异质结构变形镁合金的研究进展

Recent Progress on Wrought Magnesium Alloys with Heterogeneous Structure

摘要:

异质结构由机械性能存在显著差异的软区和硬区组成，变形过程中软区和硬区不同的机械性能可诱发额外的强韧化机制，从而影响材料的综合机械性能。近年来，异质结构镁合金的制备工艺和性能改善机制研究受到了材料工作者的广泛关注。综述了双相结构、双峰结构、异质片层结构和梯度结构4种典型异质结构变形镁合金的制备工艺和性能特点，并讨论了异质结构镁合金的发展现状以及该领域面临的挑战，为新型异质结构镁合金的应用指明了方向。

Abstract:

Heterostructure consists of soft and hard regions with significant differences in mechanical properties， which can induce additional strengthening and toughening mechanisms during deformation and contribute to enhancing mechanical properties of materials. Recently， the processing technologies and the mechanisms of mechanical property improvement of heterostructure Mg alloys have been widely reported. The present paper reviewed the processing technologies and mechanical properties of four kinds of heterogeneous Mg alloys， i.e.， dual-phase structure， bimodal structure， heterogeneous lamella structure and gradient structure， and the development status and the challenges emerged in this field were also discussed.