Ferritic-austenitic duplex steels demonstrate a complex deformational behavior even in the absence of mechanical loads. Purely thermal cycling in the temperature interval from 20°C to 900°C can cause either accumulation of inelastic strains (thermal ratchetting) or plastic shakedown, depending on microstructure morphology and/or the strength and thermal properties of the constituting phases. In this paper, a study is undertaken on duplex steel containing nitrogen, including experimental and theoretical analyses at microscopic and macroscopic levels. High-precision dilatometry and roughness measurements are accompanied by thorough numerical simulations based on different microstructural models.
Thermal Loading of Duplex Steels
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division January 22, 2001; revision received March 12, 2002. Associate Editor: D. McDowell.
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Silberschmidt, V. V., Werner , E. A., and Messner, C. (December 31, 2002). "Thermal Loading of Duplex Steels ." ASME. J. Eng. Mater. Technol. January 2003; 125(1): 56–64. https://doi.org/10.1115/1.1525250
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