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论文类型： 期刊论文

发表时间： 2009-11-25

发表刊物： MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录刊物： SCIE、EI、Scopus

卷号： 526

期号： 1-2

页面范围： 7-10

ISSN号： 0921-5093

关键字： Magnesium alloys; Alloying; Mechanical properties; Microstructure

摘要： Four alloying principles of magnesium alloys are reported and Mg-2.0 (at.%) Ga alloys are investigated. The results show that microstructure of solution treatment Mg-2.0Ga alloy consists of alpha-Mg dissolved Ga element and intermetallic compound Mg(5)Ga(2) distributed discontinuously at grain boundary. After aging for 128 h a quantity of tiny Mg(5)Ga(2) precipitates with empty set50 nm present homogenously in alpha-Mg of which the crystal parameters (especial c/a) is lower than those in pure Mg. And tiny alpha-Mg grains with 100 nm are observed in Mg-2.0Ga alloy aged for 128 h. The ultimate tensile strength, yield strength and elongation of Mg-2.0Ga alloys aged for 0.5 h and 128 h are 180.939 MPa and 196.85 MPa, 107.405 MPa and 150.898MPa, and 8.19815% and 4.69937%, respectively. The results show that the principles are effective. (C) 2009 Elsevier B.V. All rights reserved.