Manufacturing of γ-TiAl Sheet by Hot Packed Rolling of Powder Metallurgy Preform
Sheets made of light high-temperature materials such as γ-TiAl alloys have a variety of applications in aerospace structures. The compositional homogeneity of preforms offered by powder metallurgy helps to attain uniform microstructure and mechanical properties of the sheet, especially at large dimensioa This paper reports parameter optimization of sheet rolling using atomized powder of gamma alloys. The factors covered include impurity pick-up and control of the atomized powder,the influence of degassing/HIPing parameters on the soundness of the preform,and identification of optimal combinations of rolling parameters. Temperature distribution in the preform at different stage of the rolling operation was accurately simulated using a finite element method. Thermomechanical deformation map of the gamma alloys obtained on a Gleeble simulator was used as a guide to identifying the processing windows in which sheets with satisfactory mechanical properties can be produced.
Gas atomization powder metallurgy TiAl hot isostatic pressing sheet
Lei Xu Chunguang Bai Gang Wang Dejun Yu Dongsheng Xu Yuyou Cui Rui Yang
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 , China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1558-1562
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）