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تأثير متغيرات معالجة Rra الحرارية على الخواص الميكانيكية لسبيكة الألمنيوم عالية المقاومة 7075, Mohammad Nefawy, Fouad Dhahya
تأثير متغيرات معالجة Rra الحرارية على الخواص الميكانيكية لسبيكة الألمنيوم عالية المقاومة 7075, Mohammad Nefawy, Fouad Dhahya
Palestine Technical University Research Journal
Retrogression and Re-Aging Heat Treatment improves tensile and wear resistance of aluminum alloys, to study the effect of Retrogression temperature and Retrogression time on the tensile strength, Toughness Impact and Hardness of 7075 aluminum alloy, we have applied in this research Retrogression treatments at different temperatures are 150°C, 180°C, 240°C and 370°C for 15 min, 30 min and 90 min. When the retrogression temperature was 180°C for 30 min, the alloy has reached its highest tensile strength and hardness it was respectively 586 Mpa and 165 HB, While the alloy has reached its highest impact toughness it was 32.7 J\Cm2, …
تأثير المعالجات الحرارية وإضافة النيكل على بنية وقساوة سبيكة الألمنيوم 7075, Yahya Nefawy
تأثير المعالجات الحرارية وإضافة النيكل على بنية وقساوة سبيكة الألمنيوم 7075, Yahya Nefawy
Palestine Technical University Research Journal
The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical propertiesmaking it distinct from other aluminum alloys. In this paper, we examine the effect of adding Nickel and heat treatments on the microstructure and hardnessof the 7075 aluminum alloy. Were we added different percentages of nickel [0.1, 0.5, 1] wt% to 7075Aluminum alloy, and applied various heat treatments (artificial aging T6 and Retrogression and re-aging RRA) on the 7075 alloys that Containing nickel. By applying RRA treatment, we obtained better results than the results obtained by applying T6 …