Abstract:

The purpose of the work is by comparing the mechanical tests results, fracture surface analysis and metallographical studies of the samples obtained from two different groups of powders (prealloyed, elementally formed AA2014), trying to determine whether the values obtained by the use of elemental powder can have sufficient mechanical properties as design material. Samples was produced by using pre-alloyed (AA2014), elemental aluminum and copper powders by classical powder metallurgy (PM) method. As the same proportion that AA2014 alloy contains, copper was added elementally to the commercial pure Aluminum powder and cold compressing were performed in the cast. In the similar conditions, blending and mixing operations were carried out to obtain similar composition from pre-alloyed ( AA2014) powders and elemental powders. In the sintering conditions, three different temperatures (600˚C, 610˚C, 620˚C) were used and the sintering time kept constant (30 mins) . At this stage, it is expected that the aluminum matrix will dissolve Copper atoms to form solid solution. Metallographic studies carried out to examine the realization of this aspect . As a result, aluminum and copper powders can be used in elemental form instead of pre-alloyed AA2014 for a long die life.

Keywords: