Synthesis of bulk nanostructured materials by repeated cold-rolling
Synthesis of bulk nanostructured materials by repeated cold-rolling
复制标题
DOI：
10.1016/j.msea.2005.08.091
复制
发表时间：
2005-11-25
期刊：
影响因子：
6.4
通讯作者：
Wilde, G
中科院分区：
文献类型：
--
作者：
Dinda, GP;Rösner, H;Wilde, G
重复冷轧和中间折叠是一种替代的严重塑性变形技术，可以在常温下生产极细晶的块体纳米晶材料。在本工作中，我们合成了大量平均粒径小于10 nm的纳米晶镍样品。对于纯面心立方金属，任何其他SPD技术都没有获得如此细小的晶粒尺寸。通过塑性变形细化显微组织的主要关键似乎是施加非常大的塑性应变，但不一定同时施加几Gpa范围内的高压。(C)2005 Elsevier B.V.保留所有权利。
Repeated cold-rolling with intermediate folding represents an alternative severe plastic deformation technique to produce extremely fine-grained bulk nanocrystalline materials at ambient temperature. In the present work, massive nanocrystalline samples of Ni with an average grain size less than 10 nm have been synthesized. Such small grain sizes have not been obtained for a pure fcc-metal by any other SPD technique. The main key to refine the microstructure via plastic deformation seems to be the requirement to apply a very large plastic strain but not necessarily the simultaneous application of a high pressure in the range of several GPa. (c) 2005 Elsevier B.V. All rights reserved.