SPS烧结Ni-Mn-In合金的马氏体相变和力学性能研究

doi:10.11896/cldb.23110107

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Abstract 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 Ni₄₅Co₅Mn₃₇In₁₃ alloy not only obtains excellent mechanical properties, but also has a sharp martensitic transformation behavior.

Key words： Ni₄₅Co₅Mn₃₇In₁₃ spark plasma sintering annealing process martensitic transformation mechanical property

Published: 10 May 2024 Online: 2024-05-13

CLC number:

TG139.6

Fund:National Natural Science Foundation of China (52301248), the Foundational Research Project of Shanxi Province (202203021222201, 202203021212304), PhD Research Startup Foundation of Taiyuan University of Science & Technology (20222057), and PhD Research Startup Foundation of Shanxi Province (20232051).

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	Articles by authors
	KUANG Yafei
	LI Yongbin
	ZHANG Yan
	CHEN Fenghua
	SUN Zhigang
	HU Jifan

Cite this article:

KUANG Yafei,LI Yongbin,ZHANG Yan, et al. Study on Martensitic Transformation and Mechanical Properties of SPS Sintered Ni-Mn-In Alloys[J]. Materials Reports, 2024, 38(9): 23110107-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23110107 OR http://www.mater-rep.com/EN/Y2024/V38/I9/23110107

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