热等静压处理对超低温Ti-5Al-2.5SnELI合金铸造组织与性能的影响  

Effect of HIP Treatment on Microstructure and Properties of Ti-5Al-2.5SnELI Alloy

作　　者：史昆[1] 谢华生[1] 赵军[1] 张春辉[1] 刘时兵[1] 游涛[1] 刘宏宇[1] 闫平[1] 

机构地区：[1]沈阳铸造研究所,辽宁沈阳110022

出　　处：《铸造》2009年第7期659-661,共3页Foundry

摘　　要：研究了热等静压处理对Ti-5Al-2.5SnELI合金铸造组织、抗拉性能、冲击性能的影响。试验结果表明,热等静压处理使铸态的柱状晶粒转变为等轴晶粒,并且使位错发生运动,缠结中的位错重新组合,位错密度下降,内应力得到释放,导致强度下降,塑性提高,冲击性能提高。The study was carried out to investigate the effects of HIP treatment on microstructure, tensile and impact properties of Ti-5Al-2.5SnELI alloy. The results show that the HIP treatment make columnar grain change to equiaxed grain, and the movement occurs in dislocation, the rearrangement of the tangling dislocation reduces the dislocation density and makes the internal stress released, which results in the reduction of strength and the improvement of plastic and impact properties of the alloy.

关 键 词：超低温 Ti-5Al-2.5SnELI 热等静压 组织 性能 

分 类 号：TG113[金属学及工艺—物理冶金]