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

页码：1705 / 1716

页数：12