Dynamic recrystallisation during isothermal hot deformation in a titanium modified austenitic stainless steel

被引：1
作者：
Mandal, Sumantra [1 ]
Bhaduri, A. K. [1 ]
Raj, Baldev [1 ]
Sarma, V. Subramanya [2 ]
机构：
[1] IGCAR, Met & Mat Grp, Kalpakkam 603102, TN, India
[2] IIT Madras, Dept Met & Mat Engn, Madras, Tamil Nadu, India
来源：
RECRYSTALLIZATION AND GRAIN GROWTH IV | 2012年 / 715-716卷
关键词：
Dynamic recrystallisation; hot deformation; microstructural evolution; electron back-scatter diffraction; ANNEALING TWINS; FLOW BEHAVIOR; NUCLEATION; MECHANISMS;
D O I：
10.4028/www.scientific.net/MSF.715-716.140
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The paper discusses the microstructural evolution during dynamic recrystallisation (DRX) of a titanium-modified austenitic stainless steel (alloy D9). Isothermal hot compression tests were conducted in a Gleeble thermo-mechanical simulator in the temperature range 1173-1373K to various strains at a constant strain rate of 0.1 and 1 s(-1). The extent of DRX increased with increase in strain and temperature. Nucleation of new DRX grains was found to occur by bulging of parent grain boundary. A continuous sub-grain rotation around the original grain boundaries, which would lead to the formation of DRX nucleus in sub-grain structures, could not be confirmed from the present study. Fractions of Sigma 3 boundaries increased almost linearly with increase in area fraction of DRX. The generation of this Sigma 3 boundary was accounted for in the formation of annealing twins during DRX. The possible role of annealing twins on DRX in alloy D9 is also discussed.
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页码：140 / +
页数：2
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