扭转变形制备的梯度结构镁合金微结构与力学性能研究进展

Research Progress on Microstructure and Mechanical Properties of Gradient Structure Magnesium Alloys Prepared by Torsion Deformation

传统镁合金的强度和塑性相对较低,且难以同步提高,很大程度上限制了其在工程中的应用。已有大量研究表明,呈梯度结构的晶体缺陷可有效提升材料强度,优化其韧性,实现强度与韧性的完美契合。通过扭转变形的方式可向镁合金材料内部引入晶体缺陷梯度结构,实现各梯度层之间相互作用与相互协调,从而极大优化和改善镁合金材料的整体性能。综述了采用扭转变形方式制备梯度镁合金材料的研究背景、制备原理、微观组织特点以及性能影响,论述了利用扭转变形方式优化镁合金材料性能的应用前景。

The strength and ductility of traditional magnesium alloys are still relatively low,and it is difficult to improve at the same time,which greatly limits the application in engineering.A large number of studies show that the crystal defects with a gradient structure can effectively increase the strength of the material,optimize its toughness and achieve a perfect fit between strength and toughness.Through torsion deformation,a crystal defect gradient structure can be introduced into the magnesium alloy material to realize the interaction and coordination between the gradient layers,thereby greatly optimize and improve the overall performance of the magnesium alloy material.The research background,preparation principle,microstructure characteristics and performance effects of using torsion deformation method to prepare gradient magnesium alloy materials were summarized.The application prospect of using torsion deformation method to optimize the properties of magnesium alloy materials was discussed.