锻压技术

等径角挤压法制备块体超细晶材料的研究现状及展望

英文标题：Research status and future expectation on equal channel angular pressing

作者：刘睿孙康宁毕见强

单位：山东大学材料液态结构及其遗传性教育部重点实验室工程陶瓷重点实验室山东大学材料液态结构及其遗传性教育部重点实验室工程陶瓷重点实验室山东大学材料液态结构及其遗传性教育部重点实验室工程陶瓷重点实验室山东济南250061 山东济南250061 山东济南250061

关键词：块体超细晶材料大塑性变形(SPD) 等径角挤压(ECAP)

分类号：TG376

出版年,卷(期):页码：2005,30(6):85-89

摘要：

对块体超细晶材料的研究是近年来的一大热点。大塑性变形法(Sever Plastic Deformation,SPD)之一的等径角挤压(Eaqual channel angular pressing,ECAP)法,可以在室温或不太高的温度下,将材料的晶粒由几微米至几十微米细化至200nm~400nm,材料的性能得到提高,并且ECAP法有着相对简单的制备工艺及较好的细化效果。本文介绍了ECAP处理对提高材料的强度、疲劳寿命、超塑性等的贡献以及影响ECAP工艺的因素,分析了ECAP目前存在的问题,并对ECAP的应用前景进行了展望。

Research on bulk nanometer materials is brought to experts' attention recently.Sever Plastic Deformation(SPD) is an unique technology of producing bulk nanometer materials.Equal channel angular pressing(ECAP),one of SPD methods,provides a convenient procedure for introducing ultra-fine grain sizes into materials.ECAP is able to refine grain into 200nm~400nm,and improve mechanical properties of materials at the room temperature or at the relative low temperature.This paper is about the factors of ECAP contributions in terms of enhancing strength,fatigue limit and super-plastic property.Both the problem and application in the future are mentioned.

基金项目：

山东省科技攻关项目资助(032050115)

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