Pulse-Impact on Microstructure of Liquid-Phase-Pulse-Impact Diffusion Welded Joints of Particle Reinforcement Aluminum Matrix Composites at Various Temperatures
- 1 Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China
Abstract
Investigation was to study the influence of pulse-impact on microstructure of Liquid-Phase-Pulse-Impact Diffusion Welding (LPPIDW) welded joints of aluminum matrix composite SiC p /A356, SiC p /6061Al, Al 2 O 3p /6061Al. Results showed that under the effect of pulse-impact: 1 ) the interface state between reinforcement particle (SiC, Al 2 O 3 ) and matrix was prominently; 2 ) the initial pernicious contact-state of reinforcement particles was changed from reinforcement (SiC, Al 2 O 3 )/reinforcement (SiC, Al 2 O 3 ) to reinforcement (SiC, Al 2 O 3 )/matrix/ reinforcement (SiC, Al 2 O 3 ); 3 ) the density of dislocation in the matrix neighboring to and away from the interface in the matrix was higher than its parent composite; and 4 ) the intensively mutual entwisting of dislocation was occurred. Studies illustrated that: 1) deformation was mainly occurred in the matrix grain; and 2) under the effect of pulse-impact, the matrices around reinforcement (SiC, Al 2 O 3 ) particles engendered intensive aberration offered a high density nucleus area for matrix crystal, which was in favor of forming nano-grains and improved the properties of the successfully welded composite joints.
- S. V. Nair, J. K. Tien and R. C. Bates, “SiC-Reinforced Aluminium Metal Matrix Composites,” International Metals Reviews, Vol. 30, No. 6, 1995, pp. 275-288.
- A. Pirondi and L. Collini, “Analysis of Crack Propagation Resistance of Al-Al2O3 Particulate-Reinforced Composite Friction Stir Welded Butt Joints,” International Journal of Fatigue, Vol. 31, No. 1, 2009, pp. 111-121. doi:10.1016/j.ijfatigue.2008.05.003
- F. Rotundo, L. Ceschini, A. Morri, T. S. Jun and A. M. Korsunsky, “Mechanical and Microstructural Characterization of 2124Al/25 vol% SiCp Joints Obtained by Linear Friction Welding (LFW),” Composite Part A: Applied Science and Manufacturing, Vol. 41, No. 9, 2010, pp. 1028-1037. doi:10.1016/j.compositesa.2010.03.009
- J. M. G. de Salazar and M. I. Barrena, “Dissimilar Fusion Welding of AA7020/MMC Reinforced with Al2O3 Particles. Microstructure and Mechanical Properties,” Materials Science and Engineering A, Vol. 352, 2003, pp. 162-168.
- D. J. Loyd, “Particle Reinforced Aluminum Magnesium Composites,” International Materials Reviews, Vol. 39, No. 1, 1994, pp. 1-22. doi:10.1179/095066094790150982
- J. Maity, T. K. Pal and R. Maiti, “Transient Liquid Phase Diffusion Bonding of 6061-15 wt% SiCp in Argon Environment,” Journal of Materials Processing Technology, Vol. 209, No. 7, 2009, pp. 3568-3580. doi:10.1016/j.jmatprotec.2008.08.015
- J. S. U. Schell, J. Guilleminot, C. Binetruy and P. Krawczak, “Computational and Experimental Analysis of Fusion Bonding in Thermoplastic Composites: Influence of Process Parameters,” Journal of Materials Processing Technology, Vol. 209, No. 11, 2009, pp. 5211-5219. doi:10.1016/j.jmatprotec.2009.03.008
- N. S. Sundaram and N. Murugan, “Tensile Behavior of Dissimilar Friction Stir Welded Joints of Aluminum Alloys,” Materials & Design, Vol. 31, No. 9, 2010, pp. 4184-4193. doi:10.1016/j.matdes.2010.04.035
- H. Arik, M. Aydin, A. Kurt and M. Turker, “Weldability of Al4C3-Al Composites via Diffusion Welding Technique,” Materials & Design, Vol. 26, No. 6, 2005, pp. 555-560. doi:10.1016/j.matdes.2004.07.017
- American Welding Society, “Welding Handbook,” American Welding Society, Miami, 1996.
- A. H. Feng, B. L. Xiao and Z. Y. Ma, “Effect of Micro structural Evolution on Mechanical Properties of Friction Stir Welded AA2009/SiCp Composite,” Composites Science and Technology, Vol. 68, No. 9, 2008, pp. 2141-2148. doi:10.1016/j.compscitech.2008.03.010