Abstract

Excellent formability , low weight , Good weldability , Resistance to hot tearing and high tensile and fracture property are among the attractive charactersistics of (2024) aluminum alloy . The effect of solution treatment temperature , Aging time and the aging temperature on the machanical properties have been studied using impact and hardness testing . Microstructural changes were abserved using metallugical microscope .The increase in solution treatment temperature from 525 to 575 Cº resulted in an increase in the hardness and impact toughness was improved from 525 to 550 Cº and decrease at 575 Cº .When the aging time was increased from 3 to 21 hrs. (with an interval of 6 hrs). at 175C , the hardness increased , While the impact toughness decreased . When the aging temperature was increase from 160 to 190 Cº ( with an interval of 15Cº) ,The hardness increased , however the impact toughness decreased . The effect of heat treatments investigated in the present study was attributed to the microstractural change during this treatment , in the light of the results of the microstructral examination and concerned published literature .

The article was added to IASJ on 2012-07-17

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