An Investigation of The Effects of Mn Amount on Wear Behaviors of 7075Al Alloy Produced by Powder Metallurgy Method

Abstract

In this study, microstructure, hardness and wear behaviors of 7075 Al alloy with adding different amount of Mn were investigated produced by powder metallurgy method. In the scope of the study, four different amount of Mn (0.5%, 1%, 2%,3%) was added to gas atomized 7075 Al powders and mechanical mixed. Mixed Al and Mn powders were pre-shaped by cold pressing. Then, they were sintered in an atmosphere controlled furnace. Microstructure examination was done by scanning electron microscope, hardness values were measured using macro hardness tester. The wear tests were performed by pin-on disc type wear test device under 15 N loads with four different sliding distances. As a result of the study, it was determined that the hardness values were increased by increasing amount of the Mn. In addition, wear loss were decreased with increasing Mn amount.

Keywords

• Powder metallurgy
• AA7075
• Mn amount
• hardness
• wear