Delaying premature local necking of high-strength Cu: A potential way to enhance plasticity
Delaying premature local necking of high-strength Cu: A potential way to enhance plasticity
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DOI：
10.1016/j.scriptamat.2010.08.049
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发表时间：
2011
影响因子：
6
通讯作者：
Hu-Lin Liu;B. Zhang;Guang-Ping Zhang
中科院分区：
文献类型：
--
作者：
Hu-Lin Liu;B. Zhang;Guang-Ping Zhang
冷轧金属薄板通常具有高强度，但由于局部过早缩颈，塑性较低。在这里，我们揭示了通过较厚的铜和较薄的铝层交替堆叠的层状组织可以有效地提高冷轧铜的拉伸塑性。复合材料中的层界面强烈地抑制和延缓了冷轧铜层早期局部颈缩的发展。提出了一种在不损失强度的情况下提高塑性的潜在途径。
A cold-rolled metal sheet is usually of high strength but low plasticity due to the onset of premature local necking. Here, we reveal that the tensile plasticity of cold-rolled Cu can be effectively enhanced by a layered structure stacked alternately by thicker Cu and thinner Al layers. The layer interface in the composite strongly constrains and delays the development of premature local necking of the cold-rolled Cu layer. A potential way to improve plasticity without losing strength is suggested.