مقارنة الخواص الميكانيكية لسبيكة الألمنيوم (7075)‎ المنتجة بتكنولوجيا المساحيق مع مثيلتها المنتجة بطريقة السباكة التقليدية

Abstract EN

A study had been made for the mechanical properties after the lubricated hot extrusion of the produced samples of the high strength Aluminum alloys powders represented by the powder of the Aluminum alloy (A7075) produced by Spinning Water Atomization Process (SWAP) which is one of the most important methods used to produce the powders with very fine granules sizes and high purity compared with other powder producing methods.

The properties of tensile strength, micro-hardness, and yield stress of the samples produced by the powders metallurgy, had been studied and compared the results with samples of the same alloy produced by the classic casting method, It had been observed that the powders samples have excellent and outstanding tensile strength, hardness, and yield stress, which were (457 Mpa, 140 Hv, 352 MPa) consecutively, compared with the samples produced by casting.

Also, it had been observed that the microstructure of the extruded powders at temperature ( 350 Co ) contain metallic phases in homogeneous shapes inside the very fine granules, while the same metallic phases accumulated in non-organized and along the granular borders of the relatively big granules for the classic casting samples.

Also, it had been observed that values of the mechanical properties of the powders samples reduced when the extrusion temperature increase, while the casting samples deviate from that in some properties .

On the other hand, the results show that the elongation of the powders samples are a little less than the similar results obtained from the casting samples and at all extrusion temperatures.