TY - JOUR
T1 - Micromechanical study of strengthening mechanisms for Ti65(AlCrNb)35 medium-entropy alloy
AU - Yu, Chi Hua
AU - Huang, Guan Hua
AU - Huang, Wei Tang
AU - Huang, Chang Wei
AU - Lo, Yu Chieh
AU - Hung, Zih Jie
AU - Liao, Yu Chin
AU - Jang, Jason Shian Ching
AU - Hu, Hsuan Teh
N1 - Funding Information:
The authors acknowledge the financial support of the Ministry of Science and Technology (MOST 109-2224-E-008-001, MOST 109-2222-E-006-005-MY2, and MOST 109-2221-E-009-058), Taiwan. The authors are also grateful to the National Center for High-performance Computing for providing computational resources. CHY and CWH would like to thank Simutech Solution Corporation for sponsoring the Abaqus license. CHY would like to thank Prof. C.S. David Chen for his generous support. We would like to thank Uni-edit (www.uni-edit.net) for editing and proofreading this manuscript.
Funding Information:
The authors acknowledge the financial support of the Ministry of Science and Technology (MOST 109-2224-E-008-001 , MOST 109-2222-E-006-005-MY2 , and MOST 109-2221-E-009-058 ), Taiwan. The authors are also grateful to the National Center for High-performance Computing for providing computational resources. CHY and CWH would like to thank Simutech Solution Corporation for sponsoring the Abaqus license. CHY would like to thank Prof. C.S. David Chen for his generous support. We would like to thank Uni-edit ( www.uni-edit.net ) for editing and proofreading this manuscript.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - Metal solutions, such as high- and medium-entropy alloys, exhibit extraordinary mechanical performance in comparison to regular alloys. In this study, we employ a crystal plasticity finite element model (CPFEM) to study the strengthening mechanisms of a new medium-entropy alloy, Ti65(AlCrNb)35. A 3D representative model is constructed by processing experimental results for Ti65(AlCrNb)35, such as average grain size, grain size distribution, and initial texture, using the open-source software Dream.3D. The constitutive law for the grains is described by the crystal plasticity and implemented in Abaqus user-defined material (UMAT). The results of uniaxial tensile tests are utilized to calibrate the required parameters in the CPFEM. Strengthening effects resulting from the grain size, strain rate, and cyclic loading for Ti65(AlCrNb)35 are investigated by performing numerical simulations based on the proposed computational framework. Numerical simulation results show that the yield strength increases with decreasing initial grain size, which agrees well with experimental observations of the Hall–Petch effect. In addition, the rate-dependent yield stress increases as the applied strain rate increases in the tensile tests. Moreover, the cyclic loading results demonstrate the isotropic hardening behaviors and the saturation of yielding strength when the maximum strain reaches 10%. Finally, we discuss the contributions of different strengthening mechanisms on the yield strength of Ti65(AlCrNb)35 under different load conditions.
AB - Metal solutions, such as high- and medium-entropy alloys, exhibit extraordinary mechanical performance in comparison to regular alloys. In this study, we employ a crystal plasticity finite element model (CPFEM) to study the strengthening mechanisms of a new medium-entropy alloy, Ti65(AlCrNb)35. A 3D representative model is constructed by processing experimental results for Ti65(AlCrNb)35, such as average grain size, grain size distribution, and initial texture, using the open-source software Dream.3D. The constitutive law for the grains is described by the crystal plasticity and implemented in Abaqus user-defined material (UMAT). The results of uniaxial tensile tests are utilized to calibrate the required parameters in the CPFEM. Strengthening effects resulting from the grain size, strain rate, and cyclic loading for Ti65(AlCrNb)35 are investigated by performing numerical simulations based on the proposed computational framework. Numerical simulation results show that the yield strength increases with decreasing initial grain size, which agrees well with experimental observations of the Hall–Petch effect. In addition, the rate-dependent yield stress increases as the applied strain rate increases in the tensile tests. Moreover, the cyclic loading results demonstrate the isotropic hardening behaviors and the saturation of yielding strength when the maximum strain reaches 10%. Finally, we discuss the contributions of different strengthening mechanisms on the yield strength of Ti65(AlCrNb)35 under different load conditions.
UR - http://www.scopus.com/inward/record.url?scp=85111331790&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85111331790&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2021.107275
DO - 10.1016/j.intermet.2021.107275
M3 - Article
AN - SCOPUS:85111331790
SN - 0966-9795
VL - 137
JO - Intermetallics
JF - Intermetallics
M1 - 107275
ER -