Effect of heat treatment on structure and magnetic properties of Ni36Co37Al27 alloy produced by laser powder bed fusion

被引：2
作者：
Mazeeva, A. K. [1 ]
Kim, A. [1 ]
Shamshurin, A. I. [1 ]
Razumov, N. G. [1 ]
Nazarov, D. V. [2 ]
Borisov, A. N. [1 ]
Popovich, A. A. [1 ]
机构：
[1] Peter Great St Petersburg Polytech Univ, Polytech Skaya Str 29, St Petersburg 195251, Russia
[2] St Petersburg Univ, Univ Skaya Emb 13B, St Petersburg 199034, Russia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 938卷
基金：
俄罗斯科学基金会;
关键词：
Laser powder bed fusion; Selective laser melting; Additive manufacturing; Ferromagnetic shape memory alloy; Coercivity; Heat treatment; SHAPE-MEMORY ALLOYS; MICROSTRUCTURE; TEMPERATURE;
D O I：
10.1016/j.jallcom.2022.168461
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper the effect of heat treatment on the structure and magnetic properties of Ni36Co37Al27 alloy obtained by laser powder bed fusion from powders synthesized by mechanical alloying and plasma spheroidization was studied. This alloy is promising to exhibit a magnetically controlled shape memory effect at room temperature. It was shown that the base of the alloy was two-phase (beta + gamma). Sizes of the structural elements increases with a rise in annealing temperature (Tann), however, the ratio of gamma-to beta-phase decreases from Tann = 900 degrees C to Tann= 1300 degrees C, which agrees well with the observed monotonic decrease in saturation magnetization. It was also found that Hc of the alloy increases from 74.9 Oe in non-heat-treated state to about 120 Oe after the heat treatment, which is due to a decreased content of gamma-phase in combi-nation with the precipitation of gamma'-phase inclusions. The results obtained can be used in the future to manipulate the high-coercivity properties of Ni-Co-Al alloys at different stages of additive manufacturing.(c) 2022 Elsevier B.V. All rights reserved.
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页数：7
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