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Accumulated damage process of thermal sprayed coating under rolling contact by acoustic emission technique

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Abstract

The accumulated damage process of rolling contact fatigue (RCF) of plasma-sprayed coatings was investigated. The influences of surface roughness, loading condition, and stress cycle frequency on the accumulated damage status of the coatings were discussed. A ball-ondisc machine was employed to conduct RCF experiments. Acoustic emission (AE) technique was introduced to monitor the RCF process of the coatings. AE signal characteristics were investigated to reveal the accumulated damage process. Result showed that the polished coating would resist the asperity contact and remit accumulated damage. The RCF lifetime would then extend. Heavy load would aggravate the accumulated damage status and induce surface fracture. Wear became the main failure mode that reduced the RCF lifetime. Frequent stress cycle would aggravate the accumulated damage status and induce interface fracture. Fatigue then became the main failure mode that also reduced the RCF lifetime.

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Authors and Affiliations

  1. Key Laboratory of Special Purpose Equipment and Advanced Processing Technology (Zhejiang University of Technology), Ministry of Education and Zhejiang Province, Hangzhou, 310014, China

    Jia Xu, Zhen-yu Zhou & Zhong-yu Piao

  2. The State Key Laboratory of Fluid Power Transmission and Control, Hangzhou, 310027, China

    Zhong-yu Piao

Authors
  1. Jia Xu
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  2. Zhen-yu Zhou
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  3. Zhong-yu Piao
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Correspondence to Zhong-yu Piao.

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Xu, J., Zhou, Zy. & Piao, Zy. Accumulated damage process of thermal sprayed coating under rolling contact by acoustic emission technique. Front. Mech. Eng. 11, 227–232 (2016). https://doi.org/10.1007/s11465-016-0395-9

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  • DOI: https://doi.org/10.1007/s11465-016-0395-9

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