Diffraction Plane Dependence of Elastic Constants in Ferritic Steel in Neutron Diffraction Stress Measurement.
Diffraction Plane Dependence of Elastic Constants in Ferritic Steel in Neutron Diffraction Stress Measurement.
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中子衍射应力测量中铁素体钢弹性常数的衍射面依赖性。
DOI：
10.2472/jsms.44.1115
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
J. Root
中科院分区：
文献类型：
--
作者：
M. Hayashi;M. Ishiwata;N. Minakawa;S. Funahashi;J. Root
已经进行了中子衍射测量来研究铁素体钢中弹性常数的衍射平面依赖性。测量的衍射平面为110、220、112、222和200。在测量中，将一个小的拉伸样品加载到专门为中子衍射仪设计的拉伸试验台中。五个衍射平面获得的应变几乎与所施加的应力成比例地增加，高达 230MPa，几乎相当于屈服应力。 110、220 和 112 的平均弹性常数分别为 E=243GPa 和 ν=0.28，最软的 200 的平均弹性常数为 182GPa 和 0.31，最硬的 222 的平均弹性常数分别为 268GPa 和 0.30。应变计测得的体积弹性常数 E=222GPa 和 ν=0.29 几乎与 110、220 和 112 的平均值一致。发现 Kroner 弹性模型可以解释铁素体钢的杨氏模量和泊松比的衍射平面依赖性。
Neutron diffraction measurement have been made to investigate the diffraction plane dependence of elastic constants in ferritic steel. The measured diffraction planes were 110, 220, 112, 222 and 200. In the measurement a small tensile specimen was loaded in the tensile test rig specially degsined for a neutron diffractometer. The strains obtained for five diffraction planes increased almost in proportion to the applied stress up to 230MPa nearly equivalent to the yield stress. The mean elastic constants obtained were E=243GPa and ν=0.28 for 110, 220 and 112, 182GPa and 0.31 for softest 200, and 268GPa and 0.30 for stiffest 222, respectively. The bulk elastic constants, E=222GPa and ν=0.29, measured by the strain gauges almost agreed with the mean values for 110, 220 and 112. The Kroner elastic model is found to account for the diffraction plane dependence of Young's modulus and Poisson's ratio of the ferritic steel.