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Orientation Dependent Recovery in Interstitial Free Steel

机译:间隙自由钢中取向依赖的恢复

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Cold rolled (40, 60 and 80% thickness reductions from hot-band) interstitial free (IF) steel samples were recovered at 500°C for different times (15 min to 32 h). The recovery kinetics, studied through a combination of X-ray line profile analysis and high resolution electron diffraction, were best represented by logarithmic relationship. Though the kinetics was dependent on the prior deformation, γ (ND// ) fibre clearly had stronger recovery than θ (ND// ) fibre. Recovery was observed, statistically to create grain interior strain localizations: an orientation independent phenomenon. Increase in misorientation across such strain localizations was, however, orientation dependent. This was responsible for enhanced in-grain misorientation in recovered γ-fibre grains/bands. Extended recovery of 80% pre-deformed samples also led to coarsening of γ-fibre bands: strain induced boundary migration (SIBM) or uniform movement of γ-fibre boundaries into neighbouring non γ-fibre orientations.
机译:在500°C下在不同的时间(15分钟至32小时)回收了冷轧(无热轧带隙(IF)钢样品的厚度减少了40%,60%和80%)。通过X射线线轮廓分析和高分辨率电子衍射相结合研究的恢复动力学最好用对数关系表示。尽管动力学取决于先验的变形,但γ(ND //)纤维的恢复性显然强于θ(ND //)纤维。从统计学上观察到恢复,以产生晶粒内部应变局部化:与取向无关的现象。但是,在这样的应变位置上,取向错误的增加与取向有关。这是造成回收的γ纤维晶粒/带中晶粒取向错误增强的原因。 80%的预变形样品的延长回收还导致γ纤维带的变粗:应变诱导边界迁移(SIBM)或γ纤维边界均匀移动到相邻的非γ纤维方向。

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