Stored energy of a severely deformed interstitial free steel

被引：81
作者：
Hazra, Sujoy S. [1 ]
Gazder, Azdiar A. [1 ]
Pereloma, Elena V. [1 ]
机构：
[1] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 524卷 / 1-2期
关键词：
Equal channel angular extrusion (ECAE); Equal channel angular pressing (ECAP); Differential scanning calorimetry (DSC); Electron back-scattering diffraction (EBSD); Steel; SEVERE PLASTIC-DEFORMATION; CHANNEL ANGULAR EXTRUSION; HIGH PURITY IRON; X-RAY-DIFFRACTION; LOW-CARBON; IF-STEEL; RECRYSTALLIZATION BEHAVIOR; HYDROSTATIC-PRESSURE; MECHANICAL ATTRITION; THERMAL-STABILITY;
D O I：
10.1016/j.msea.2009.06.033
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
ATi-stabilised IF steel subjected to room temperature equal channel angular pressing (ECAP) for 8 passes, route B-C was further cold rolled to 25, 50 and 95% thickness reductions. The evolution of bulk stored energy (350-600 J mol(-1)) and the associated thermal behaviour was investigated by differential scanning calorimetry (DSC). Local stored energy (5-140 J mol(-1)) was measured using microhardness, electron back-scattering diffraction (EBSD) and X-ray line profile analysis. The higher stored energy values via calorimetry correspond to energy release from all sources of strain in the material volume as well as Ti precipitation during annealing. An apparent activation energy of 500-550 J mol(-1) suggests sluggish recrystallisation due to excess Ti in solid solution. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：158 / 167
页数：10
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