期刊
APPLIED SURFACE SCIENCE
卷 308, 期 -, 页码 176-183出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.04.131
关键词
Co-Cr-Ni-Mo alloy; Friction stir processing; Laser clad; Gradient nanograin; Model
类别
资金
- National Natural Science Foundation of China [51101126]
- Open Fund of State Key Laboratory of Powder Metallurgy [20110942K]
A gradient-nanograin surface layer of Co-base alloy was prepared by friction stir processing (FSP) of laser-clad coating in this work. However, it is lack of a quantitatively function relationship between grain refinement and FSP conditions. Based on this, an analytic model is derived for the correlations between carbide size, hardness and rotary speed, layer depth during in-situ FSP of laser-clad Co-Cr-Ni-Mo alloy. The model is based on the principle of typical plastic flow in friction welding and dynamic recrystallization. The FSP experiment for modification of laser-clad Co-based alloy was conducted and its gradient nanograin and hardness were characterized. It shows that the model is consistent with experimental results. (C) 2014 Elsevier B.V. All rights reserved.
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