Grain growth in calibre rolled Mg-3Al-1Zn alloy and its effect on hardness

被引：33

作者：

Doiphode, R. L. ^{[1
,2
]}

Murty, S. V. S. Narayana ^{[3
]}

Prabhu, N. ^{[1
]}

Kashyap, B. P. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

[2] Govt Polytech, Dept Mech Engn, Kolhapur 416004, Maharashtra, India

[3] Vikram Sarabhai Space Ctr, ISRO, Special Mat Div, Trivandrum 695022, Kerala, India

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2015年 / 3卷 / 04期

关键词：

Annealing; AZ31; Mg-alloy; Calibre rolling; Twinning; Grain growth;

D O I：

10.1016/j.jma.2015.11.003

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Calibre rolling of Mg-3Al-1Zn alloy at 300 degrees C led to development of fine grain size of 3 mu m. Subsequent annealing, from 5 to 6000 minutes at 300-450 degrees C, revealed faster grain growth initially up to 60 minutes, which became sluggish on prolonged annealing. The time exponent for grain growth kinetics (n) suggests bi-linear behaviour with n = 0.11 and 0.008 over these time scales. The activation energy, based on various n values, varied over wide ranges that made the understanding of the mechanisms for grain growth difficult. This problem is explained by concurrent evolution of texture and grain boundary structure. The effect of grain growth on hardness at ambient temperature was found to follow the H-P type relationship. (C) 2015 Production and hosting by Elsevier B.V. on behalf of Chongqing University.

引用

页码：322 / 329

页数：8

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