DEFORMATION AND FRACTURE PROCESSES IN CALCIUM FLUORIDE SINGLE CRYSTALS
DEFORMATION AND FRACTURE PROCESSES IN CALCIUM FLUORIDE SINGLE CRYSTALS
复制标题
DOI：
10.1111/j.1151-2916.1961.tb13713.x
复制
发表时间：
1961-01-01
影响因子：
3.9
通讯作者：
PHILLIPS, WL
中科院分区：
文献类型：
--
作者：
PHILLIPS, WL
在25℃~ 1000℃的温度范围内，研究了氟化钙单晶的压缩塑性性能。在400℃以上，晶体表现出明显的延展性。根据公式t = t0e+K/ t，临界分解剪应力t随绝对温度t而减小。随着温度的升高，加工硬化速率迅速下降，但即使接近熔点，加工硬化速率也保持相对较高的值。空气退火的晶体比空裂晶体更硬。与（111）平面垂直于施加应力的晶体比（110）平面垂直于施加应力的晶体硬化得慢。位错密度随应变线性增加。观察（100）、（110）和（111）例骨折。
The plastic properties of calcium fluoride single crystals tested in compression were investigated in the temperature range 25° to 1000°C. Above 400° C., the crystals showed appreciable ductility. The critical resolved shear stress, t, decreased with absolute temperature,T, according to the equation t = t0e+K/T. The rate of work‐hardening decreased rapidly as the temperature increased but retained a relatively high value even as the melting point was approached. Air‐annealed crystals were harder than as‐cleaved crystals. Crystals with a (111) plane normal to the applied stress hardened less rapidly than crystals with a (110) plane normal to the applied stress. The dislocation density increased linearly with strain. (100), (110), and (111) fractures were observed.