Inelastic deformation of metallic glasses under dynamic cyclic loading

SCRIPTA MATERIALIA

卷:194

Article

Duan, Y. J.^1,2  Qiao, J. C.¹  Wada, T.³  Kato, H.³  Wang, Y. J.^4,5  Pineda, E.²  Crespo, D.² 

[1] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China

[2] Univ Politecn Cataluna, Inst Energy Technol, Dept Phys, Barcelona 08019, Spain

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[5] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China

关键词: High-entropy metallic glass;    Flow defects;    Free-volume zones;    Inelastic deformation;   

DOI  :  10.1016/j.scriptamat.2020.113675

来源: Elsevier

【 摘 要 】

Dynamic mechanical analysis was performed in two metallic glasses that show markedly distinct beta relaxation features. The confined flow defects of free-volume zones and the inelastic deformation behavior result into a significant mechanical hysteresis loop in dynamic cyclic loadings, which is described with a viscoelastic model. Annealing below the glass transition temperature T-g decreases the concentration of free-volume zones. The understanding of the inelastic deformation, which is related to free-volume zones, is critical and may provide a new avenue into the mechanical properties' improvement of high entropy metallic glasses. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free