Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental research on direct extrusion for dual-phase magnesium lithium alloy

Authors： Jiang Bingchun Wang Shuping Liu Fangfang Tan Lianyao Li Zhenzhen

Unit： Guangdong University of Science and Technology

KeyWords： magnesium lithium alloy direct extrusion extrusion ratio grain refinement Deform-3D

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(1):116-120

Abstract：

For magnesium lithium alloy LZ92, the deformation mode of direct extrusion was numerically simulated by Deform-3D finite element software, and the influences of different extrusion ratios of 10, 20 and 30 on equivalent stress and equivalent strain were analyzed. According to the simulation analysis result of direct extrusion, the hot extrusion test was carried out to observe the microstructure and mechanical properties of the deformed samples. The results show that with the increase of extrusion ratio, the equivalent strain increases, and the sample homogeneity is enhanced. Therefore,the equivalent strain is in linear growth with a growth rate of 0.5, and the maximum equivalent strain is up to 3. At the same time, the more sufficient the recrystallization of magnesium lithium alloy LZ92 is, the more obvious the grain refinement is, and the grain size is refined from 45 μm to 15 μm. LZ92 deformation magnesium lithium alloy has excellent mechanical properties. With the increase of extrusion ratio, the yield strength, tensile strength and deformation significantly increase. The tensile strength gradually increases to 203.1 MPa which is 76% more than the cast state, and the yield strength grows linearly at a speed of 40 MPa.

Funds：

广东省青年创新人才类项目（2015KQNCX192）；广东科技学院重点项目（GKY-2015KYZD-3)；广东科技学院一般项目（GKY-2015KYYB-9）

姜炳春（1987-），男，硕士 E-mail：jiangbingchun_2008@163.com

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