摘要
研究不同保温时间和制粉方法对热等静压TA15钛合金的微观组织、拉伸性能和拉伸断口形貌的影响。结果表明:粉末TA15钛合金组织由等轴α-Ti、层状α-Ti和少量β-Ti组成。热等静压保温时间为20min时粉末TA15钛合金已达到致密,随着保温时间延长到120min组织逐渐均匀长大。采用等离子旋转电极法的粉末TA15钛合金的拉伸性能优于惰性气体雾化粉末TA15钛合金。拉伸断裂模式为韧性断裂,断口微观形貌为韧窝。
The effects of holding time and pre-alloyed powder manufacturing methods on microstructure,tensile properties and tensile fracture morphology was investigated for powder metallurgy(PM)TA15 alloys.In this work,hot isostatic pressing(HIPing)technique was used to densify the TA 15 pre-alloyed powder.The results show that the microstructure of PM TA 15 alloys is composed of equiaxed α grains,lamellas α grains and a little β grains.When the holding time is 20 min during HIPping,the PM TA15 alloys have gotten full densification.As the holding time extends to 2 h,the microstructure became coarser.The tensile properties of PM TA 15 alloys with plasma rotating electrode process powder are better than those of PM TA 15 alloys with gas atomization powder.The tensile fracture mode is ductile fracture,and fracture morphology appearance is the dimple.
作者
徐正
张绪虎
徐桂华
XU Zheng;ZHANG Xuhu;XU Guihua(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2021年第1期76-80,共5页
Aerospace Materials & Technology
关键词
热等静压
TA15
微观组织
拉伸性能
拉伸断口形貌
Hot isostatic pressing
TA 15
Microstructure
Tensile properties
Tensile facture morphology
