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International Journal of Iron & Steel Society of Iran
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Tavoosi, M., Nourbakhsh, M., Hosseini, S. (2016). Preparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel. International Journal of Iron & Steel Society of Iran, 13(2), 31-39.
M. Tavoosi; M. Nourbakhsh; S.R. Hosseini. "Preparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel". International Journal of Iron & Steel Society of Iran, 13, 2, 2016, 31-39.
Tavoosi, M., Nourbakhsh, M., Hosseini, S. (2016). 'Preparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel', International Journal of Iron & Steel Society of Iran, 13(2), pp. 31-39.
Tavoosi, M., Nourbakhsh, M., Hosseini, S. Preparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel. International Journal of Iron & Steel Society of Iran, 2016; 13(2): 31-39.

Preparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel

Article 6, Volume 13, Issue 2, Summer and Autumn 2016, Page 31-39  XML PDF (6.72 MB)
Document Type: Research Paper
Authors
M. Tavoosi email ; M. Nourbakhsh; S.R. Hosseini
Department of Material Engineering, Malek- Ashtar University of Technology (MUT), Shahin-Shahr, Isfahan, Iran
Abstract
The development of nano/ultrafine bainitic structure in AISI 52100 steel was the goal of this study. For this purpose,
the AISI 52100 the specimens were austenitized at 1050 °C for 60 min followed by low-temperature austempering
treatment at different temperatures and times. The austempered samples were characterized using field emission
scanning electron microscopy (FESEM), X-ray diffraction (XRD) and tension test. According to achieved results,
the microstructure of AISI 52100 steel after the austempering treatment consisted of ultrafine bainitic ferrite plates
and retained austenite with two morphologies of micrometer-block and fine film. At the austempering temperature
up to 250 °C, the micrometer-blocky morphology of austenite completely vanished from the microstructure, and
the strength and ductility increased to about 2000 MPa and 7 %, respectively. By increasing the austempering
temperature to 300 °C, the strength and ductility reduced (to about 1808 MPa and 3 %) simultaneously as a result
of changing in the shape and size of bainite phase.
Keywords
Nanostructures; 52100 steel; X-ray diffraction; Mechanical properties
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