Elastic Stiffness Coefficients of Iron from 77° to 673°K
Elastic Stiffness Coefficients of Iron from 77° to 673°K
复制标题
铁的弹性刚度系数从 77°K 到 673°K
DOI：
--
复制
发表时间：
1965
期刊：
影响因子：
--
通讯作者：
D. N. Beshers
中科院分区：
文献类型：
--
作者：
A. E. Lord;D. N. Beshers
用超声脉冲回波技术测量了单晶铁在室温(300°K)和液氮(77°K)温度下的弹性刚度系数。这三个系数是从总共七个独立的模式中确定的。在300°K时，C_(11)=2.28±0.02，C_(12)=1.32±0.04，C_(44)=1.165±0.01，单位为1012dyn/cm~2；在77°~673°K温度范围内测得铁的系数C11，(C11+C12+2C44)/2和(C11+2C12+4C44)/3，以及多晶硬度λ+2μ与温度成线性关系，C11和(C11+2C12+4C44)/3与温度成线性关系，不能确定(C11+C12+2C44)/2中是否存在同样的影响，因为数据中有明显的散射。
The elastic stiffness coefficients of single‐crystal iron have been measured at room (300°K) and liquid‐nitrogen (77°K) temperatures using the ultrasonic pulse‐echo technique. The three coefficients were determined from a total of seven independent modes. The values at 300°K are C11=2.28±0.02, C12=1.32 ±0.04, and C44=1.165±0.01, in units of 1012 dyn/cm2; the corresponding values at 77°K are 2.36±0.02, 1.34±0.04, and 1.19±0.01.The coefficients C11, (C11+C12+2C44)/2, and (C11+2C12+4C44)/3 of iron have been measured from 77° to about 673°K. C11 and (C11+2C12+4C44)/3, as well as the polycrystalline stiffness λ+2μ, depart from a linear dependence on temperature above about 300°C. It was not possible to say whether the same effect occurred in (C11+C12+2C44)/2 because of significant scatter in the data.The Debye temperature Θ0 was found from the stiffnesses extrapolated to 0°K, to be 471.5°K.