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Year 2020, Volume: 6 Issue: 2, 102 - 107, 31.07.2020

Abstract

References

  • [1] C. J. Van Tyne, D. K. Matlock, and J. G. Speer, “Microallyed Forging Steels” International Forging Congress, (2008) 189-197.
  • [2] M. Hajisafari, S. Nategh, H. Yoozbashizadeh, A. Ekrami, “Improvement in Mechanical Properties of Microalloyed Steel 30MSV6 by a Precipitation Hardening Process” J. of Iron and Steel Research. (2013)66-73, DOI: 10.1016/S1006-706X(13)60100-4
  • [3] Xiao-Huai Xue, Yi-Yin Shan, and Song-Nian Lou, “Microstructure Characteristic of Low Carbon Microalloyed Steels Produced by Thermo-Mechanical Controlled Process” Materials Science &Engineering A. 438-440 (2006) 285-287, DOI: 10.1016/j.msea.2006.02.064
  • [4] M. Niikura, M. Fujioka, Y. Adachi, A. Matsukura, T. Yokota, Y. Shirota, and Y. Hagiwara, “New Concepts for Ultra Refinement of Grain Size in Super Metal Project” J. Mater. Process. Technol. 117 (2001) 341-346, DOI: 10.1016/S0924-0136(01)00800-7
  • [5] E. Esenera , E. Sönmeza , M. Özsoyb and M. Firatb,∗ “Determining Springback Behavior of High-Strength Steels via Channel Forming Process” Acta Physica Polonica A. 132 (2017)1010-1012, DOI: 10.12693/APhysPolA.132.1010
  • [6] V. Onar, S. Aslanlar and N. Akkaş, “Effect of Welding Current on Tensile–Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding” Acta Physica Polonica A 132(2017) 822-824, DOI: 10.12693/APhysPolA.132.822
  • [7] H. Xie, L-X. Du, J. Hu and R.D.K. Misra, “Microstructure and mechanical properties of a novel 1000 MPa grade TMCP low carbon microalloyed steel with combination of high strength and excellent toughness” Mater. Sci. Eng. (2014) A612 123-130, DOI: 10.1016/j.msea.2014.06.033
  • [8] E. Paul DeGarmo, J T. Black Ronald, A. Kohser, Materials and Process in Manufacturing, Ninth Edition, 2003 John Wiley & Sons, Inc.
  • [9] European Committee for Standardization, “Metallic materials - Tensile testing - Part 1: Method of test at room temperature” (ISO 6892-1), 2016.
  • [10] Danijela A. Skobir, “High-Strength Low-Alloy (HSLA) Steels” Materials and Technology. 45 (2011) 4 295-301.
  • [11] H. Najafi, , R. Jafar, S. Asgari, “As-cast mechanical properties of vanadium/niobium microalloyed steels” Materials Science and Engineering. (2008) A 408 1-7, DOI: 10.1016/j.msea.2007.08.057
  • [12] Hoda S. El-Faramawy, Saeed N. Ghali, Mamdouh M. Eissa, “Effect of Titanium Addition on Behavior of Medium Carbon Steel” Journal of Minerals and Materials Characterization and Engineering. (2012) 11 1108-1112, DOI: 10.4236/jmmce.2012.1111118
  • [13] C. L. Davis, M. J. Balart, M. Strangwood, “Fracture Behaviour In Medium-Carbon Ti–V–N And V–N Microalloyed Ferritic-Pearlitic And Bainitic Forging Steels With Enhanced Machinability” Materials Science and Engineering A. 328 48-57, DOI: 10.1016/s0921-5093(01)01679-3

An Investigation of the Formability, Mechanical Properties and Microstructure of Niobium and Niobium-Titanium Microalloyed Steels

Year 2020, Volume: 6 Issue: 2, 102 - 107, 31.07.2020

Abstract

Microalloyed steels are widely used in the automotive sector due to their formability and strength. One example application is rim manufacturing where the cost of wheel is expected to be low.

In this study, formability, microstructure and mechanical properties of low carbon steels containing Niobium and Niobium-Titanium as microalloying elements were investigated.

The measurements showed that the tensile strength of non-alloyed steel was 433.5 MPa, the yield strength was 292.6 MPa, the tensile strength of Nb alloyed steel was 489 MPa and the yield strength was 385.4 MPa. These values indicate that the tensile strength increase of about 12 % and the yield strength increase of 24 % were obtained. Also for Nb-Ti added steel, the tensile strength was 591.3 MPa and the yield strength was 462.6 MPa. These correspond to 27 % increase in the tensile strength and 37 % increase in the yield strength. Furthermore, elongation values were measured as 27.6 % in non-alloyed steel, 32 % in Nb-added steel, and 28 % in Nb-Ti added steel. In the microstructure analysis, the grain size of Nb and Nb-Ti added alloys were found to be approximately 50 % smaller than the grain size of unalloyed steel.

These results indicated that we achieved high elongation values and improved mechanical properties for Nb and Nb-Ti added steel. Furthermore, we managed to hold the elongation value at 27.7 % while achieving higher yield and tensile strengths and formability by adding a small amount of Nb-Ti to the steel.

References

  • [1] C. J. Van Tyne, D. K. Matlock, and J. G. Speer, “Microallyed Forging Steels” International Forging Congress, (2008) 189-197.
  • [2] M. Hajisafari, S. Nategh, H. Yoozbashizadeh, A. Ekrami, “Improvement in Mechanical Properties of Microalloyed Steel 30MSV6 by a Precipitation Hardening Process” J. of Iron and Steel Research. (2013)66-73, DOI: 10.1016/S1006-706X(13)60100-4
  • [3] Xiao-Huai Xue, Yi-Yin Shan, and Song-Nian Lou, “Microstructure Characteristic of Low Carbon Microalloyed Steels Produced by Thermo-Mechanical Controlled Process” Materials Science &Engineering A. 438-440 (2006) 285-287, DOI: 10.1016/j.msea.2006.02.064
  • [4] M. Niikura, M. Fujioka, Y. Adachi, A. Matsukura, T. Yokota, Y. Shirota, and Y. Hagiwara, “New Concepts for Ultra Refinement of Grain Size in Super Metal Project” J. Mater. Process. Technol. 117 (2001) 341-346, DOI: 10.1016/S0924-0136(01)00800-7
  • [5] E. Esenera , E. Sönmeza , M. Özsoyb and M. Firatb,∗ “Determining Springback Behavior of High-Strength Steels via Channel Forming Process” Acta Physica Polonica A. 132 (2017)1010-1012, DOI: 10.12693/APhysPolA.132.1010
  • [6] V. Onar, S. Aslanlar and N. Akkaş, “Effect of Welding Current on Tensile–Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding” Acta Physica Polonica A 132(2017) 822-824, DOI: 10.12693/APhysPolA.132.822
  • [7] H. Xie, L-X. Du, J. Hu and R.D.K. Misra, “Microstructure and mechanical properties of a novel 1000 MPa grade TMCP low carbon microalloyed steel with combination of high strength and excellent toughness” Mater. Sci. Eng. (2014) A612 123-130, DOI: 10.1016/j.msea.2014.06.033
  • [8] E. Paul DeGarmo, J T. Black Ronald, A. Kohser, Materials and Process in Manufacturing, Ninth Edition, 2003 John Wiley & Sons, Inc.
  • [9] European Committee for Standardization, “Metallic materials - Tensile testing - Part 1: Method of test at room temperature” (ISO 6892-1), 2016.
  • [10] Danijela A. Skobir, “High-Strength Low-Alloy (HSLA) Steels” Materials and Technology. 45 (2011) 4 295-301.
  • [11] H. Najafi, , R. Jafar, S. Asgari, “As-cast mechanical properties of vanadium/niobium microalloyed steels” Materials Science and Engineering. (2008) A 408 1-7, DOI: 10.1016/j.msea.2007.08.057
  • [12] Hoda S. El-Faramawy, Saeed N. Ghali, Mamdouh M. Eissa, “Effect of Titanium Addition on Behavior of Medium Carbon Steel” Journal of Minerals and Materials Characterization and Engineering. (2012) 11 1108-1112, DOI: 10.4236/jmmce.2012.1111118
  • [13] C. L. Davis, M. J. Balart, M. Strangwood, “Fracture Behaviour In Medium-Carbon Ti–V–N And V–N Microalloyed Ferritic-Pearlitic And Bainitic Forging Steels With Enhanced Machinability” Materials Science and Engineering A. 328 48-57, DOI: 10.1016/s0921-5093(01)01679-3
There are 13 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Research Articles
Authors

Ali Sancaktar This is me 0000-0001-5854-2548

Sebahattin Kırtay 0000-0003-4193-0020

Aliye Arabacı 0000-0003-1209-8618

Publication Date July 31, 2020
Submission Date April 14, 2020
Acceptance Date June 11, 2020
Published in Issue Year 2020 Volume: 6 Issue: 2

Cite

APA Sancaktar, A., Kırtay, S., & Arabacı, A. (2020). An Investigation of the Formability, Mechanical Properties and Microstructure of Niobium and Niobium-Titanium Microalloyed Steels. International Journal of Computational and Experimental Science and Engineering, 6(2), 102-107.