1M. Tech, Mechanical Engineering Department, PVP Siddhartha Engineering College, India
2Professor, Mechanical Engineering Department, PVP Siddhartha Engineering College, India
Online published on 21 November, 2017.
In the present investigation, a comparative study on the mechanical properties of AA 2014, AA6351 and AA7075 alloys. The heat treated samples subjected to some mechanical tests and fractography of the resulting fracture surfaces were characterized by SEM (Scanning Electron Microscopy). The fractography and tensile test shows that the materials of 2014 (YS: 445.5 MPa), 7075 (YS: 444.6 MPa) are brittle and 6351 processes less ductility and also 2014 is semiductile (Impact energy: 4 J) compared to 7075 alloy (Impact energy: 2 J). The 6351 alloy is more ductile (Impact Energy: 12 J) and having less yield strength of about 316.5 MPa. The mechanical properties of precipitation hardened alloys was 23 times higher than the oil quenched alloys. The fractography studies reveal that in AA 2014 and 6351 alloys the cup-cone ductile type fracture was observed. But in Al 7075 alloy, the brittle type fracture was more evident compared to other alloys.
Heat, Air colling, Energy
