Evolution of Microstructure and Texture during Warm Rolling Of a Duplex Steel

Bhattacharjee, P P and Zaid, M and Sathiaraj, G D and Bhadak, B (2014) Evolution of Microstructure and Texture during Warm Rolling Of a Duplex Steel. Metallurgical and Materials Transactions A, 45 (4). pp. 2180-2191. ISSN 1073-5623

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Abstract

The effect of warm rolling on the evolution of microstructure and texture in a duplex stainless steel (DSS) was investigated. For this purpose, a DSS steel was warm rolled up to 90 pct reduction in thickness at 498 K, 698 K, and 898 K (225 °C, 425 °C, and 625 °C). The microstructure with an alternate arrangement of deformed ferrite and austenite bands was observed after warm rolling; however, the microstructure after 90 pct warm rolling at 498 K and 898 K (225 °C and 625 °C) was more lamellar and uniform as compared to the rather fragmented and inhomogeneous structure observed after 90 pct warm rolling at 698 K (425 °C). The texture of ferrite in warm-rolled DSS was characterized by the presence of the RD (〈011〉//RD) and ND (〈111〉//ND) fibers. However, the texture of ferrite in DSS warm rolled at 698 K (425 °C) was distinctly different having much higher fraction of the RD-fiber components than that of the ND-fiber components. The texture and microstructural differences in ferrite in DSS warm rolled at different temperatures could be explained by the interaction of carbon atoms with dislocations. In contrast, the austenite in DSS warm rolled at different temperatures consistently showed pure metal- or copper-type deformation texture which was attributed to the increase in stacking fault energy at the warm-rolling temperatures. It was concluded that the evolution of microstructure and texture of the two constituent phases in DSS was greatly affected by the temperature of warm rolling, but not significantly by the presence of the other phase

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IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Additional Information:

The authors would like to gratefully acknowledge Dr. G. Malakondaiah, former Director, DMRL, Hyderabad, for his kind permission to prepare the starting alloy used in the present research work using the facilities at DMRL, Hyderabad, and Dr. Raghu and Mr. Satheesh, scientists at DMRL, Hyderabad, for their kind support in preparing the experimental alloy. Helpful discussion with Professor N. Tsuji of Kyoto University, Japan, is also gratefully acknowl- edged.

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

Team Library

Date Deposited:

16 Dec 2014 11:51

Last Modified:

04 Mar 2015 10:48

URI:

http://raiithold.iith.ac.in/id/eprint/1159