剧烈塑性变形:不仅是晶粒细化（英文）

发布时间：2018-03-27 05:20

本文选题：剧烈塑性变形　切入点：等通道转角挤压　出处：《材料与冶金学报》2015年04期

【摘要】：剧烈塑性变形在生产超细晶材料方面已经显示了巨大的潜力.虽然大量的研究集中在晶粒细化上,等通道转角挤压和高压扭转等剧烈塑性变形过程正在越来越多地被应用于其他领域诸如粉末固结,利用变形引发相变制作新颖结构与成分,获得多相及多尺度材料以及固态回收技术.本文引用我们近十年来的研究成果以介绍剧烈塑性变形在晶粒细化之外的诸多应用.特别是利用剧烈塑性变形颗粒固结来制取大块铝、钛、铝/钛双相合金和铝基纳米复合材料,利用机械激活和强制合金化来获得包括面心立方在内的新型钛结构,利用剧烈塑性变形引发的相变来制备纳米晶beta钛合金,以及利用等通道转角挤压来固态回收钛合金切削料.最后,对存在的挑战和机会进行了探讨.
[Abstract]:Severe plastic deformation has shown great potential in the production of ultrafine grained materials. Although much research has focused on grain refinement, Intense plastic deformation processes, such as equal channel angular extrusion and high pressure torsion, are increasingly being used in other fields such as powder consolidation, and new structures and components are fabricated by deformation-induced phase transformation. Multiphase and multiscale materials and solid state recovery techniques have been obtained. In this paper, we cite our research results in recent ten years to introduce many applications of severe plastic deformation in addition to grain refinement. To make large pieces of aluminum, Titanium, aluminum / titanium biphasic alloys and aluminum matrix nanocomposites were prepared by mechanical activation and forced alloying to obtain new titanium structures, including face-centered cubic (FCC), and phase transformation induced by severe plastic deformation was used to prepare nanocrystalline beta titanium alloys. And the equal channel angular extrusion is used to recover the titanium alloy cutting material. Finally, the challenges and opportunities are discussed.
【作者单位】：墨尔本大学机械工程学院;
【基金】：supported partially by the Australian Research Council with the ARC Centre of excellence for Design in Light Metals and partially by the Defence Materials Technology Centre
【分类号】：TG301

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