γ-TiAl基金属间化合物合金的显微组织与内应力研究

Microstructures and Residual Stresses of TiAl -Based Intermetallic Alloys

通过采用不同的热处理工艺，对锻造后的ＴｉＡｌ基金属间化合物进行热处理，得到了含有不同等轴 γ及片层 （γ＋α）时体积比的双态组织，并采用Ｘ射线衍射技术对试样进行内应力测定。实验结果表明，ＴｉＡｌ基金属间化合物合 金中的内应力随显微组织及α２的体积分数的变化而变化，并对实验结果及产生内应力的原因进行了分析。

A series of fine duplex microstructures of TiAl-based intermetallic alloys have been obtained by various heat treatments. The residual stresses of different microstructures were evaluated using X-ray diffraction technique. It was found that the residual stresses change with the microstroctures and the volume fraction of alpha (2) phase.