Study on Martensitic Transformation and Mechanical Properties of SPS Sintered Ni-Mn-In Alloys

被引：0

作者：

Kuang Y. ^{[1
,2
]}

Li Y. ^{[1
,2
]}

Zhang Y. ^{[1
,2
]}

Chen F. ^{[1
,2
]}

Sun Z. ^{[1
,2
]}

Hu J. ^{[1
,2
]}

机构：

[1] College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan

[2] Key Laboratory of Magnetoelectric Functional Materials and Applications of Shanxi Province, Taiyuan

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 09期

基金：

中国国家自然科学基金;

关键词：

annealing process; martensitic transformation; mechanical property; Ni[!sub]45[!/sub]Co[!sub]5[!/sub]Mn[!sub]37[!/sub]In[!sub]13[!/sub; spark plasma sintering;

D O I：

10.11896/cldb.23110107

中图分类号：

学科分类号：

摘要：

The Ni45Co5Mn37In13 alloy was prepared by spark plasma sintering technology. The heat treatment process and sintering process parameters were optimized to eliminate internal stresses that hinder the martensitic transformation as much as possible. The results show that the alloy in the powder state is favored to obtain a 6M martensitic structure after annealing at 773 K. The presence of the 6M martensitic structure facilitates the phase transformation, which is mainly attributed to the enhanced ordering and homogenization in the atomic structure. While the annealing time increases from 2 h to 25 h, there is no obvious change in the martensitic transformation behavior for the alloy in the powder state, which is attributed that annealing time has little effect on the atomic diffusion and the dislocation motion. As the sintering temperature increases from 873 K to 1 173 K, the compressive strength and ultimate strain of the sintered alloys raise to 1 564 MPa and 13.4%, respectively, which is attributed to the reduction of porosity, improvement of densification and strengthening of intergranular boundaries. In a word, by performing two relieved-stress annealing at low temperatures and one high-temperature sintering, the sintered Ni45 Co5Mn37 In13 alloy not only obtains excellent mechanical properties, but also has a sharp martensitic transformation behavior. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

共 31 条

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