Thermomechanical modeling of a single splat solidification in plasma spraying

• Autorzy: Zeng H. P. , Fang J. C. , Xu W. J. , Zhao Z. Y. , Wang L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In plasma spraying, the residual stress is one of the important factors that reduce the strength and shorten the service lifetime of the spray coatings. It is therefore essential to investigate the evolution of the temperature and the distribution of the residual stresses, which are primarily induced by initial temperature difference and thermal expansion coefficient mismatch between the splat and the substrate. Design/methodology/approach: As the plasma spraying process involves the solidification and cooling of extremely tiny molten metal droplets in a very short time, it is very difficult to observe the procedure directly. In this paper, a finite element model involving the temperature and residual stress simulation of a single NiCoCrAlY particle splat in plasma spraying when cooled on the carbon steel substrate is presented. Findings: The numerical analysis results show that the temperature rise is more evident within the interior than on the top surface of the substrate. The maximum residual stresses of about 170 MPa appear at the central part of the splat. Research limitations/implications: Future work should integrate the flattening process with the solidification and cooling of the droplet. Practical implications: It will be helpful to the understanding and control of residual stresses in plasma spraying. Originality/value: This research simulates the evolution temperature and residual stress distribution during the solidification and cooling process on the single splat level in plasma spraying.

Słowa kluczowe

EN

numerical techniques; plasma spraying; finite element analysis

PL

techniki numeryczne; natryskiwanie plazmowe; analiza elementów skończonych

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 327--330
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Zeng H. P.

• Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, 116024, P. R. China

autor

Fang J. C.

• College of Mechanical Engineering and Automation, HQU, Quanzhou 362021 P.R. China

autor

Xu W. J.

• Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, 116024, P. R. China

autor

Zhao Z. Y.

• College of Mechanical Engineering and Automation, HQU, Quanzhou 362021 P.R. China

autor

Wang L.

• College of Mechanical Engineering and Automation, HQU, Quanzhou 362021 P.R. China

Bibliografia

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