The effect of strain path reversal on high-angle boundary formation by grain subdivision in a model austenitic steel

被引：37
|
作者：
Sun, L. [1 ]
Muszka, K. [1 ]
Wynne, B. P. [1 ]
Palmiere, E. J. [1 ]
机构：
[1] Univ Sheffield, Inst Microstruct & Mech Proc Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
SCRIPTA MATERIALIA | 2011年 / 64卷 / 03期
基金：
英国工程与自然科学研究理事会;
关键词：
Austenite; Dislocation boundaries; Hot working; Strain path; Electron backscattering diffraction (EBSD); INTERSTITIAL-FREE STEEL; ULTRAFINE FERRITE; HOT TORSION; FCC METALS; INDUCED PRECIPITATION; ALUMINUM; RECRYSTALLIZATION; DEFORMATION; ORIENTATION; MICROSTRUCTURE;
D O I：
10.1016/j.scriptamat.2010.10.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of large strain and strain path reversal on deformation microstructure development in austenite below recrystallization temperature were studied by hot torsion using an Fe-30 wt% Ni model alloy. Results show that high-angle boundaries (HABs) can be generated by both dislocation accumulation and subgrain rotation. Multiple strain reversals lead to less well-developed HABs in the original grains compared to single reversal deformed to the same strain. This is attributed to subgrain rotation mechanism being less effective at small strains. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码：280 / 283
页数：4
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