Friction-induced ultra-fine and nanocrystalline structures on metal surfaces in dry sliding
Friction-induced ultra-fine and nanocrystalline structures on metal surfaces in dry sliding
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DOI：
10.1016/j.triboint.2009.12.040
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发表时间：
2010-05-01
影响因子：
6.2
通讯作者：
Suiya, Nobuaki
中科院分区：
文献类型：
--
作者：
Kato, Hirotaka;Sasase, Masato;Suiya, Nobuaki
对碳钢、纯铁和纯铜进行了销盘式滑动摩擦试验，并对滑动表面的显微组织和硬度进行了详细的研究。结果表明，在圆盘表面形成了具有超细（< 200 nm）结构的斑片状转移层。在碳钢中发现了30-50 nm的纳米晶粒，在纯铜中发现了100-150 nm的亚微米晶粒。根据试样材料、滑动速度和外加载荷的不同，超细结构的厚度在10-50 μ m之间。与基体相比，纯铁在滑动表面附近的硬度有所提高。结果表明，硬化是由于剧烈的塑性变形形成了非常精细的组织，而不是由于热效应引起的相变。2009爱思唯尔有限公司版权所有。
Sliding friction tests of pin-on-disc type were carried out for carbon steel, pure iron and pure copper, and the microstructure and hardness near the sliding surfaces were investigated in detail. It was found that patchy transfer layers with ultra-fine ( < 200 nm) structures were produced on the disc surfaces. Nanocrystalline grains of 30-50 nm were identified for carbon steel, and submicron sized grains of 100-150 nm were observed in pure copper. The thicknesses of the ultra-fine structures were in the range of 10-50 mu m, depending on the specimen material, sliding speed and applied load. The hardness near the sliding surface of pure iron was increased compared with the matrix. It was suggested that the hardening was due to the very fine structure formed by severe plastic deformation, but not due to phase transformation caused by thermal effects. (C) 2009 Elsevier Ltd. All rights reserved.