摘要
采用微观分析、机械性能测试及断口分析等方法研究了钕对AZ91-Nd镁合金(w(Nd)=0,0.1%,0.3%,0.5%,1.0%,1.5%)的微观组织和机械性能的影响。结果表明:Nd以固溶和金属间化合物(A l11Nd3)的形式存在时具有细化晶粒、抑制二次β相析出、使不完全离异共晶转化为离异共晶的作用;Nd通过固溶强化、析出强化和细晶强化增加了合金强度和硬度,并改善了塑性;加入Nd后合金的断裂机制从脆性解理断裂转变为准解理断裂。
The microstructure and mechanical properties of as cast AZ91-Nd （neodymium） magnesium alloys were studied by microstructure analysis, mechanical property testing and analysis of fracture surface, where ω （Nd） is 0, 0.1%, 0.3%, 0.5%, 1.0%, 1.5%. The results reveal that the element Nd added into AZ91 exists in the forms of both solid solution and intermetallics Al11Nd3. It has great effects on refining grains of α- Mg and /3-Mg17 A12, depressing the precipitation of secondary β-Mg17 Al12 and transforming the partially divorced eutectic into the fully divorced. Nd effectively improves the tensile strength, ductility and hardness of AZ91 alloy due to the effects of solid-solution strengthening, precipitation strengthening as well as fine-grained strengthening.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第3期289-293,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
吉林省科技发展重大项目(20040315)
关键词
复合材料
镁合金
钕
微观结构
机械性能
composite material
magnesium alloy
neodymium
microstructure
mechanical properties
