TY - JOUR

T1 - Shape recovery performance of a (V, C)-containing Fe-Mn-Si-Ni-Cr shape memory alloy fabricated by laser powder bed fusion

AU - Ferretto, I.

AU - Kim, D.

AU - Mohri, M.

AU - Ghafoori, E.

AU - Lee, W. J.

AU - Leinenbach, C.

N1 - Funding Information: The work is funded by the Swiss National Science Foundation (SNSF) through the project IZKSZ2_188290/1 and the National Research Foundation of Korea (NRF) under the grant number 2019K1A3A1A14065695 , which is gratefully acknowledged. The authors thank Boehler Edelstahl for providing the alloy powder. Publisher Copyright: © 2022 The Author(s).

PY - 2022/9

Y1 - 2022/9

N2 - In the present work, a Fe-Mn-Si shape memory alloy containing V and C has been fabricated by laser powder bed fusion for the first time. A pronounced pseudo-elasticity compared to a similar alloy but conventionally manufactured is achieved after aging treatment, as a result of the fine microstructure developed during the process and of the evaporation of Mn. The formation of high precipitate densities is also responsible for the improved thermo-mechanical properties. The size and density of precipitates significantly vary with aging conditions and account for important variation in material's performance. A maximum pseudo-elasticity is observed in samples aged at 750 °C for 6 h. The recovery strain upon unloading exceeds the values achieved in the conventionally manufactured alloy by more than 50%.

AB - In the present work, a Fe-Mn-Si shape memory alloy containing V and C has been fabricated by laser powder bed fusion for the first time. A pronounced pseudo-elasticity compared to a similar alloy but conventionally manufactured is achieved after aging treatment, as a result of the fine microstructure developed during the process and of the evaporation of Mn. The formation of high precipitate densities is also responsible for the improved thermo-mechanical properties. The size and density of precipitates significantly vary with aging conditions and account for important variation in material's performance. A maximum pseudo-elasticity is observed in samples aged at 750 °C for 6 h. The recovery strain upon unloading exceeds the values achieved in the conventionally manufactured alloy by more than 50%.

KW - Laser powder bed fusion

KW - Microstructure

KW - Precipitation

KW - Pseudo-elasticity

KW - Shape memory alloys

UR - http://www.scopus.com/inward/record.url?scp=85140079731&partnerID=8YFLogxK

U2 - 10.1016/j.jmrt.2022.08.143

DO - 10.1016/j.jmrt.2022.08.143

M3 - Article

AN - SCOPUS:85140079731

VL - 20

SP - 3969

EP - 3984

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

SN - 2238-7854

ER -