摘要
喷雾沉积法制造的ＳｉＣＰ／ＬＹ１２复合材料经热压和热正挤压后，晶粒得以细化，ＳｉＣＰ分布的均匀性大大改善。超塑性拉伸试验结果表明：ＳｉＣＰ／ＬＹ１２复合材料具有超塑性；变形温度、应变速率对极限延伸率和应变速率敏感性指数ｍ值均有较大的影响。在变形温度为５００℃和初始应变速率为１．０×１０－３ｓ－１时，获得的极限延伸率为３４５％。
The superplasticity of aluminum matrix fabricated by spray atomization and co deposition was investigated. Before superplastic deformation, the pretreatment of hot compress and hot forward extrusion was utilized. Fine grains and uniformly distributed SiC P in SiC P/LY12 composite are observed. The results of superplastically uniaxial tension show that the SiC P/LY12 composite has good superplasticity and the limit elongation and m value are greatly affected by the temperature and strain rate. Moreover, the limit elongation is 345% in this composite with 500℃ of temperature and 1.0×10 -3 s -1 of initial strain rate.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1996年第4期25-29,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金
航空科学基金
陕西省自然科学基金
关键词
铝基
复合材料
喷雾沉积法
超塑性变形
aluminum matrix composite, spray atomization and co deposition, superplastic deformation, elongation
