Abstract
This study investigated the effects of aging process on the mechanical properties and machinability in AA6013 aluminum alloy. To this end, AA6013 aluminum alloy samples were maintained in heat treatment furnace at 530°C (for 8 h) and placed in hot water (at 70°C), and then subjected to aging process by storing in heat treatment furnace (at 180°C) for various times (1, 3, 6, 9, 12 and 24 h). Changes in mechanical and machinability properties of samples that underwent aging process were investigated. At the end of the aging process, an increase was observed in mechanical properties of AA6013 alloy. Cutting forces increased during the machining of alloy depending on the increase in aging time. High mechanical properties were obtained at the end of the 6-h aging process of AA6013 aluminum alloy. A significant increase was observed between mechanical properties obtained at the end of the 6-h aging time and machinability properties with values obtained at the end of the 24th hour. Key words: Machining, aging, AA6013 aluminum alloys, mechanical properties.  
Highlights
The fact that aluminum alloys have such characteristics as being able to develop low density, high specific resistance, high corrosion resistance and mechanical properties, ease of forming and machining enabled creation of areas of use in various sectors
This study investigated the effects of aging process on the mechanical properties and machinability in AA603 aluminum alloy
A significant difference was not observed in the experiment between ultimate tensile strengths (UTS) and Yield Strength (YS) values obtained at the end of 6-h and 24-h aging
Summary
The fact that aluminum alloys have such characteristics as being able to develop low density, high specific resistance, high corrosion resistance and mechanical properties, ease of forming and machining enabled creation of areas of use in various sectors. Of these sectors, automotive, transportation, aviation-aeronautics, electronics, machinery, and manufacturing are the leading ones. They are especially important for achieving fuel savings by reducing weight due to being lightweight and in the prevention of air pollution (Florea et al, 2012; Chen et al, 2012; Bakavos and Prangnell, 2010; Siddiqu et al, 2000; Hayat, 2012) Another important characteristic of aluminum alloys is that the mechanical properties are open to improvement. Changes in mechanical properties of samples that underwent aging process at varying times, their machinability properties, and the correlation between them were investigated
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