SUPERPLASTIC BEHAVIOR OF HOT-FORGED TiAl-BASED ALLOY

来源期刊：中国有色金属学报(英文版)1999年第2期

论文作者：Deng Zhongyong Huang Baiyun He Yuehui Liu Yong

文章页码：278 - 280

Key words：TiAl,　deformation　,superplasticity　,strain rate

Abstract: Aγ-TiAl based material with a composition of Ti-33Al-3Cr-0.5Mo(mass fraction, %) was hot forged to produce fine-grained microstructure with good homogeneity. Samples of the hot-forged material were tested at strain ates ranging from 8×10^-5s^-1 to 8×10^-4s^-1and temperatures between 1 000℃and 1 075℃to investigate its superplastic behavior. Results showed the occurrence of strain hardening and highm values which led to the good superplasticity of this alloy. Optimum superplastic forming conditions were at 1 075℃and a strain rate of 8×10^-5s^-1. Under these conditions, the maximum elongation to fracture of 517% was achieved.