Flow stress and microstructure of the cold-rolled IF-steel

被引：30

作者：

Li, BL ^{[1
]}

Cao, WQ ^{[1
]}

Liu, Q ^{[1
]}

Liu, W ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 356卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

IF-steel; misorientation; flow stress; Hall-Petch relation; CHANGING STRAIN-RATE; DEFORMATION; ALUMINUM; ENERGY; MISORIENTATIONS; ORIENTATION; EVOLUTION; BEHAVIOR;

D O I：

10.1016/S0921-5093(02)00889-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dependence of flow stress (measured by tensile experiment) on the microstructure is discussed based on the Hall-Petch (H-P) relationship in interstitial-free steel cold-rolled to different reductions of 10-90%. The microstructure was characterized by TEM with semi-automated Kikuchi pattern analysis method. The significant effect of misorientation on the flow stress was found experimentally. The linear dependence of the slope of H-P relation on the average sub(grain) boundary misorientation is derived based on the work hardening dislocation mechanism. The modified H-P relation, i.e. sigma(f) = sigma(0) + K-H((theta(av)/15)/d(subgrain))(0.5) is proposed to describe the effect of average misorientation on flow stress. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：37 / 42

页数：6

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