Mabhali, Luyolo ABSacks, NPityana, Sisa L2013-04-192013-04-192012-03Mabhali, L.A.B,, Sacks, N. and Pityana, S. 2012. Impact toughness of laser surface alloyed Aluminium. Journal of Materials Science & Technology, pp 1-291005-0302http://hdl.handle.net/10204/6702Copyright: 2012 Elsevier. This is the Pre/post print version of the work. The definitive version is published in Journal of Materials Science & Technology, pp 1-29Laser surface alloying of aluminium AA1200 was performed with a 4kW Nd:YAG laser and the impact resistance of the alloys was investigated. The alloying powders were a mixture of Ni, Ti and SiC in different proportions. Surfaces reinforced with intermetallic phases and metal matrix composites were achieved during laser alloying. Brittle fracture of the SiC particles and transgranular cracking of the intermetallic phases was observed for the laser alloyed samples, while ductile fracture was observed for the bulk aluminium. The aluminium metal absorbed more energy during fracture compared to the laser alloyed samples due to its high ductility. Laser alloyed layers with a high Ti content had high absorbed energies which represent a reduction in brittleness, while alloyed layers with a high Ni content had low absorbed energies which indicate a preference for brittle fracture.enAluminium alloysImpact toughnessIntermetallic phasesMetal matrix compositesArticleMabhali, L. A., Sacks, N., & Pityana, S. L. (2012). Impact toughness of laser surface alloyed Aluminium. http://hdl.handle.net/10204/6702Mabhali, Luyolo AB, N Sacks, and Sisa L Pityana "Impact toughness of laser surface alloyed Aluminium." (2012) http://hdl.handle.net/10204/6702Mabhali LA, Sacks N, Pityana SL. Impact toughness of laser surface alloyed Aluminium. 2012; http://hdl.handle.net/10204/6702.TY - Article AU - Mabhali, Luyolo AB AU - Sacks, N AU - Pityana, Sisa L AB - Laser surface alloying of aluminium AA1200 was performed with a 4kW Nd:YAG laser and the impact resistance of the alloys was investigated. The alloying powders were a mixture of Ni, Ti and SiC in different proportions. Surfaces reinforced with intermetallic phases and metal matrix composites were achieved during laser alloying. Brittle fracture of the SiC particles and transgranular cracking of the intermetallic phases was observed for the laser alloyed samples, while ductile fracture was observed for the bulk aluminium. The aluminium metal absorbed more energy during fracture compared to the laser alloyed samples due to its high ductility. Laser alloyed layers with a high Ti content had high absorbed energies which represent a reduction in brittleness, while alloyed layers with a high Ni content had low absorbed energies which indicate a preference for brittle fracture. DA - 2012-03 DB - ResearchSpace DP - CSIR KW - Aluminium alloys KW - Impact toughness KW - Intermetallic phases KW - Metal matrix composites LK - https://researchspace.csir.co.za PY - 2012 SM - 1005-0302 T1 - Impact toughness of laser surface alloyed Aluminium TI - Impact toughness of laser surface alloyed Aluminium UR - http://hdl.handle.net/10204/6702 ER -