Probing the role of Johari–Goldstein relaxation in the plasticity of metallic glasses

Autor:	M. Zhang, Y. Chen, R. G. He, S. F. Guo, J. Ma, L. H. Dai
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Metallic glasses Johari–Goldstein relaxation plasticity nanoindentation Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 9, Pp 383-391 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2019.1620360
Popis:	Johari–Goldstein (JG) relaxation closely relates to the shear transformation zones (STZs) in the flow of metallic glasses (MGs). However, the actual role played by JG relaxation in the STZ-evoked plastic deformation of MGs remains unknown. In this work, by substituting the transition metal (TM) element in La(TM)Al MGs (TM = Ni, Co, Cu, CuNi) to tune the feature of JG relaxation, how JG relaxation alters the deformation behaviors of MGs is tentatively examined with nanoindentation. The results demonstrate that JG relaxation modulates the anelastic to plastic transition rate in the plastic deformation accommodation of MGs via a characteristic relaxation time.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/e9cc2fc963af4761bbff099bd6867905 Zobrazit plný text záznamu View record in DOAJ