LOW CYCLE FATIGUE IN TITANIUM ALUMINIUM FORMED BY CENTRIFUGAL SPRAY DEPOSITION
来源期刊：中国有色金属学报(英文版)1998年第2期
论文作者：Chen Wenzhe Zhang Sa Qian Kuangwu Gu Haicheng Wang Zhongguang
文章页码：240 - 244
Key words：centrifugal spray deposition (CSD); Ti-48Al-2Mn-2Nb; low cycle fatigue
Abstract: The push-pull low cycle fatigue (LCF) behaviors of Ti-48Al-2Mn-2Nb(mole fraction, %), which was formed by centrifugal spray deposition (CSD) under a low pressure vacuum condition, were investigated under the control of total cyclic strain amplitude at ambient temperature. The results show that the available cyclic strain amplitude regions of TiAl alloy are very narrow,Δεt/2 equals 0.1%~0.25%, and no cyclic hardening or softening are observed during low cycle fatigue processes. The fatigue lives of CSD samples can be improved by hot isostatic pressing (HIP). The characteristics of dislocation configurations of samples experienced different strain amplitudes have been analyzed by means of transmission electron microscopy (TEM).
