Effect of Heat Treatment on Microstructure and Mechanical Properties of AZ91 and AZ91 Reinforced Carbon Nanotube

摘要

In present work the effect of heat treatment on microstructure and mechanical properties of AZ91 and AZ91 reinforced with carbon nanotube (CNT) were tested after undergoes Sintering,Tl at 450 'C , Solution Treatment,T4 at 415°C and Ageing Treatment,T6 at 715°C. Then, all samples will be analyze their microstructure morphology, phase composition, hardness and compression strength by using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Rockwell Hardness machine and Universal Tensile Machine (UTM). CNT were clustered homogeneously into the matrix of AZ91 due to successfully mechanical alloying using planetary mill for 20 hours. Precipitation of P-Phase (Mg17Al|2) were reveal in XRD pattern usually highest intensity at 20=30'until 40.Meanwhile, the ageing treatment,T6 nanocomposites found increase in hardness, compare to monolithic has lower value started form 4 hours until 8 hours of ageing.