PRECIPITATION HARDENING OF MG-ZN AND MG-ZN-RE ALLOYS

被引:268
作者
WEI, LY
DUNLOP, GL
WESTENGEN, H
机构
[1] UNIV QUEENSLAND, DEPT MIN & MET ENGN, ST LUCIA, QLD 4072, AUSTRALIA
[2] UNIV QUEENSLAND, CAST, ST LUCIA, QLD 4072, AUSTRALIA
[3] NORSK HYDRO AS, RES CTR PORSGRUNN, DEPT MAGNESIUM MAT TECHNOL, N-3901 PORSGRUNN, NORWAY
来源
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 07期
关键词
D O I
10.1007/BF02670757
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The age-hardening response of two cast Mg-Zn-RE alloys has been investigated and compared with that of a binary Mg-Zn alloy. The microstructures of the aged specimens were examined by analytical electron microscopy. Formation of a fine dispersion of rodlike beta(1)' precipitates is the main cause for age hardening, while extensive precipitation of disc-shaped beta(2)' coincides with the onset of overaging. Rare earth additions retard the formation of beta(2)' precipitates and thus postpone overaging. Four different orientation relationships between beta(2)' precipitates and matrix were found and explained in terms of the near-CSL model.
引用
收藏
页码:1705 / 1716
页数:12
相关论文
共 22 条
[11]   MAIN FACTORS AFFECTING AGING OF MAGNESIUM-ZINC ALLOYS [J].
MIMA, G ;
TANAKA, Y .
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1971, 12 (02) :76-&
[12]   GRAIN SIZE DEPENDENCE OF YIELD STRESS AND FLOW STRESS IN AGE-HARDENED MAGNESIUM-ZINC ALLOY [J].
MIMA, G ;
TANAKA, Y .
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1971, 12 (05) :317-&
[13]   AGING CHARACTERISTICS OF MANGESIUM-4 WT PERCENT ZINC ALLOY [J].
MIMA, G ;
TANAKA, Y .
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1971, 12 (02) :71-&
[14]   MECHANISM OF PRECIPITATION HARDENING OF MAGNESIUM-ZINC ALLOYS [J].
MIMA, G ;
TANAKA, Y .
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1971, 12 (05) :323-&
[15]  
NAYEBHASHEMI AA, 1988, B ALLOY PHASE DIAGRA, V9, P162, DOI DOI 10.1007/BF02890557
[16]   THE CRYSTALLOGRAPHY OF SECONDARY CARBIDE PRECIPITATION IN HIGH-SPEED STEEL [J].
RONG, W ;
DUNLOP, GL .
ACTA METALLURGICA, 1984, 32 (10) :1591-1599
[17]  
STURKEY L, 1959, J I MET, V88, P177
[18]  
SUSEELAN NK, 1988, MATER SCI FORUM, V30, P89
[19]  
WEI LY, 1989, NEW MATERIALS PROCES, P721
[20]  
WEI LY, 1993, UNPUB