α2-Ti3Al Intermetallic Compound Prepared by Powder Metallurgy and its Mechanical Properties
In this article, a modified powder metallurgy route was adopted to fabricate a2-Ti3Al intermetallic compound. This process contains the following three main steps. Firstly, the powders of Ti and Al with predesigned atomic ratio were fully mixed and cold-compacted into preform of (Tip+Alp). Secondly, it was pre-sintered at 873K/1h+973K/2h in flowing argon atmosphere. Diffusion annealing at 1473K/6h was finally carried out in a vacuum-sealed quartz tube to obtain a2-Ti3Al intermetallics. By XRD and SEM analysis, the diffusion annealed sample was determined to contain single a2-type phase intermetallics and the diffusion mechanism for the formation of the intermetallics by powder metallurgy was also fully analyzed. Moreover, at room and elevated temperatures compressive tests were conducted in Gleeble-1500 thermo-mechanical simulator for the as-fabricated Ti3Al intermetallics, and the fracture surfaces were observed to correlate its fracture mechanism with ductility.
Intermetallics powder metallurgy Ti3Al pre-sintering diffusion annealing
Liqing CHEN Jijie WANG Lin CHEN
The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 110136 School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）