Martensitic transformation and mechanical properties of Ti-Ni-Hf high temperature shape memory alloy with network structure second particles
Martensitic transformation and mechanical properties of Ti-Ni-Hf high temperature shape memory alloy with network structure second particles
复制标题
网状结构第二颗粒Ti-Ni-Hf高温形状记忆合金的马氏体相变及力学性能
DOI：
10.1016/j.jallcom.2017.11.270
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发表时间：
2018-02
影响因子：
6.2
通讯作者：
Zhao Liancheng
中科院分区：
文献类型：
--
作者：
Yi Xiaoyang;Sun Kuishan;Gao Weihong;Meng Xianglong;Cai Wei;Zhao Liancheng
Ti-Ni-Hf合金中第二相的重新分布是通过快速凝固合金粉末的热压烧结实现的。第二相主要分布在原合金粉末除晶界以外的表面，形成网状结构。当烧结温度不超过1100℃时，第二相是(Ti,Hf)2Ni相。 (Ti,Hf)2Ni 和 Hf2Ni 相在 1150 °C 的烧结温度下共存。第二相类型和分布的变化导致了马氏体转变温度的变化。当烧结温度从1000℃升高到1100℃时，马氏体转变温度略有升高，而当烧结温度为1150℃时，马氏体转变温度又降低。具有第二相形成的网络结构的烧结Ti-Ni-Hf合金表现出较高的抗压强度和较大的可恢复应变，而没有显着牺牲压缩应变。
The redistribution of the second phases in Ti-Ni-Hf alloy was achieved by the hot-pressed sintering of the rapid solidified alloy powders. The second phases distributed mainly at the surface of the original alloy powder other than the grain boundaries, forming a network structure. The second phase was (Ti,Hf)2Ni phase, when the sintering temperatures were not more than 1100 °C. The (Ti,Hf)2Ni and Hf2Ni phases coexisted at the sintering temperature of 1150 °C. Such a change of the second phases in type and distribution led to the variation of the martensitic transformation temperatures. The martensitic transformation temperatures increased slightly when the sintering temperatures increased from 1000 °C to 1100 °C and then decreased when the sintering temperature was 1150 °C.The sintered Ti-Ni-Hf alloys with a network structure formed by the second phases showed the higher compressive strength and the larger recoverable strain, without significantly sacrificing the compressive strain.
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影响因子：
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