Age Hardening and Microstructure of ZA84 Magnesium Alloy with the Combined Addition of Cr and Bi. Issue 1 (January 2018)

• Record Type: Journal Article
• Authors: Jie, Ye; Xiaoping, Lin; Yun, Dong; Fei, Teng; Guifang, Sun; Jie, Han
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 1(2018)
• Page Start: 39
• Page End: 42
• Publication Date: 2018-01
• Subjects: ZA84-0.2Cr-0.5Bi alloy -- crystal defect -- age hardening -- strengthening phase; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30068-7
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The age hardening and microstructure of ZA84 magnesium alloy with the combined addition of Cr and Bi was studied by SEM and HRTEM. The results show that a trace amount of Cr and Bi has a significant enhancement effect on the hardness of aging. When the ZA84-0.2Cr-0.5Bi alloy was aged at 160 °C, during the early aging period, the matrix has serious lattice distortion and a large number of crystal defects. The microstructure at the peak aging consists of a large number of rod-like or blocky β′1 -MgZn2 phases and granular Bi2 Mg3 phases, and the peak hardness HV value is 924.8 MPa. When ageing proceed, the precipitates coarsening results in the hardness value reduction.