Effect of microelements on microstructures and properties of Al-1. 2Mg-1. 3Si-0. 6Cu-0. 3Mn alloy

In order to save energy and protect environmentin automobile industry, one of the important methodsis to reduce the automotive weight1 ～4]. Since the a-luminum alloys showsuch as high specific strength,good formability, good corrosion resistance, and re-cycling potential, they are said to be the ideal candi-date to replace heavier materials in the automotiveindustry5 ～7].Recently, the heat -treatable 6000series aluminum alloys have been considered as theperfect light-weight material for au…

Effect of microelements on microstructures and properties of Al-1. 2Mg-1. 3Si-0. 6Cu-0. 3Mn alloy

The effects of impurity element of Fe and microelements of Zn, Cr and Ti on the constituents, dispcrsoids, grain size, mechanical properties and formability of Al-1. 3Mg-l. 2Si-0. 6Cu-0. 3Mn alloy were investigated in the present work by analyzing microstructures, phase composition, mechanical tests. The results indicated that with the increase of Fe content, the insoluble constituents increased, and the mechanical pmperties and r15 of alloy sheets debased, which can be recovered by the addition of microelements Zn, Cr and Ti. Al-1. 3Mg-1. 2Si-0. 6Cu-0. 3Mn alloy sheets in the T4 temper are difficult to strengthen with paint - bake treatment in automobile factory.