Study On Microstructure And Properties Of AZ80 Magnesium Alloy During Compression Deformation

Magnesium alloy as the lightest commercial metal structure material, with its superior performance and abundant reserves has potential and trend of replace traditional steel and aluminum alloy. Limited to its special crystal structure of HCP, led to the ability of plastic deformation of magnesium alloy is poor.This topic is mainly based on predecessors’ research as the theoretical basis, by controlling the different deformation parameters, to explore the parameters effect on material compression deformation microstructure and property. Through the comparison of tensile deformation and compression deformation to explore the influence of deformation mode on the properties of Mg alloys. The main research is as follows.(1)The deformation temperature, deformation rate and deformation direction will have an effect on material deformation ability, different deformation parameters caused the differences of mechanics properties. The experimental data shows that increasing deformation temperature can significantly improve the deformation capacity of Mg alloys, the influence of deformation rate on deformation need to consider temperature at the same time.(2)AZ80 magnesium alloy is a common Mg alloy that can through heat treatment to strengthen. In this paper, the main heat treatment is to aging the material after solution treatment, to explore the influence of different aging process on the properties and microstructure of material compressed. The experimental results showed that when material with 170 ℃ and 20 hours showed the most excellent deformation ability and minimum deformation resistance.(3)The tensile deformation of magnesium alloys, its yield strength and tensile strength is sensitive to deformation temperature, while the influence of deformation rate is small compared with the temperature. With the increase of temperature, the material yield strength and tensile strength drops rapidly, and their difference decreases.(4)The main reason of tension-compression asymmetry is texture, the deformation temperature and deformation rate by influencing the twin deformation and deformation mechanism to affect the tension and compression asymmetry. The faster the deformation rate, the higher the temperature, compressive asymmetry is more significant.