Dependence of aging parameters on precipitation behavior, martensitic transformation and mechanical properties of the aged Ni-Ti alloy under super high pressure
Dependence of aging parameters on precipitation behavior, martensitic transformation and mechanical properties of the aged Ni-Ti alloy under super high pressure
复制标题
时效参数对时效镍钛合金超高压析出行为、马氏体相变和力学性能的依赖性
DOI：
10.1016/j.msea.2018.09.019
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Zhao Liancheng
中科院分区：
文献类型：
--
作者：
Yi Xiaoyang;Gao Weihong;Wang Haizhen;Yao Wen;Meng Xianglong;Gao Zhiyong;Cai Wei;Zhao Liancheng
采用准均匀三维超高压对富镍镍钛合金进行时效处理。系统研究了时效条件（温度、时间和压力）对Ti 3 Ni 4相析出、马氏体相变行为和合金力学性能的影响。结果表明，超高压的施加可以提供Ti 3 Ni 4相析出的核驱动力，促进Ti 3 Ni 4相的析出。与单轴拉伸或压缩应力不同，本应力辅助时效Ni-Ti合金中Ti 3 Ni 4析出相没有明显的择优取向，这是准均匀三维应力的结果。此外，由于超高压的作用，时效态Ni-Ti合金中产生了一定数量的位错。而马氏体相变行为和力学性能的变化与Ti 3 Ni 4相的析出随时效参数的演变、内应力的产生以及热力学状态的不同密切相关。
The quasi-uniform three-dimensional super high pressure was employed in the Ni-rich Ni-Ti alloy during aging treatment. Moreover, the effects of aging conditions (temperature, time and pressure) on the precipitation of Ti3Ni4phase, martensitic transformation behavior and mechanical properties of the alloy were investigated systematically. The results revealed that the applied of super high pressure can provide the nuclear driving force of Ti3Ni4precipitate and promote the precipitation of Ti3Ni4phase. Unlike the applied of the uniaxial tensile or compressive stress, no significant preferred orientation of Ti3Ni4precipitate was observed in the present stress-assisted aged Ni-Ti alloys as a consequence of the quasi-uniform three-dimensional stress. In addition, a certain number of dislocations generated in the aged Ni-Ti alloys due to the applied of super high pressure. However, the variations of the martensitic transformation behavior and mechanical properties are closely related to the evolution of the precipitation of Ti3Ni4phase with the aging parameters and the generation of internal stress as well as the different thermodynamic state.
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影响因子：
5
作者：
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通讯作者：
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影响因子：
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