Change in electrical resistivity of commercial purity aluminium severely plastic deformed
Change in electrical resistivity of commercial purity aluminium severely plastic deformed
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DOI：
10.1080/14786435.2010.510453
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发表时间：
2010-01-01
影响因子：
1.6
通讯作者：
Tsuji, Nobuhiro
中科院分区：
文献类型：
--
作者：
Miyajima, Yoji;Komatsu, Shin-Ya;Tsuji, Nobuhiro
工业纯铝板在累积辊粘接过程中存在严重的塑性变形。在77 K时，ARB过程中电阻率和微观结构的变化被追踪到12个循环，这相当于10个等效应变。在77 K时，电阻率随ARB循环次数的增加而增加，在第6次ARB循环后达到饱和状态，初始材料的电阻率最大增量约为1.1 n m。由于晶格缺陷会影响金属的电阻率，因此使用Ham's方法通过扫描透射电子显微镜图像和电子背散射衍射获得的晶界图来评估内部位错密度和晶界密度。分别。讨论了电阻率变化与晶格缺陷之间的关系。
Commercial purity aluminium sheets were severely plastic deformed by accumulative roll bonding (ARB). Changes in electrical resistivity at 77 K and microstructure during the ARB process were traced up to 12 cycles, which corresponded to an equivalent strain of 10. The resistivity at 77 K increased with increasing number of ARB cycles, then saturated after about the sixth ARB cycle with a maximum increment of resistivity from starting material of about 1.1 n m. Since lattice defects affect the resistivity of metals, the internal dislocation density and the density of grain boundaries were evaluated from scanning transmission electron microscopy images using Ham's method and grain boundary maps obtained from electron back-scattering diffraction, respectively. The relationship between the change in resistivity and the lattice defects is discussed.