Effect of Plastic Deformation and Cooling conditions on the characteristics of work hardening and Structure of Al-3003 commercial alloy

摘要

The phase transformation kinetics occurring in Al-3003 commercial alloy containing Mn, Fe, Si were studied by means of the stress-strain characteristics and microstructure analysis. The supplied sample was swaged in forai of wire of diameter 0.6 mm, then heated at 873 K for two hours in order to remove the cold work, recovery and recrystallization was obtained in the material. The alloy samples in form of wire were annealed isochronally at temperatures range from 473-823 K in two groups. One group was quenched in cold water and the second was slowly cooled. The stress-strain parameters as a function of temperature are divided into three stages of transformation associated to either precipitation or dissolution of intermetallic phases. The tensile tests were performed at constant strain rate =3x 10~(-4) S~(-1) in the temperature range 473 K - 823 K .The mean value of energy (E) activating the formation process was determined to clarify the deformation mechanism.