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Proceedings Paper

Surface modification of roll by pulsed Nd:YAG laser: bump formation caused by martensitic transformation
Author(s): Shenghua Wang; Dong Du; Baohua Chang; Li Wang; Yunfeng He
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Paper Abstract

The morphologies of roll surfaces are modified with pulsed Nd:YAG laser and characterized by topography measuring instrument (WYKO-16 DRT2TC). Sombrero shaped bumps with diameters of 230-250 μm and heights of 2-4 μm are produced by out-of-focus laser beam. In laser surface heating, the cooling rate is high enough for all the material that undergoes austenitic transformation to be transformed into martensite. To explain the mechanism leading to the surface topography resulting from the Nd:YAG laser texturing of roll surface. A quantitative model is proposed to predict the bump formation during martensitic transformation. The results show: the bump height caused by martensitic transformation is very small. The key factor of macroscopic bump formation on roll surface during laser texturing is surface tension of molten metal.

Paper Details

Date Published: 13 January 2005
PDF: 7 pages
Proc. SPIE 5629, Lasers in Material Processing and Manufacturing II, (13 January 2005); doi: 10.1117/12.570318
Show Author Affiliations
Shenghua Wang, Harbin Institute of Technology (China)
Tsinghua Univ. (China)
Dong Du, Tsinghua Univ. (China)
Baohua Chang, Tsinghua Univ. (China)
Li Wang, Tsinghua Univ. (China)
Yunfeng He, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5629:
Lasers in Material Processing and Manufacturing II
ShuShen Deng; Akira Matsunawa; Y. Lawrence Yao; Minlin Zhong, Editor(s)

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