Effects of equal channel angular extrusion and aging treatment on R phase transformation behaviors and Ti3Ni4 precipitates of Ni-rich TiNi alloys
Effects of equal channel angular extrusion and aging treatment on R phase transformation behaviors and Ti3Ni4 precipitates of Ni-rich TiNi alloys
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DOI：
10.1016/j.jallcom.2011.03.062
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发表时间：
2011-05
影响因子：
6.2
通讯作者：
Xiaoning Zhang;B. Xia;Jie Song;Bing Chen;Xiao-lin Tian;Yingmin Hao;C. Xie
中科院分区：
文献类型：
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作者：
Xiaoning Zhang;B. Xia;Jie Song;Bing Chen;Xiao-lin Tian;Yingmin Hao;C. Xie
采用BCpath在500 °C对富Ni TiNi合金进行了多次等通道转角挤压（ECAE）处理。时效处理中R相变的特征与ECAE处理中R相变的特征在形貌和温度范围上不同。ECAE处理后，细小的透镜状Ti3Ni4颗粒主要在晶界附近和缠结晶界处析出。研究了时效处理和ECAE处理对R相变行为和Ti3Ni4析出相的影响及机理。
Ni-rich TiNi alloys were subjected to the effect of multiple equal channel angular extrusion (ECAE) treatments by BCpath at 500 °C. The characteristics of R phase transformation in aging treatment were dissimilar in the appearance and the temperature range to those counterparts induced by ECAE treatments. The fine lens-like shape Ti3Ni4particles precipitated mainly in the regions of near grain boundaries and on the tangled grain boundaries after ECAE treatments. The effects and mechanisms of aging treatments and ECAE treatments on R phase transformation behaviors and Ti3Ni4precipitates were investigated and discussed.