Micro structural Study of Equal-Channel Angular Pressing(ECAP)performed and Ultra Fine Grained of Nickel Reinforced Aluminium 7075 Alloy Composites

摘要

Microstructure and mechanical properties of equal-channel angular pressing(ECAP)processed and ultrafine grained(UFG)of nickel reinforced aluminium 7075 alloy composites were investigated.The composites were prepared using liquid metallurgy technique.The content of nickel in the composition was varied from 2 to 8%(by weight)in steps of 2%.The ECAP processing was carried out using die with an intersecting channel angle of 120°.Pin-on disc equipment was used for wear testing and X-Ray Diffraction Technique(XRD)was used to confirm the percentage of reinforcement of in the composites.This study shows that severe plastic deformation has significantly improved the mechanical properties of nickel reinforced aluminium 7075 alloy composites compared to an alloy.