An investigation on Al6061/TiB2 nano composites production through Mechanical Alloying route and their corrosion behavior

Subject Areas : Composite materials

Iman  ebrahimzadeh ¹ (1Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)
Farhad  Gharavi ² (Department of Materials Engineering, Sirjan Branch, Islamic Azad University, Sirjan, Iran)
G.H.  Borhain ³ (Department of Materials Engineering, Malek-e-Ashtar University of Technology, Isfahan, Iran)

Received: 2017-07-30 Accepted : 2018-10-01 Published : 2018-06-01

Keywords: Nanocomposite, A16061 nano-composite alloy, Mechanical alloying, Hot extrusion process, Corrosion,

Abstract :

Aluminum-based alloy composites with high strength and low density can be used in corrosive environments. In this research, the nano-powders of A16061 alloy and A16061/TiB2 composite were synthesized by mechanical alloying (MA) method. Then, A16061 /TiB2 nano-composite bulk samples were prepared at laboratory scale by hot extrusion approach. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) devices were respectively used for measurement of particles and grains, and the polarization test was employed to assess the corrosion behavior of A16061 /TiB2 nano-composites. The grains size of hot extrusion samples were calculated as about 95 nm. Uniform corrosion behavior and pitting of the produced nano samples of MA6061 /1.25 TiB2 have higher corrosion resistance compared to the alloy samples of MA6061.3. The uniform corrosion in the 2MA-Al-6061/1.25TiB2 composite had the lowest rate compared to other samples.The sensitivity of this alloy to pitting corrosion has raised compared to the melting state; however, this sensitivity is less than the alloy made by mechanical alloying method.