Chinese Journal of Lasers, Volume. 47, Issue 1, 0102002(2020)

Effect of Substrate Preheating on Microstructure and Properties of Laser-Deposited TA15/GH4169 Composite Structure

Bo He1, Chen Wang1, Changqing Sun2, Guang Yang1、*, Xiangming Wang3, and Yadong Su3
Author Affiliations
  • 1School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, Liaoning 110136, China
  • 2Mechanical College, Shenyang Institute of Engineering, Shenyang, Liaoning 110136, China
  • 3AVIC Shenyang Aircraft Design & Research Institute, Shenyang, Liaoning 110035, China;
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    In this study, a direct transition TA15/GH4169 dual alloy composite structure is prepared using the laser deposition manufacturing technique at preheating substrate temperatures of 100 ℃ and 400 ℃. Further, the effect of the preheating temperature on the microstructure, residual stress, and microhardness of the TA15/GH4169 interface is investigated. Based on the results, substrate preheating can be concluded to considerably influence the forming quality of the composite structure, whereas the non-preheated substrates produce defects at the composite structure interface. The forming quality improves when the preheating temperature is 400 ℃, and a gradient transition zone of approximate 0.33 mm is formed at the composite structure interface. The residual stress on the GH4169 side significantly decreases when the preheating temperature is increased from 100 ℃ to 400 ℃. The residual stress value reduces by 21.59% when the substrate is preheated to 100 ℃, whereas it reduces by 33.19% when the substrate is preheated to 400 ℃. The microhardness of the composite structure slightly decreases with an increase in the preheating temperature. At the same preheating temperature, the microhardness of the transition zone is the highest. At 400 ℃, the microhardness of the transition zone increases by 91.2% compared with that of the TA15 side.

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    Bo He, Chen Wang, Changqing Sun, Guang Yang, Xiangming Wang, Yadong Su. Effect of Substrate Preheating on Microstructure and Properties of Laser-Deposited TA15/GH4169 Composite Structure[J]. Chinese Journal of Lasers, 2020, 47(1): 0102002

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    Paper Information

    Category: laser manufacturing

    Received: Jul. 8, 2019

    Accepted: Sep. 23, 2019

    Published Online: Jan. 9, 2020

    The Author Email: Guang Yang (yangguang@sau.edu.cn)

    DOI:10.3788/CJL202047.0102002

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