固态及半固态LY11合金加工图  

Processing Maps of Solid and Semi-solid LY11 Alloy

作　　者：余小鲁[1] 冒国兵[1] 

机构地区：[1]安徽工程大学安徽省高性能有色金属材料重点实验室

出　　处：《特种铸造及有色合金》2011年第7期623-625,共3页Special Casting & Nonferrous Alloys

基　　金：安徽省高等学校省级自然科学基金研究项目( KJ2009B134);安徽工程大学科研启动基金项目(2008YQ007);安徽工程大学青年基金项目(2007YQ008zd)

摘　　要：根据动态材料模型,建立了固态及半固态LY11合金的加工图。利用加工图确定了试验材料热变形的流变失稳区。结果表明,半固态成形时的流变失稳区范围大于固态成形时的失稳区范围,且与应变速率有关。此外,获得了等温压缩试验参数范围内的热变形最佳工艺参数。半固态加工最佳工艺参数是加热温度为560℃,应变速率为0.0010s-1,固态加工最佳工艺参数是加热温度为400℃,应变速率为0.0010s-1。Based on the dynamic material model, the processing maps of LY11 alloy in the solid state and in semi-solid state were established. The instability zones of flow behavior were recognized by the maps. The results show that the instability zone during semi-solid forming process is more sensitive to strain rate than that of solid forming process. In addition, optimized processing parameters in the temperature range and different strain rates were presented by the maps. The optimized parameters are as follows： heating temperature of 560℃, strain rate of 0.001s^-1 under semi-solid forming conditions, and heating temperature of 400 ℃ and strain rate of 0.001s^-1 under solid forming conditions.

关 键 词：LY11合金 半固态 加工图 工艺参数 

分 类 号：TG146.21[一般工业技术—材料科学与工程]