文章信息/Info

Title:

Mechanical Behavior of Nanostructured Metallic Materials Prepared by Severe Plastic Deformation

作者:

尹雁飛1; 2; 賈蔚菊2; 李思蘭2; 毛成亮2; 應揚2; 毛小南2; 趙永慶1; 2

(1. 西北工業大學材料科學與工程學院，陜西 西安 710072) (2. 西北有色金屬研究院，陜西 西安 710016)

Author(s):

YIN Yanfei1; 2;  JIA Weijv2;  LI Silan2;  MAO Chengliang2; YING Yang2;  MAO Xiaonan2;  ZHAO Yongqing1; 2

(1. School of Material Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China) (2. Northwest Institute for Nonferrous Metal Research, Xi‘an 710016, China)

關鍵詞:

納米金屬材料; 劇烈塑性變形; 晶粒細化; 加工硬化; 疲勞性能

Keywords:

nanostructured metallic materials;  severe plastic deformation;  grain refinement;  strain hardening;  fatigue property

DOI:

10.7502/j.issn.1674-3962.201901002

文獻標志碼:

A

摘要:

通過劇烈塑性變形（SPD）技術制備的納米金屬材料，其顯微組織和力學性能明顯不同于普通粗晶（CG）金屬材料。根據細化部位的不同，將SPD技術分為塊體納米化技術和表面納米化技術。概述了當前較為成熟的SPD技術和兩類SPD技術的組織細化原理，總結了通過SPD技術制備的納米金屬材料的組織特點和晶粒細化機制，從強度、塑性及加工硬化、斷裂機制和疲勞性能等方面，綜述了國內外SPD制備納米金屬材料的力學行為相關研究進展，最后結合納米金屬材料的晶粒長大現象和結構穩定性探討了SPD制備的納米金屬材料未來的研究方向，以期為兼具高強度和良好穩定性的納米金屬材料的研制提供理論支持。

Abstract:

Nanostructured metallic materials prepared by severe plastic deformation (SPD) techniques not only have unique microstructure, but also demonstrate obviously different mechanical properties compared with conventional coarse�瞘rained (CG) materials. In this paper, SPD techniques were divided into block nanocrystallization techniques and surface nanocrystallization techniques according to the difference of refinement parts. The relatively mature SPD techniques and the microstructure refinement principle of two types of SPD techniques were outlined. The microstructure characteristics and grain refinement mechanism of nanostructured metallic materials prepared by SPD technology were summarized. The recent progress on mechanical behavior of nanostructured metallic metals worldwide was reviewed, in terms of strength, plasticity and strain hardening, fracture mechanism and fatigue property. In addition, the future research direction of nanostructured metallic materials in the aspect of its grain growth and structural stability was also discussed, in order to provide theoretical support for developing nanostructured metallic materials with high strength and excellent structural stability.