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首页> 外文期刊>Science and Technology of Advanced Materials >Formation of nanocrystalline surface layers in various metallic materials by near surface severe plastic deformation
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Formation of nanocrystalline surface layers in various metallic materials by near surface severe plastic deformation

机译：通过近表面严重的塑性变形在各种金属材料中形成纳米晶表面层

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摘要

The surface of the various kinds of metallic materials sheets were severely deformed by wire-brushing at ambient temperature to achieve nanocrystalline surface layer. The surface layers of the metallic materials developed by the near surface severe plastic deformation (NS-SPD) were characterized by means of TEM. Nearly equiaxed nanocrystals with grain sizes ranging from 30 to 200 nm were observed in the near surface regions of all the severely scratched metallic materials, which are Ti-added ultra-low carbon interstitial free steel, austenjtic stainless steel (SUS304), 99.99 wt.%Al, commercial purity aluminum (A1050 and A1100), Al-Mg alloy (A5083), Al-4 wt.%Cu alloy, OFHC-Cu (C1020), Cu-Zn alloy (C2600) and Pb-1.5%Sn alloy. In case of the 1050-H24 aluminum, the depth of the surface nanocrystalline layer was about 15 μm. It was clarified that wire-brushing is an effective way of NS-SPD, and surface nanocrystallization can be easily achieved in most of metallic materials.
机译：通过在环境温度下通过钢丝刷使各种金属材料板的表面严重变形，从而获得纳米晶体表面层。通过TEM对由近表面严重塑性变形（NS-SPD）形成的金属材料的表面层进行表征。在所有严重划痕的金属材料的近表面区域中观察到了晶粒大小在30至200 nm范围内的近等轴纳米晶体，这些金属材料是添加了Ti的超低碳无间隙钢，奥氏体不锈钢（SUS304），99.99 wt。％。 ％Al，工业纯铝（A1050和A1100），Al-Mg合金（A5083），Al-4 wt。％Cu合金，OFHC-Cu（C1020），Cu-Zn合金（C2600）和Pb-1.5％Sn合金。在1050-H24铝的情况下，表面纳米晶体层的深度为约15μm。阐明了刷丝是NS-SPD的有效方法，并且在大多数金属材料中可以容易地实现表面纳米晶化。

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