Effects of HIPing Pressure on Microstructures and Properties of TiAl Alloy

来源期刊：中南大学学报(英文版)2000年第3期

论文作者：CHEN Jian-xun HUANG Bai-yun ZHOU Ke-chao ZHENG Qing PENG Kun

文章页码：140 - 142

Key words：TiAl alloy; hot isostatic pressing; pressure; microstructure; carbide

Abstract: Blended elemental Ti-34%Al powders (mass fraction), containing 1.5%TiC, were hot isostatic pressed to prepare TiAl alloys. The effects of HIPing pressure on the sintered density, microstructure, constitutions phase were studied in details. The results show that the density ofTiAl alloy increases repaidly with the increase of the HIPing pressure. At the same time, with the increase of pressure, theTi₃Al phase inmatrix disappears. TiC reactswith other substance, formingTi₂AlC phase, which precipitates at grain boundaries. With the increase of hot isostatic pressing(HIPing) pressure, the shrinkage of the alloys increases, the fine spherical Ti₂AlC phase can meet together and forms a needle-shape Ti₂AlC, and the amount of needle-shaped Ti₂AlC phase increases. The composite material of TiAl containing C can be made easily by HIPing technology.