Physical Aging of Zr65Cu17.5Ni10Al7.5 Glassy Alloy

International Conference on Design and Application of Engineering Materials in conjunction with Seminar Nasional Metalurgi dan Material XI (SENAMM)

材料科学;金属学

Aji, Daisman P.B.^1 ; Triyono^1 ; Mujalis, Yusep^1

Department of Mechanical Engineering, Universitas Trisakti, Jl. Kyai Tapa 1, Grogol, Jakarta

11440, Indonesia^1

关键词: Annealing time;    Glassy alloys;    Johari-Goldstein relaxation;    Non-exponential kinetics;    Physical aging;    Scan data;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/547/1/012036/pdf
DOI  :  10.1088/1757-899X/547/1/012036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Physical aging of Zr65Cu17.5Ni10Al7.5 glassy alloy has been studied after holding its samples with variation of time and temperature of annealing. The results showed that the enthalpy and entropy decreased with time according to a non-exponential kinetics. The Differential Scanning Calorimetry (DSC) heating scan after annealing was analyzed using Tool-Narayanaswamy-Moynihan (TNM) model. The analysis showed that a set of parameters that fitted the heating scan data for one annealing time did not fit the heating scan data for another annealing time. This is explained due to approximations used in the model and the effect of Johari-Goldstein (JG) relaxation to the physical aging.