2020年
Nano-crystallization of steel surface by slide-burnishing
Key Engineering Materials
- ,
- ,
- 巻
- 841 KEM
- 号
- 開始ページ
- 48
- 終了ページ
- 53
- 記述言語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.4028/www.scientific.net/KEM.841.48
Slide-burnishing is one of the most powerful processes for microstructural evolution. Here slide-burnishing was performed by a cemented carbide ball loaded and fed on the flat surface of a rotating disk specimen of carbon steel using a lathe machine. This process provides many advantages: Burnishing reduces the surface roughness, increases the surface hardness due to grain refinement, improves the wear resistance, and requires no special equipment. Transmission electron microscopy (TEM) observation revealed that nano-crystalline structures in the 10–300 nm grain size range were formed at the burnished sub-surface layer and that grain size increased approximately linearly with depth below the surface due to the strain gradient. High rotation speed in the burnishing process prompted further grain refinement, as evidenced by ultrafine and equiaxed grains in the 10 nm size range at the top surface layer of the specimen burnished at the highest rotational speed. Burnishing increased the indentation hardness of the nano-crystalline layer by a factor of 3.5. The expected linear relationship between hardness and inverse square root of grain size was identified.
- リンク情報
- ID情報
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- DOI : 10.4028/www.scientific.net/KEM.841.48
- ISSN : 1013-9826
- eISSN : 1662-9795
- SCOPUS ID : 85094173851