures

摘要：

Notched tensile tests of TH5Al-4V laser welds,which were subjected to post-weld heat treatments (PWHTs) at 482 or 704℃, were carried out in air at 25,150,300 and450℃. The results were compared with those of mill-annealed base metal (MB) specimens tested at same temperatures. In general, the notched tensile strength (NTS) of all specimens decreased with increasing temperature. The results indicated the NTS of the MB specimen was obviously higher than that of the welds at room temperature, but became much lower at 450℃. It was deduced the presence of thicker grain boundary α promoted intergranular fracture at elevated temperature accounted for the decreased NTS of the weld with the PWHT at 704℃.

关键词： Notched tensile test Tir6Al-4V laser weld postrweld heat treatment.

作者: M. Y. Lu L. W. Tsay C. Chen

作者单位: Institute of Materials Engineering,National Tavwan Ocean University,Keelung 202,Taizuan,R. O. C. Department of Materials Engineering,National Tavwan University,Taipei 106,Taizvan,R. 0. C.

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 1860-1863

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）