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首页> 外文期刊>Journal of Materials Engineering and Performance >Heterogeneity and Homogeneity in 2/4 N Multilayered Al Fabricated by Accumulative Roll Bonding and Annealing
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Heterogeneity and Homogeneity in 2/4 N Multilayered Al Fabricated by Accumulative Roll Bonding and Annealing

机译：通过累积辊粘合和退火制造的2/4 n多层Al中的异质性和均匀性

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摘要

Multilayered Al sheets having alternative stacking of 2 N Al (99.21 wt.% purity, N is short for nine) and 4 N Al (99.993 wt.% purity, N is short for nine) with various layer thicknesses from 16 to 1 mu m were fabricated by 6 to 10 accumulative roll bonding (ARB) cycles, followed by annealing. The effects of layer thickness and annealing treatment on mechanical properties were studied. In all samples, the grain sizes in the 4 N layers were larger than those in the 2 N layers due to the purity difference. The grain size and mechanical properties saturated after 6 ARB cycles, but the layer thickness gradually decreases with increasing cycles and accordingly, more homogeneous microstructures were obtained with higher cycles. After annealing, heterogeneous structures were retained in 6-cycle sample, while most homogenous structures were observed in 10-cycle sample. Yield-drop phenomenon widely observed in the homogeneous samples disappeared in the heterogeneous 6-cycle sample after annealing at 225 and 250 degrees C.
机译：具有2nAl（99.21重量％的纯度，n的含有替代堆叠的多层铝片，九个）和4 n al（99.993重量％纯度，n短为九个），各层厚度为16至1μm由6至10累积辊粘合（ARB）循环制成，然后退火。研究了层厚度和退火处理对机械性能的影响。在所有样品中，由于纯度差异，4 n层中的晶粒尺寸大于2N层中的颗粒尺寸。晶粒尺寸和机械性能在6次循环后饱和，但是层厚度随着循环的增加逐渐减小，因此，用更高的循环获得更均匀的微观结构。退火后，在6个循环样品中保留异质结构，而在10个循环样品中观察到大多数均匀结构。在225和250℃下退火后，在均相样品中广泛观察到均匀样品中广泛观察到的产量下降现象消失。

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