Influence of MWCNT on Precipitation Hardenable Aluminium Alloy Matrix on Age Hardening and Solutionizing

MWCNT’s is gaining focus as reinforcement due to its thermo mechanical and electrical properties especially for aluminium alloys. Precipitation hardenable aerospace alloys though have been used for a long time, very few study has been conducted to understand the influence of MWCNT’s for the above properties. This paper presents the influence of MWCNT’s on the precipitation mechanism, electrical conductivity and mechanical properties of AA2219. By heat treatment monolithic alloy achieved 26.66% improvement in hardness by 10 h aging compared with that of sintered one, whereas reinforced sample achieves the same amount hardness in short time of 90 minutes. MWCNT’s helps in achieving peak hardness at low aging time. MWCNT’s accelerates precipitation of Copper atoms which increases hardness. It has been found that the MWCNT’s has considerable influence on precipitation and improving the mechanical and electrical properties.