Effects of deformation temperature and rate on compressive deformation behaviour of Y112 die cast aluminum alloy in semi-solid state
(1.重庆市重庆工学院材料科学与工程学院
2.College of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, China)
2.College of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, China)
Abstract: The semi-solid compression deformation behaviour of Y112 die casting aluminum alloy with nondendritic structure obtained under the semi-solid isothermal treatment condition of 570 ℃ and 120 min, was investigated by means of Gleeble-1500 thermal-mechanical simulator. The results show that, when the strain is lower than 0.8, along with the compression strain increasing, the compression stress firstly increases rapidly, then decreases gradually. Under the condition of different deformation temperatures and deformation rates, the maximium compression stress is obtained simultaneously when the strain is 0.07 approximately. Furthermore, when the deformation rate keeps a constant, the compression stress decreases along with the deformation temperature increasing, and when the deformation temperature keeps a constant, the compression stress increases along with the deformation rate increasing.
Key words: semi-solid isothermal treatment; nondendritic structure; Y112 aluminum alloy; compression deformation