Effects of Mg content on aging behavior of Al4CuXMg PM alloy |
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| Affiliation: | 1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. University of Academy of Sciences, Beijing 100049, China;3. School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;1. Department of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034, Russia;2. Faculty of Chemistry, University of Wroclaw, Joliot Curie 14, 50-383 Wroclaw, Poland |
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| Abstract: | Starting with elemental (pre-mixed) powders for producing shaped powder metallurgy alloys provides some advantages over a pre-alloyed system. The premixed powders are softer than prealloyed powders and therefore by using premixed powders it is possible to have higher compact densities and within a longer die life. In this research work, elemental aluminum powder was mixed with copper and magnesium in various ratios. They were compacted, sintered and heat treated in order to produce light but strong Al-based powder metallurgy alloys. The main focus of this paper is on the effects of micro to macro scale addition of magnesium on the aging response of Al4Cu alloys. Four per cent Cu gives Al powder metallurgy alloy a good control of sintering and a large space for solution treatment. Minor addition of Mg with little amount of Fe, comes from the based Al and Cu powders, enhances the hardness values of Al4Cu powder metallurgy alloys. Highest hardness value was 118 HB obtained from 24 h aged Al4Cu2Mg alloy. |
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