A Neutron Diffraction Study on Work-Hardening Mechanism for a Pearlite Steel
A Neutron Diffraction Study on Work-Hardening Mechanism for a Pearlite Steel
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珠光体钢加工硬化机理的中子衍射研究
DOI：
10.2472/jsms.53.772
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Kamiyama
中科院分区：
文献类型：
--
作者：
A. Kanie;Y. Tomota;Tetsuya Suzuki;S. Torii;A. Moriai;N. Minakawa;Y. Morii;T. Kamiyama
本文用中子衍射、飞行时间（TOF）和角色散（AD）方法研究了珠光体钢的加工硬化和各成分平均内应力，即所谓的“相应力”。由TOF法得到的总的衍射轮廓表明，Feirite（122）和Feirite（110）峰是较好的，用于在拉伸试验过程中使用AD法的原位中子衍射。塑性变形开始后，珠光体和铁素体之间存在明显的应力分配，珠光体组织的高加工硬化是由于相应力的产生。研究了铁素体块体取向对拉伸变形后残余相应力的影响。然后，在几个类的非均匀塑性流动的推测，这使得复杂的估计在每个组成部分的应力从（hkl）点阵平面应变测量。
The work hardening and the internal stress averaged in each constituent, so called “phase stress” in a pearlite steel were studied by means of neutron diffraction techniques, time-of-flight (TOF) and angler dispersion (AD) methods. The overall diffraction profiles obtained by the TOF method indicates that the cementite (122) and feirrite (110) peaks are preferable to be employed for the in situ neutron diffraction with the AD method during tensile testing. The stress partitioning between cementite and ferrite after the onset of plastic deformation is evidently found. Hence, the high work-hardening of the pearlite structure is demonstrated to be caused by the generation of phase stress. The influence of ferrite block orientation on the residual phase stress after tensile deformation is shown. Then, the heterogeneous plastic flow at several classes is speculated, which makes complicate to estimate the stress in each constituent from (hkl) lattice plane strains measured.