Elastic modulus change and its relation with glass-forming ability and plasticity in bulk metallic glasses. (1st March 2019)

• Record Type: Journal Article
• Authors: Yang, Ming; Liu, Xiongjun; Wu, Yuan; Wang, Hui; Wang, Jianbiao; Ruan, Haihui; Lu, Zhaoping
• Is Part Of: Scripta materialia. Number 161(2019)
• Page Start: 62
• Page End: 65
• Publication Date: 2019-03-01
• Subjects: Metallic glasses -- Modulus change -- Atomic relaxation -- Softening rate -- Room-temperature plasticity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.10.006
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this work, we revealed the intrinsic relation between the modulus change upon heating and macroscopic properties such as glass-forming ability (GFA) and room-temperature plasticity in various metallic glasses. Specifically, GFA and plasticity can respectively be related to the softening rate right above the glass transition temperature ( T g ) and the degree of sub- T g relaxation. These relations can be understood in terms of the unified picture of potential energy barrier crossing. Above T g, the faster barrier crossing leads to the larger softening rate and the higher tendency of crystallization; below T g, the easier local rearrangement brings about the larger plasticity. Graphical abstract: