Thermal cycling stability of ultrafine-grained TiNi shape memory alloys processed by equal channel angular pressing

Thermal cycling stability of ultrafine-grained TiNi shape memory alloys processed by equal channel angular pressing
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等通道角压制超细晶TiNi形状记忆合金的热循环稳定性

DOI:
10.1016/j.scriptamat.2012.03.005
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发表时间:
2012-07
期刊:
影响因子:
6
通讯作者:
R. Z. Valiev
R. Z. Valiev
中科院分区:
材料科学1区
文献类型:
--
作者:
Y. X. Tong;B. Guo;F. Chen;B. Tian;L. Li;Y. F. Zheng;E. A. Prokofiev;D. V. Gunderov;R. Z. Valiev

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研究了两种TiNi合金在等通道转角挤压(ECAP)过程中马氏体相变的热循环稳定性。经ECAP变形后的Ti49.2Ni50.8合金的相变行为比Ti50.2Ni49.8合金稳定。在低于500°C的温度下退火不影响Ti49.2Ni50.8合金的热循环稳定性。根据晶粒尺寸的演变,讨论了热循环稳定性与成分和退火处理的关系。
The thermal cycling stability of martensitic transformation in two different TiNi alloys processed by equal channel angular pressing (ECAP) was investigated. The transformation behavior of the as-ECAP-processed Ti49.2Ni50.8alloy was more stable than that of Ti50.2Ni49.8alloy. Annealing at a temperature below 500°C did not influence the thermal cycling stability of the Ti49.2Ni50.8alloy. The relationship between thermal cycling stability and composition and annealing treatment was discussed based on the grain size evolution.
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