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Iranian Journal of Materials Forming، جلد ۹، شماره ۳، صفحات ۵۲-۶۱
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عنوان انگلیسی Effect of Cold-Rolling and Annealing Treatments on the Microstructure and Mechanical Properties of AISI 309S Austenitic Stainless Steel
چکیده انگلیسی مقاله Microstructural evolutions and mechanical properties of a cold-rolled 309S austenitic stainless steel were investigated after reversion annealing in the temperature ranges of 700-1000°C for 3-20 min. The specimen was first cold-rolled at room temperature to 90% thickness reduction. The microstructure was analyzed by optical and SEM methods and the mechanical behavior was studied by tensile tests and hardness measurement. The results depicted that negligible strain-induced ά-martensite was formed after cold-rolling. In addition, elongated austenite grains were observed after deformation followed by annealing below 700°C which was a signature of the recovery process. The recrystallization of the deformed austenite was dominant above 800°C, while recrystallization followed by grain growth were seen at 900°C. Moreover, the significant grain growth was observed at 1000°C. The optimum annealing temperature and time for achievement of a uniform recrystallized grain were at 800°C for 3 min which resulted in considerable grain refinement. The grain refinement led to improvement of mechanical properties of investigated austenitic stainless steel. The hardness value of refined austenite grains was 195% greater than that of the as-received steel. Finally, current work can shed some light on the effect of grain refinement on the control of microstructural and mechanical property of austenitic stainless steels.
کلیدواژه‌های انگلیسی مقاله Austenitic stainless steel, Annealing, recrystallization, Mechanical property
نویسندگان مقاله M. Eskandari |
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

I. Khosravi-Bigdeli |
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

S.R. Alavi Zaree |
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

M. Yeganeh |
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

نشانی اینترنتی https://ijmf.shirazu.ac.ir/article_6703_31ebb876a53b81a73183b5f0955c2e80.pdf
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