Research Article:

Haider Tawfiq Naeem
Chemical Engineering Department., Engineering College ,Al-Muthanna University

Email address:  dr.haider.ta@mu.edu.iq

ABSTRACT

Productions of surfaces composites have high mechanical properties and altered
microstructural is attracting considerable attention. One of the methods of
fabricating composite surfaces of aluminium matrix alloys are the procedure of
Friction Stir Process (FSP). In this investigation, the producing for the surface
composites of Aluminum_Zinc_Magnesium_Copper alloy (7000 series) with
the pulverizing particulates of (Al_5wt%Zn_2.5wt%Mg_1.5wt%Cu_4wt%,
6%, 8% Ni), as the reinforcement particles using FSP was discussed. The
reinforcements were from Al_Zn_Mg_Cu particulates as well various nickel
powder (mass percentages) synthesized using the high-energy, ball milling
alloying process. Composites samples underwent for the homogenizing
treatment through various temperatures. These samples have subjected the
ageing treat with 120 °C for one day. Results showed a 70% decrease in the grain
sizes of the surface of composites Al-alloys compared with as-received Al-alloy.
The grain refinement and uniform dispersion of the reinforcements during the
Al-matrix were obtained because of the optimized parameters of FSP. The
intensity of precipitations intermetallic, which as reinforcements increased after
heat treatments along with the phases of the precipitates. The effects of the grain
reduction and intercompounds with the precipitation phases led to a valuable rise
in the hardness property of surface of aluminium 7000 alloy-reinforced
composities.

Keywords: Strengthening Intermetallic; Mechanical Alloying; FSP

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