Journal
MATERIALS CHARACTERIZATION
Volume 62, Issue 4, Pages 432-437Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2011.02.005
Keywords
Austenitic stainless steel; Warm rolling; Dynamic recrystallization; Strengthening; Tensile behaviour
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Funding
- National Natural Science Foundation of China [50901013]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-07CH11358]
- Iowa State University of Science and Technology
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The effect of multiple rolling in the temperature interval of 500-1000 degrees C on the microstructure and the tensile behaviour of an austenitic stainless steel was studied. The structural changes during warm-to-hot working were characterized by the elongation of original grains towards the rolling axis and the development of new fine grains. The fraction of fine grains and the average grain size increased with increasing the rolling temperature. The multiple hot rolling resulted in significant strengthening. The offset yield strength approached 1030 MPa in the specimen processed at 500 degrees C, while a strength of 480 MPa was obtained after rolling at 1000 degrees C. The relationship between the deformation microstructures and the tensile behaviour is discussed. (C) 2011 Elsevier Inc. All rights reserved.
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