Fabrication of Large Scale Bars of Ti-6Al-4V ELI for Aerospace Application

摘要：

This paper researched the production and mechanical properties of large scale Ti-6Al-4V ELI bars. Three times vacuum arc melting were used to fabricate big Ti-6Al-4V ELI ingots. The chemical elements of impurity and aluminum, vanadium were analyzed from the topitniddle and bottom of ingot. The chemical elements of cross section also were analyzed. The difference of main and impurity elements are very small. To get the homogeneous mechanical properties was very difficult to fabricate the large scale Ti6Al-4V ELI bars. A special forging technology was adopted to improve the metallurgy microstructure for large scale bars afterwards. The macro and micro structures become finer and finer from the beginning to the end during forging. The very fine grain and very homogenous microstructure are observed in large scale bars from φ200mm to φ650mm. The mechanical properties and the damage tolerance properties indicate that the large scale bars could be used to make the important parts of aircraft.

关键词： Ti-6Al-4V ELI moderate strength damage tolerance properties vacuum arc melting chemical elements macro and micro structure

作者: Baoquan Fu Pingxiang Zhang Wensheng Wang Xiaoyun Shi Xiaomiao Cheng Xianghong Liu Yong Feng

作者单位: School of Materials Science and Engineering,Northwestern Polytechnical University,Xian 710072,China Western Superconducting Technologies Co.,Ltd,Xian 710018,China

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: 1984-1987

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）