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Elastic Modulus of 304 Stainless Steel Coating by Cold Gas Dynamic Spraying

Journal of Iron and Steel Research International 2012年第3期19卷 73-78页

作者： HAN Wei1, MENG Xian-ming1, ZHANG Jun-bao2, ZHAO Jie1 (1. School of Material Science and Engineering, Dalian University of Technology, Dalian 116085, Liaoning, China 2. Baoshan Iron and Steel Company Limited, Baosteel Research Institute, Shanghai 201900, China) School of Material Science and Engineering Dalian University of Technology Dalian Liaoning China Baoshan Iron and Steel Company Limited Baosteel Research Institute Shanghai China

304 stainless steel coating was deposited on the IF steel substrate by cold gas dynamic spraying （CGDS）, and the elastic modulus of the 304 stainless steel coating was studied. The elastic modulus of cold sprayed 304 stain- less steel coating was measured using the three-point bend testing and the compound beam theory, and the other me- chanic parameters （such as the equivalent flexural rigidity and the moment of inertia of area） of the coatings were also calculated using this compound beam theory. It is found that the calculated results using the above methods are accu- rate and reliable. The elastic modulus value of the cold sprayed 304 stainless steel coating is 1. 179 X 105 MPa, and it is slightly lower than the 304 stainless steel plate （about 2 X 105 MPa）. It indicates that the elastic modulus of the cold sprayed coatings was quite different from the comparable bulk materials. The main reason is that the pores and other defects are existed in the coatings, and the elastic modulus of the coatings also depends on varies parameters such as the feed stock particle size, porosity, and processing parameters.

关键词： cold gas dynamic spraying 304 stainless steel coating three-point bend testing compound beam theory elastic modulus

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