摘要
研究了铸态和挤压态Mg-Mn-Zn合金的微观组织、力学性能和在模拟人体体液中的腐蚀行为。结果表明:铸态Mg-Mn-Zn合金的平均晶粒尺寸为300μm;而挤压后Mg-Mn-Zn合金的平均晶粒尺寸降低为9μm。挤压态与铸态Mg-Mn-Zn合金相比,抗拉强度由174.5MPa提高到280.2MPa,屈服强度由43.6MPa提高到246.5MPa,伸长率达到21.6%。铸态Mg-Mn-Zn合金断口呈脆性断裂,挤压态合金为韧性断裂。挤压态Mg-Mn-Zn合金的耐蚀性能也明显高于铸态Mg-Mn-Zn合金。
The microstructure, mechanical properties and the corrosive behavior in simulated body fluid of as-cast and extruded Mg-Mn-Zn alloy were investigated. The results show that the average grain size of as-east Mg-Mn-Zn alloy is 300μm and that of extruded alloy is 9μm. Compared with the as-cast alloy, the tensile strength of the extruded ahoy increases from 174.5MPa to 280.2MPa, the yield strength increases from 43.6MPa to 246.5MPa, and the elongation reaehs about 21.6% . The tensile fracture of as-cast Mg-Mn-Zn alloy is brittle fracture while that of extruded alloys exhibits ductile fracture. The corrosion resistance of the extruded ahoy is also superior to that of as-cast alloy.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2009年第1期114-118,共5页
Transactions of Materials and Heat Treatment
基金
中科院“百人计划项目”,“医用金属植入材料”(AM07-YC13)
关键词
镁合金
挤压
力学性能
模拟体液
腐蚀
magnesium alloy
extrusion
mechanical properties
simulated body fluid
corrosion
