SUPERPLASTIC BEHAVIOUR OF A FINE GRAINED TiAl BASED ALLOY TREATED BY MULTI-STEP THERMO-MECHANICAL TREATMENT

来源期刊：中国有色金属学报(英文版)1998年第1期

论文作者：Huang Baiyun He Yuehui Deng Zhongyong Sun Jian Liu Qin

文章页码：107 - 108

Key words：TiAl;　forging;　superplasticity

Abstract: A Ti-33Al-3Cr (mass fraction, %) alloy was multi-step thermo-mechanically treated through hot can forging. Samples of the forged plate were tension tested at strain rates of 10^-5 to 10^-3s^-1 and temperatures between 1 000℃and 1075℃. At 1075℃and a strain rate of 8×10^-5s^-1, the maximum elongation(517%) was achieved. The strain rate sensitivity coefficientmwas about 0.7 under the conditions of 1 075℃and 6×10^-5s^-1.