Heat Treatment Of Aluminum Alloy 7449
| Autor: | Suleiman E. Al-lubani, Mohammad E. Matarneh, Hussien M. Al-Wedyan, Ala M. Rayes |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.5281/zenodo.1086560 |
| Popis: | Aluminum alloy has an extensive range of industrial application due to its consistent mechanical properties and structural integrity. The heat treatment by precipitation technique affected the Magnesium, Silicon Manganese and copper crystals dissolved in the Aluminum alloy. The crystals dislocated to precipitate on the crystal's boundaries of the Aluminum alloy when given a thermal energy increased its hardness. In this project various times and temperature were varied to find out the best combination of these variables to increase the precipitation of the metals on the Aluminum crystal's boundaries which will lead to get the highest hardness. These specimens are then tested for their hardness and tensile strength. It is noticed that when the temperature increases, the precipitation increases and consequently the hardness increases. A threshold temperature value (264C0) of Aluminum alloy should not be reached due to the occurrence of recrystalization which causes the crystal to grow. This recrystalization process affected the ductility of the alloy and decrease hardness. In addition, and while increasing the temperature the alloy's mechanical properties will decrease. The mechanical properties, namely tensile and hardness properties are investigated according to standard procedures. In this research, different temperature and time have been applied to increase hardening.The highest hardness at 100°c in 6 hours equals to 207.31 HBR, while at the same temperature and time the lowest elongation equals to 146.5. {"references":["Dorward RC, Bouvier C. A rationalization of factors afficting strength, ductelety and tufnece of AA6061-tipe AL-Mg-Si-Cu alloys. J Mater Sci Eng.,1998; A254:33- 44.","Markandeya RSN, Sarma DS. Precipitation hardening of Cu-Ti-Zr alloys.J Mater SciTechnol 2004; 20: 849-58.","Zehn l, Kang SB, Kim HW. Effect of natural aging and presaging on subsequent precipitation process of an AL-Mg-Si alloy with high excess silicon.J Mater Sci.Technol 1997; 13:905.","Sun Y, Baydogan M, Cimeenoglu H. The effect of deformation before aging on the wear resistance of an aluminum alloy, Mater Lett 1999; 38: 221-6.","M, Field DP, Lorimer GW. A systematic comparison of static and dynamic Caiaging of AL-Mg-Si alloys. J Mater SsiEng 2004; A373: 65- 71.","Murizam D, Shamsul JB. Effect of solution treatment temperature on recycled aluminum alloy 319. I International Conference on Sustainable Material Penang, Malaysia 2007 ; 226-8."]} |
| Databáze: | OpenAIRE |
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