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Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel

  • Ömer Faruk Murathan

    Mr. Ömer Faruk Murathan was born in 1989, received his BSc from the Metallurgical and Materials Engineering Department, Faculty of Engineering, Atilim University, Ankara, Turkey, in 2013. He earned his MSc degrees at Gazi University, Ankara, Turkey in 2015. Currently, he is a PhD Student at the Department of Metallurgical and Materials Engineering, Faculty of Technology, Gazi University, Ankara, Turkey. His research interests are heat treatments of steel and cast iron.

         , Kemal Davut

    Assist. Prof. Dr. Kemal Davut was born in 1982 and works at the at the Department of Metallurgical and Materials Engineering, Faculty of Engineering, Atilim University, Ankara, Turkey. He received his BSc and MSc degrees from the Department of Metallurgical and Materials Engineering, Middle East Technical University in 2004 and 2006, respectively. He earned his PhD degree in 2013 at the RWTH Aachen University. His areas of interest include crystallographic texture analysis, EBSD technique, SEM, quantitative metallography, magnetic Barkhausen noise, heat treatment of ferrous alloys and advanced high strength steels.

         and Volkan Kilicli

    Assist. Prof. Dr. Volkan Kilicli was born in 1980 and works at the Department of Metallurgical and Materials Engineering, Faculty of Technology, Gazi University, Ankara, Turkey. He graduated in Metallurgy Education from Gazi University, Ankara, Turkey, in 2001. He received his MSc and PhD degrees from Gazi University, Ankara, Turkey in 2004 and 2010, respectively. His research interests include the heat treatment of steel and cast iron, semi-solid processing of aluminum alloys, self- healing metallic materials and metal matrix composites.

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Published/Copyright: February 10, 2021
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Materials Testing
From the journal Materials Testing Volume 63 Issue 1

Abstract

In this study, the effect of austenitizing temperatures and low-temperature isothermal heat treatment (below martensite start temperature) on the microstructure and mechanical properties of AISI 9254 high silicon spring steel has been investigated. Experimental studies show that ultra-fine carbide-free bainite, tempered martensite and carbon enriched retained austenite could be observed in isothermally heat-treated samples where the as-received sample consisted of fine pearlite. A high tensile strength of ~2060 MPa, a total elongation of ~8 %, and absorbed energy of 105 J were achieved in a commercial high-Si steel by austempering below the Ms temperature. A good combination of strength and ductility has been obtained in prolonged austempering below the martensite start temperature (225 °C) from an austenitizing temperature of 870 °C.

Keywords: High silicon steel; austenitizing temperatures; carbide-free bainite; bainite; martensite
Dr. Volkan Kilicli Department of Metallurgical and Materials Engineering, Faculty of Technology, Gazi University, 06560, Teknikokullar/Ankara Turkey

About the authors

Ömer Faruk Murathan

Mr. Ömer Faruk Murathan was born in 1989, received his BSc from the Metallurgical and Materials Engineering Department, Faculty of Engineering, Atilim University, Ankara, Turkey, in 2013. He earned his MSc degrees at Gazi University, Ankara, Turkey in 2015. Currently, he is a PhD Student at the Department of Metallurgical and Materials Engineering, Faculty of Technology, Gazi University, Ankara, Turkey. His research interests are heat treatments of steel and cast iron.

Kemal Davut

Assist. Prof. Dr. Kemal Davut was born in 1982 and works at the at the Department of Metallurgical and Materials Engineering, Faculty of Engineering, Atilim University, Ankara, Turkey. He received his BSc and MSc degrees from the Department of Metallurgical and Materials Engineering, Middle East Technical University in 2004 and 2006, respectively. He earned his PhD degree in 2013 at the RWTH Aachen University. His areas of interest include crystallographic texture analysis, EBSD technique, SEM, quantitative metallography, magnetic Barkhausen noise, heat treatment of ferrous alloys and advanced high strength steels.

Dr. Volkan Kilicli

Assist. Prof. Dr. Volkan Kilicli was born in 1980 and works at the Department of Metallurgical and Materials Engineering, Faculty of Technology, Gazi University, Ankara, Turkey. He graduated in Metallurgy Education from Gazi University, Ankara, Turkey, in 2001. He received his MSc and PhD degrees from Gazi University, Ankara, Turkey in 2004 and 2010, respectively. His research interests include the heat treatment of steel and cast iron, semi-solid processing of aluminum alloys, self- healing metallic materials and metal matrix composites.

Acknowledgment

The authors wish to express their gratitude for the financial support of Gazi University Scientific Research Fund (Project code: GÜBAP 07/2013-01). The authors’ gratitude is also extended to the Metal Forming Center of Excellence at Atilim University for providing electron microscopy, X-RD and quenching dilatometer facilities.

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Published Online: 2021-02-10

© 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany

Articles in the same Issue

  1. Frontmatter
  2. Overview
  3. Technology in the 21st Century – The role of materials and materials testing
  4. Materials testing for welding and additive manufacturing applications
  5. Effect of laser inclination angle on mechanical properties of Hastelloy X processed by selective laser melting
  6. Component-Oriented testing
  7. Heat source model for electron beam welding of nickel-based superalloys
  8. Materialography
  9. Effects of Ti-bearing inclusions on intragranular ferrite nucleation
  10. Mechanical testing/Materialography
  11. Effect of extruded low-density polyethylene on the microstructural and mechanical properties of hot-press produced 3105 aluminum composites
  12. Production-Oriented testing/Additive manufacturing
  13. 10.1515/mt-2020-0004
  14. Materialography
  15. Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel
  16. Materials testing for production technologies/Non-destructive testing
  17. Automation of pipe defect detection and characterization by structured light
  18. Wear testing
  19. Wear resistance of HVOF sprayed NiSiCrFeB, WC-Co/NiSiCrFeB, WC-Co, and WC-Cr3C2-Ni rice harvesting blades
  20. Materials testing for welding and additive manufacturing applications
  21. Effect of heat treatment on mechanical properties of 3D printed polylactic acid parts
  22. Wear testing
  23. Friction and wear properties of heavy load truck composite brake linings
  24. Mechanical testing/Wear testing
  25. Effect of Lanthanum on mechanical and wear properties of high-pressure die-cast Mg-3Al-3Sn-3Sb alloy
  26. Production-Oriented testing
  27. A novel graphene-based Fe3O4 nanocomposite for magnetic particle inspection
  28. Materials testing for welding and additive manufacturing applications
  29. Effect of shielding gas combination on microstructure and mechanical properties of MIG welded stainless steel 316
https://doi.org/10.1515/mt-2020-0007
Keywords for this article
High silicon steel; austenitizing temperatures; carbide-free bainite; bainite; martensite

Articles in the same Issue

  1. Frontmatter
  2. Overview
  3. Technology in the 21st Century – The role of materials and materials testing
  4. Materials testing for welding and additive manufacturing applications
  5. Effect of laser inclination angle on mechanical properties of Hastelloy X processed by selective laser melting
  6. Component-Oriented testing
  7. Heat source model for electron beam welding of nickel-based superalloys
  8. Materialography
  9. Effects of Ti-bearing inclusions on intragranular ferrite nucleation
  10. Mechanical testing/Materialography
  11. Effect of extruded low-density polyethylene on the microstructural and mechanical properties of hot-press produced 3105 aluminum composites
  12. Production-Oriented testing/Additive manufacturing
  13. 10.1515/mt-2020-0004
  14. Materialography
  15. Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel
  16. Materials testing for production technologies/Non-destructive testing
  17. Automation of pipe defect detection and characterization by structured light
  18. Wear testing
  19. Wear resistance of HVOF sprayed NiSiCrFeB, WC-Co/NiSiCrFeB, WC-Co, and WC-Cr3C2-Ni rice harvesting blades
  20. Materials testing for welding and additive manufacturing applications
  21. Effect of heat treatment on mechanical properties of 3D printed polylactic acid parts
  22. Wear testing
  23. Friction and wear properties of heavy load truck composite brake linings
  24. Mechanical testing/Wear testing
  25. Effect of Lanthanum on mechanical and wear properties of high-pressure die-cast Mg-3Al-3Sn-3Sb alloy
  26. Production-Oriented testing
  27. A novel graphene-based Fe3O4 nanocomposite for magnetic particle inspection
  28. Materials testing for welding and additive manufacturing applications
  29. Effect of shielding gas combination on microstructure and mechanical properties of MIG welded stainless steel 316
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