摘要
The dimensional change,residual stress,grain orientation difference,dislocation density,and dislocation distribution of beryllium after different hot isostatic pressing treatments were analyzed by laser length meter,Raman spectrometer,nanoindentation meter,electron backscattered diffractometer,and transmission electron microscope,and the influence of thermal-cold cycling treatment on the dimensional stability of beryllium was analyzed.Results show that the size of the hot isostatic pressed beryllium tends to be stable after 6 cycles of thermal-cold cycling treatment from-100℃to 150℃,and it has good dimensional stability.The dimensional stabilization mechanism of beryllium is mainly the homogenization of dislocations within the grain and the homogenization of orientation difference caused by micro-plastic deformation.
利用激光测长仪、拉曼光谱仪、纳米压痕仪、背散射衍射电镜以及透射电镜分析不同处理状态等静压铍材的尺寸变化、残余应力、晶粒取向差、位错密度及位错分布形态,分析冷热循环处理对铍材尺寸稳定性的影响。结果表明,热等静压铍材在-100~150℃冷热循环6次后尺寸趋于稳定,具有良好的尺寸稳定性。冷热循环处理过程中铍材尺寸稳定化机制主要是晶粒内位错均匀化及微塑性变形导致取向差均匀化。
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第10期2718-2722,共5页
Rare Metal Materials and Engineering
基金
National Defense Basic Scientific Research Program of China(JCKY2018203B067)
Youth Natural Science Foundation of Hunan Province(2019JJ50817)。
