Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 523, Issue 1-2, Pages 145-151Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.06.002
Keywords
Magnesium alloys; Zr; Microstructure; Mechanical properties; Corrosion resistance
Categories
Funding
- National Basic Research Program of China [2007CB613701]
- Program of Shanghai Subject Chief Scientist [08XD14020]
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The influence of Zr on the microstructure, mechanical properties and corrosion resistance of Mg-10Gd-3Y (wt.%) magnesium alloy was investigated. The grain size of alloys decreased with Zr content from 0% to 0.93% (wt.%). The addition of Zr greatly improved the ultimate tensile strength (UTS) and the elongation (EL), while slightly improved the tensile yield strength (TYS). The UTS and the EL of the alloy containing 0.93% Zr increased by 125.8 MPa and 6.96% compared with base alloy, respectively. The corrosion resistances were found to decrease with Zr content from 0% to 0.42% and then increase from 0.42% to 0.93%. The differences in the sizes and distributions of the Zr-rich particles have significant effects on the corrosion behaviors. The alloy with 0.42% Zr addition revealed the optimum combination of mechanical properties and corrosion resistance. (C) 2009 Elsevier B.V. All rights reserved.
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