Influence of Heat Treatment on Properties of en Aw 6082 Aluminium Alloy

Abstract

The main aim of this work is to point out on possibility of properties improving of the aluminium alloy EN AW 6082 (AlSi1MgMn) with an appropriate combination of pre-ECAP solution annealing, the application of the severe plastic deformation by ECAP technology (equal channel angular pressing) and post-ECAP artificial aging. The effect of the severe plastic deformation and artificial aging on the alloy structure was evaluated by metallographic analysis, and alloy mechanical properties by uniaxial tensile test at room temperature, the Vickers hardness and by tribology test of resistance to abrasive wear. As a result of strain hardening by severe plastic deformation it reaches the improvement in hardness (by 56%), strength characteristics (yield strength by 92%, tensile strength by 29%) and abrasion wear resistance is 28 %. Keywords: severe plastic deformation, tension test, aluminium alloys, wear IntroductionThe aluminium alloys belonging to 6XXX groups, which are widely used in structural applications, the construction industry, the automotive industry and architectural section as extrusions products [1]. AlSi1MgMn alloy is characterized by good mechanical properties, resistance to tribology (abrasion wear) and corrosion degradation, low density. Due to good tribological properties of alloy can be used in excellent application. These properties can be increased by strengthening mechanisms: alloying additives respectively heat treatment and the severe plastic deformation [2][3]. The AlSi1MgMn alloy is alloyed from the main elements namely magnesium and silicon. At higher magnesium content tends to increase strength properties of hardened alloy formation of Mg 2 Si phase. Silicon improves mechanical properties by changing the shape of the grain. Except of the main alloying elements, there are added the alloy chromium and manganese which form dispersion particles. These are larger than the other precipitates that can act as nucleation sites for strengthening precipitations, and have good thermal stability, which influences the recovery and recrystallization [4][5][6] Another way of improving the properties of the alloy is heat treatment (consisting of solution treatment, quenching in water, and a natural or artificial ageing treatment). From the

Galvanic corrosion of aluminum wrought alloys in integral hybrid components with carbon fiber reinforced plastics (CFRP) and titanium

“…[16] Figure 7b shows the presence of irregular intermetallic particles (2) such as Al 15 (FeMn) 3 Si 2 and a considerable quantity of very fine (<1 µm) precipitations mainly due to Mg 2 Si and/or Al 15 (FeMn) 3 Si 2 as documented in Ref. [17] . Figure 8 shows a CFRP-titanium-EN AW-6082 joint before and after 96 h neutral salt spray test.…”

“…EN AW‐6082 (AlMgSi1) is a heat treatable, weldable, medium strength wrought alloy with excellent corrosion resistance. EN AW‐6082 is frequently used as a structural alloy in the automotive and aerospace industry and general mechanical engineering . For the corrosion tests, this alloy was used in the temper designation T6 (T: solution heat treated, 6: maximum precipitation hardened).…”

“…EN AW-6082 is frequently used as a structural alloy in the automotive and aerospace industry and general mechanical engineering. [14][15][16][17] For the corrosion tests, this alloy was used in the temper designation T6 (T: solution heat treated, 6: maximum precipitation hardened).…”

THE MICROSTRUCTURE DEVELOPMENT DURING ISOTHERMAL HEAT TREATMENT STUDY OF AN Al-Mg-Si ALUMINIUM ALLOY

“…The 6xxx series aluminum alloys (Al-Mg-Si based) have been the subject of several scientific research works. Their excellent mechanical and electrical properties allowed their use in various sectors such as aerospace, automotive or electrical power transport [1][2][3][4]. In addition, with the development of the aluminum alloys industry, the requirements for Al-Mg-Si-Cu alloys with high strength and excellent plasticity have become more urgent.…”

Influence of Anodic Oxidation on the Polarization Resistance of Ti6Al4V Alloy after Shot Peening

“…These include thermal oxidation, ion implantation, plasma spray and anodic oxidation [4]. Anodic oxidation is a simple and effective technique allowing to enlarge the thickness of TiO 2 oxide layer thus improving corrosion and wear properties of the surface [5].…”