DefinePK

Abstract

AA 6061 is used in the automotive, aircraft, marine and construction industries due to it is excellent properties such as noncorrosive, strength to weight ratio and rewards over than steel in ductility. Four groups of particle size were chosen (25, 63, 100, mix) µm. Each group has compacted by three specimens for various of Sintering temperature (487, 552, 617) OC, the compaction pressure and holding time were constant (9) tons, (20) min, respectively. The mechanical properties of the four groups depend on the variations of sintering temperature. So, it is useful first to present and discuss the results of microstructure to understand the strengthening mechanism. In this study, compression strength value was increased with the increasing of sintering temperature value to (552) OC of all types of suggested groups due to the bonding between particles was stronger, in addition, the pores amount was decreased. After that, it was decreased due to the particles become big size lead to the barriers were decreased. The maximum value of compression strength was detected by mix group which was (160) MPa while the particle size (100) µm was the minimum value which was (115)MPa. Where as the groups (25) µm and (63) µm were (150) and (134)MPa respectively.