Experimental investigation and modelling of hot forming B₄C/AA6061 low volume fraction reinforcement composites

• Autorzy: Zheng K. , Lin J. , Wu G. , Hall R. W. , Dean T. A.

Identyfikatory

DOI

10.15632/jtam-pl.56.2.457

• Języki publikacji: EN

Abstrakty

EN

This paper presents an experimental investigation of the hot deformation behaviour of 15% B₄C particle reinforced AA6061 matrix composites and the establishment of a novel corresponding unified and physically-based visco-plastic material model. The feasibility of hot forming of a metal matrix composite (MMC) with a low volume fraction reinforcement has been assessed by performing hot compression tests at different temperatures and strain rates. Examination of the obtained stress-strain relationships revealed the correlation between temperature and strain hardening extent. Forming at elevated temperatures enables obvious strain rate hardening and reasonably high ductility of the MMC. The developed unified material model includes evolution of dislocations resulting from plastic deformation, recovery and punching effect due to differential thermal expansion between matrix and reinforcement particles during non-steady state heating and plastic straining. Good agreement has been obtained between experimental and computed results. The proposed material model contributes greatly to a more thorough understanding of flow stress behaviour and microstructural evolution during the hot forming of MMCs.

Słowa kluczowe

EN

Metal Matrix Composite (MMC); hot compression; AA6061; B₄C; dislocation

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2018
• Tom: Vol. 56 nr 2
• Strony: 457--469
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Zheng K.

• Imperial College London, Department of Mechanical Engineering, United Kingdom

autor

Lin J.

• Imperial College London, Department of Mechanical Engineering, United Kingdom

autor

Wu G.

• Harbin Institute of Technology, School of Material Science and Engineering, Harbin, China

autor

Hall R. W.

• Marbeau Design Consultancy, Paris, France

autor

Dean T. A.

• Trevor A. Dean University of Birmingham, Department of Mechanical Engineering, Birmingham, United Kingdom

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).