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A Study on Commercial Pure Al (1050) After Cold Rolling at Room Temperature With Various Deformations Using Positron Annihilation

机译:利用正电子An没技术研究室温下冷轧各种变形的商品纯Al(1050)

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摘要

Positron annihilation lifetime (PAL), Doppler broadening (DB), and Vickers microhardness measurements (Hv) were performed to study the isochronal annealing of commercial pure Al (1050) in the temperature range from room temperature (RT) to 823 K after cold rolling at RT with various deformations of 16 percent, 37 percent, and 54 percent. PAL measurements show a decrease in the average lifetime of positron (tau_(av)) followed by saturation at 190 ps as a function of annealing temperature. The results of Doppler broadening of annihilation radiation (S and W parameters) are found to be consistent with PAL measurements. The correlation between the characteristics of positron annihilation and Hv shows three annealing stages of micro-structure in commercial Al, which are attributed to recovery, partial recrystallization, and complete recrystallization.
机译:进行正电子ni没寿命(PAL),多普勒展宽(DB)和维氏显微硬度测量(Hv),以研究商品纯Al(1050)在室温(RT)至823 K的温度范围内的等时退火。在室温下,各种变形分别为16%,37%和54%。 PAL测量结果显示,正电子的平均寿命(tau_(av))下降,然后在190 ps时达到饱和,这是退火温度的函数。发现an灭辐射的多普勒展宽的结果(S和W参数)与PAL测量结果一致。正电子an没特性与Hv之间的相关性表明,商品铝中的三个微观退火阶段分别归因于回收率,部分重结晶和完全重结晶。

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