Control of microstructure and shape memory properties of a Fe-Mn-Si-based shape memory alloy during laser powder bed fusion

被引：32

作者：

Ferretto, I. ^{[1
,2
]}

Borzi, A. ^{[1
]}

Kim, D. ^{[3
]}

Ventura, N. M. Della ^{[1
]}

Hosseini, E. ^{[1
]}

Lee, W. J. ^{[4
]}

Leinenbach, C. ^{[1
,2
]}

机构：

[1] Empa Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[2] Ecole Polytech Fed Lausanne EPFL, Lab Photon Mat & Characterizat, CH-1015 Lausanne, Switzerland

[3] Korea Inst Ind Technol, Dongnam Div, Yangsan 50623, South Korea

[4] Pusan Natl Univ 2, Sch Mat Sci & Engn, Busandaehak ro 63,beon gil, Pusan 46241, South Korea

来源：

ADDITIVE MANUFACTURING LETTERS | 2022年 / 3卷

关键词：

Additive manufacturing; Laser powder bed fusion; Shape memory alloys; Microstructure manipulation; INCONEL; 718; STEEL; PRECIPITATION; MANGANESE; BEHAVIOR; EVOLUTION; NITI;

D O I：

10.1016/j.addlet.2022.100091

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe-Mn-Si shape memory alloys are materials, whose functional properties strongly depend on microstructural factors such as grain size and orientation, phase fraction and chemical composition. The present study demonstrates the possibility of microstructure modification via process parameter variation on a Fe-Mn-Si based shape memory alloy fabricated by laser powder bed fusion. By varying the scan speed, samples characterized by coarse elongated grains with strong < 001 > orientation along the build direction or by finer equiaxed grains without preferential orientation can be fabricated. Changes in the volume phase fraction of bcc-�� ferrite and fcc-�� austenite are also introduced by selective Mn evaporation. A direct correlation between the generated microstructure and achieved mechanical and shape memory properties is found.

引用

页数：8

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