Laser powder bed fusion of a Fe-Mn-Si shape memory alloy

被引：63
作者：
Ferretto, I [1 ]
Kim, D. [2 ]
Della Ventura, N. M. [1 ]
Shahverdi, M. [1 ]
Lee, W. [2 ]
Leinenbach, C. [1 ]
机构：
[1] Swiss Fed Labs Mat Sci & Technol, Empa, CH-8600 Dubendorf, Switzerland
[2] Korea Inst Ind Technol, Dongnam Div, Yangsan 50623, South Korea
来源：
ADDITIVE MANUFACTURING | 2021年 / 46卷
基金：
瑞士国家科学基金会; 新加坡国家研究基金会;
关键词：
Laser powder bed fusion; Texture; Microstructure; Shape memory alloys; Shape memory effect; PHASE-TRANSFORMATION BEHAVIOR; CIVIL ENGINEERING STRUCTURES; MELTING PROCESS PARAMETERS; INDUCED EPSILON-MARTENSITE; MECHANICAL-PROPERTIES; DEFORMATION; MICROSTRUCTURE; STRIPS; NITI;
D O I：
10.1016/j.addma.2021.102071
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The iron-based Fe-17Mn-5Si-10Cr-4Ni shape memory alloy (SMA) has been manufactured by laser powder bed fusion (LPBF) for the first time. High strength, elongation and ductility are observed after annealing. In addition, pronounced shape memory effect (SME) and pseudo-elasticity (PE), which exceed those measured for the conventionally fabricated Fe-17Mn-5Si-10Cr-4Ni-1(V,C) alloy containing VC precipitates, are achieved. The texture generated during the LPBF process brings to SME and PE highly dependent on the orientation of the loading direction with respect to the build direction. Improved strain recovery is observed when the loading direction is parallel to the build direction due to an increased amount of (101) orientated grains with high Schmid factor and low yield strength for phase transformation. Pronounced shape recovery is also obtained in more complex geometries successfully fabricated with the same manufacturing technique.
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页数：12
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