TY - JOUR
T1 - A novel high-entropy alloy with multi-strengthening mechanisms
T2 - Activation of TRIP effect in C-doped high-entropy alloy
AU - Do, Hyeon Seok
AU - Jang, Tae Jin
AU - Kim, Ki Jeong
AU - Sohn, Seok Su
AU - Lee, Byeong Joo
N1 - Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT of Korea ( 2016M3D1A1023383 and NRF-2022R1A5A1030054 ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/24
Y1 - 2022/11/24
N2 - Efforts have been made to intentionally activate multiple strengthening mechanisms in a single alloy because individual strengthening effects have not been sufficiently exhibited in previous alloys with multi-strengthening mechanisms. Here, we design a novel high-entropy alloy with multi-strengthening mechanisms through a stepwise design approach utilizing CALPHAD type thermodynamic calculation. The target strengthening mechanisms are introduced step by step, from solid solution strengthening, the addition of precipitation hardening and transformation-induced plasticity, based on the calculation. The finally designed Co21Cr11Fe49Mn4Ni4V2C1Mo3Si5 alloy simultaneously benefits from solid solution strengthening due to Mo and V addition, precipitation hardening from nanoscale precipitates, grain boundary strengthening by grain refinement, and transformation-induced plasticity by BCC deformation-induced martensite transformation. Individual strengthening effects is sufficiently exhibited in the designed alloy, which leads to an excellent combination of yield strength (732 MPa), ultimate tensile strength (1100 MPa), and ductility (47.5%).
AB - Efforts have been made to intentionally activate multiple strengthening mechanisms in a single alloy because individual strengthening effects have not been sufficiently exhibited in previous alloys with multi-strengthening mechanisms. Here, we design a novel high-entropy alloy with multi-strengthening mechanisms through a stepwise design approach utilizing CALPHAD type thermodynamic calculation. The target strengthening mechanisms are introduced step by step, from solid solution strengthening, the addition of precipitation hardening and transformation-induced plasticity, based on the calculation. The finally designed Co21Cr11Fe49Mn4Ni4V2C1Mo3Si5 alloy simultaneously benefits from solid solution strengthening due to Mo and V addition, precipitation hardening from nanoscale precipitates, grain boundary strengthening by grain refinement, and transformation-induced plasticity by BCC deformation-induced martensite transformation. Individual strengthening effects is sufficiently exhibited in the designed alloy, which leads to an excellent combination of yield strength (732 MPa), ultimate tensile strength (1100 MPa), and ductility (47.5%).
KW - CALPHAD
KW - Computational design
KW - High-entropy alloys
KW - Multi-strengthening mechanisms
UR - http://www.scopus.com/inward/record.url?scp=85140892977&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.144220
DO - 10.1016/j.msea.2022.144220
M3 - Article
AN - SCOPUS:85140892977
SN - 0921-5093
VL - 859
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
M1 - 144220
ER -