As a widely-used approach for surface modification, laser cladding plays a significant role in aerospace, turbine and other fields. However, the defects usually existing in laser cladding parts, such as pores, cracks, tensile residual stress, significantly affect the performance and the application of the cladding parts. In this study, SS316L alloy layer was fabricated on 45 steel substrate using laser cladding process assisted by multidimensional vibration. By changing the vibration direction, the microstructures and the properties of the coating and the bonding interface with various vibration parameters were analyzed and compared. The microstructures of the cladding layer and the matrix were analyzed by an optical microscope and a scanning electron microscopy (SEM). The results show that the multidimensional vibration is able to refine the columnar dendrites formed in the cladding layer. The transient excitation generated by the vibration enhances the convection of the molten pool in the solidification process, breaks the dendrite arm, and increases the nucleation rate. Meanwhile, affected by the multidimensional vibration, the porosity and the maximum pore size of the cladding layer significantly reduced. The tests of the microhardness distribution showed that the the average microhardness of the cladding layer significantly increased and the microhardness fluctuation decreased assisted by the multidimensional vibration. Experimental results also demonstrate that the effects of the three-dimensional vibration are more significant than the single vertical vibration. The proposed approach provides a potential way to improve the laser cladding process.
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ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics
October 14–18, 2018
Orlando, Florida, USA
ISBN:
978-1-940168-18-0
PROCEEDINGS PAPER
Effects of multidimensional vibration on laser cladding of SS316L alloy
Zhehe Yao;
Zhehe Yao
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Yanbin Nie;
Yanbin Nie
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Qunli Zhang;
Qunli Zhang
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Xiaowen Yu;
Xiaowen Yu
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Xijiang Lu;
Xijiang Lu
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Jianhua Yao
Jianhua Yao
*
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology
, No. 288 Liuhe Road, Hangzhou, Zhejiang, 310023, PR China
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Published Online:
October 01 2018
Citation
Zhehe Yao, Yanbin Nie, Qunli Zhang, Xiaowen Yu, Xijiang Lu, Jianhua Yao; October 14–18, 2018. "Effects of multidimensional vibration on laser cladding of SS316L alloy." Proceedings of the ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics. ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics. Orlando, Florida, USA. (pp. 1603). ASME. https://doi.org/10.2351/7.0004059
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