scholarly journals Investigation of structure, mechanical properties and crystallization of aluminum alloys containing aluminum oxide nanoparticles

2018 ◽  
Vol 243 ◽  
pp. 00022 ◽  
Author(s):  
Vladimir Valikhov ◽  
Nikolay Kahidze ◽  
Anton Khrustalyov ◽  
Ilya Zhukov ◽  
Alexander Vorozhtsov
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Aluminum Nitride ◽  
Aluminum Oxide ◽  
Cooling Rate ◽  
Oxide Nanoparticles ◽  
Aluminum Oxide Nanoparticles ◽  
Alloy Structure ◽  
6082 Aluminum Alloy

A357 and 6082 aluminum alloys strengthened by aluminum nitride nanoparticles were obtained. The process of crystallization of the A357-0.5 wt% Al2O3 and 6082-0.5 wt% Al2O3 alloys was studied under conditions of varying the cooling rate. The A357 and 6082 aluminum alloy structure and hardness were analyzed for the Al2O3 content from 0 to 1 wt%.

The Effect of Heat Treatments and Nickel Additive on The Microstructure and Hardness of 7075 Aluminum Alloy

2019 ◽  
Vol 7 (2) ◽  
pp. 34-41
Author(s):  
Mahmoud Alasad ◽  
Mohamad Yahya Nefawy
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Artificial Aging ◽  
Heat Treatments ◽  
7075 Aluminum Alloy ◽  
Nickel Additive

The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys. In this paper, we examine the effect of adding Nickel and heat treatments on the microstructure and hardness of the 7075 aluminum alloy. Were we added different percentages of nickel [0.1, 0.5, 1] wt% to 7075 Aluminum 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 treatment, and we obtained the high values of hardness and a smoother microstructure for the studied alloys by the addition of (0.5 wt%) nickel to alloy 7075.

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