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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Positron annihilation in polycrystalline iron deformed by uniaxial tension
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Positron annihilation in polycrystalline iron deformed by uniaxial tension

机译：单轴拉伸变形的多晶铁中的正电子an没

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摘要

Angular distributions of positron annihilation quanta, positron lifetime and resistivity were measured for polycrystalline iron samples deformed by uniaxial tension up to different deformation degrees. The S parameter as a function of the W parameter has been determined. The data obtained for iron samples elongated up to different elongation degrees indicate that in the proportionality and limited proportionality regions the changes in the physical properties of iron are governed mainly by generation of vacancies and formation and kinetics of transformations of vacancy clusters occurring first of all on the grains of monocrystallites. In the region of plastic deformations the dominant defects are dislocations and vacancies and their aggregates generated due to the formation and movement of the dislocation of the primary and secondary slip. The positron annihilation datas are corroborated by the results of the resistometric and tensometric measurements in the proportionality and limited proportionality regions.
机译：测量了单轴拉伸变形至不同变形程度的多晶铁样品的正电子an没角分布，正电子寿命和电阻率。已经确定了S参数作为W参数的函数。铁样品拉伸至不同伸长度所获得的数据表明，在比例和有限比例区域中，铁的物理性质变化主要受空位的产生以及空位团簇转化的形成和动力学的控制。单晶的晶粒。在塑性变形区域，主要缺陷是位错和空位及其聚集，这是由于第一和第二滑动的位错的形成和运动而产生的。正比an灭数据通过比例和有限比例区域中的电阻测量和张力测量的结果得到了证实。

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