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Effect of Y addition on the structural transformation and thermal stability of Ti-22Al-25Nb alloy produced by mechanical alloying

  • Mehmet Emin Çetin

    Mehmet Emin Çetin completed his BSc degree at Kocaeli University, Kocaeli in 2010 and his MSc degree at Karadeniz Technical University, Trabzon in 2012. He received his PhD degree in Mechanical Engineering from Karadeniz Technical University, Trabzon, Turkey in 2017. His research interests are mechanical tests, powder metallurgy, titanium alloys and finite element analysis.

     EMAIL logo     , Gökhan Polat

    Gökhan Polat completed his BSc degree at Yıldız Technical University, İstanbul in 2010 and his MSc degree at Yıldız Technical University, İstanbul in 2013. He received his PhD degree in Metallurgy and Materials Engineering at the Middle East Technical University, Ankara, Turkey in 2020. His research interests are solidification, mechanical alloying, and characterization of alloys.

         , Mustafa Tekin

    Mustafa Tekin completed his BSc degree at İstanbul Technical University, İstanbul in 2014 and his MSc degree at İstanbul Technical University, İstanbul in 2017. His research interests are mechanical alloying, material testing, nanoindentation and nanocrystalline metals.

         , Ahmet Burçin Batibay

    Ahmet Burçin Batıbay completed his BSc degree at Cumhuriyet University, Sivas in 2010 and MSc degree at İstanbul Technical University, İstanbul in 2013. He received his PhD degree in Materials Science and Engineering from Afyonkarahisar Kocatepe University, Afyonkarahisar, Turkey in 2021. His research interests are mechanical alloying, titanium alloys, biomaterials and nanocrystalline metals.

         and Hasan Kotan

    Hasan Kotan completed his BSc degree at Sakarya University, Sakarya in 2006 and his MSc degree at the University of Pittsburgh, Pennsylvania in 2010. He received his PhD degree in Materials Science and Engineering from North Carolina State University, North Carolina, USA in 2013. His research interests are nanocrystalline metals, stainless steel, thermal stability, mechanical alloying.
Published/Copyright: July 29, 2021
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Materials Testing
From the journal Materials Testing Volume 63 Issue 7

Abstract

In this study, a Ti-22Al-25Nb alloy with nanocrystalline structure was produced by high energy mechanical alloying (HEMA) and 1 at.-% yttrium was added as a thermal stabilizer. The as-milled samples were annealed at various temperatures up to 900 °C in a protective gas atmosphere, and the samples were allowed to cool to room temperature in the furnace. The phase transformations and microstructural changes as a function of the annealing temperatures and alloy compositions were studied using room- and high-temperature X-ray diffraction (XRD), focused ion beam microscopy (FIB), and scanning electron microscopy (SEM). The mechanical properties of the samples were interpreted based on the hardness results and their correlation with the microstructures. The results showed that the as-milled nanocrystalline structure of Ti-22Al-25Nb alloy increased from 3.4 nm to 350 nm after annealing at 800 °C due to the high driving force induced by the large grain boundary area. Consequently, the as-milled hardness of the Ti-22Al-25Nb alloy dropped from 7.63 ± 0.18 GPa to 5.37 ± 0.28 GPa. The grain size stability of the Ti-22Al-25Nb alloy after annealing at elevated temperature was ensured through the addition of yttrium. Thus, the grain size remained at the level of 125 nm, and the hardness value was maintained at around 6.98 ± 0.43 GPa after annealing at 800 °C.

Keywords: Titanium alloys; alloy development; mechanical alloying; annealing; thermal stability
Assist. Prof. Dr. Mehmet Emin Çetin Necmettin Erbakan University Faculty of Aeronautics and Astronautics Department of Aerospace Engineering 42140, Konya, Turkey

About the authors

Assist. Prof. Dr. Mehmet Emin Çetin

Mehmet Emin Çetin completed his BSc degree at Kocaeli University, Kocaeli in 2010 and his MSc degree at Karadeniz Technical University, Trabzon in 2012. He received his PhD degree in Mechanical Engineering from Karadeniz Technical University, Trabzon, Turkey in 2017. His research interests are mechanical tests, powder metallurgy, titanium alloys and finite element analysis.

Gökhan Polat

Gökhan Polat completed his BSc degree at Yıldız Technical University, İstanbul in 2010 and his MSc degree at Yıldız Technical University, İstanbul in 2013. He received his PhD degree in Metallurgy and Materials Engineering at the Middle East Technical University, Ankara, Turkey in 2020. His research interests are solidification, mechanical alloying, and characterization of alloys.

Mustafa Tekin

Mustafa Tekin completed his BSc degree at İstanbul Technical University, İstanbul in 2014 and his MSc degree at İstanbul Technical University, İstanbul in 2017. His research interests are mechanical alloying, material testing, nanoindentation and nanocrystalline metals.

Ahmet Burçin Batibay

Ahmet Burçin Batıbay completed his BSc degree at Cumhuriyet University, Sivas in 2010 and MSc degree at İstanbul Technical University, İstanbul in 2013. He received his PhD degree in Materials Science and Engineering from Afyonkarahisar Kocatepe University, Afyonkarahisar, Turkey in 2021. His research interests are mechanical alloying, titanium alloys, biomaterials and nanocrystalline metals.

Hasan Kotan

Hasan Kotan completed his BSc degree at Sakarya University, Sakarya in 2006 and his MSc degree at the University of Pittsburgh, Pennsylvania in 2010. He received his PhD degree in Materials Science and Engineering from North Carolina State University, North Carolina, USA in 2013. His research interests are nanocrystalline metals, stainless steel, thermal stability, mechanical alloying.

Acknowledgment

The authors gratefully acknowledge the financial support from Necmettin Erbakan University through the BAP project 181216001.

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Published Online: 2021-07-29
Published in Print: 2021-07-30

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

Articles in the same Issue

  1. Frontmatter
  2. Materials testing for joining and additive manufacturing applications
  3. Bending strength of ceramic compounds bonded with silicate-based glass solder
  4. Effect of Y addition on the structural transformation and thermal stability of Ti-22Al-25Nb alloy produced by mechanical alloying
  5. Materialography
  6. Grain evolution during hot ring rolling of as-cast 42CrMo ring billets
  7. Mechanical testing
  8. DCPD and strain gauge based calibration procedure for evaluation of low temperature creep behavior
  9. Corrosion testing
  10. Corrosion behavior of the heat affected zone in a 316 L pipeline weld
  11. Non-destructive testing/Radiography
  12. Neutron darkfield imaging of fiber composites
  13. Materials testing for welding and additive manufacturing applications
  14. Investigation of in situ synthesized TiB2 particles in iron-based composite coatings processed by hybrid submerged arc welding
  15. Mechanical testing/Numerical simulations
  16. Mechanical behavior of butt curved adhesive joints subjected to bending
  17. Wear testing/Numerical simulations
  18. Finite element modeling of glass particle reinforced epoxy composites under uniaxial compression and sliding wear
  19. Mechanical testing
  20. Effect of the cooling process on the mechanical properties and microstructural behavior of extruded AZ31 and AM50 Mg alloys
  21. Materials testing for welding and additive manufacturing applications
  22. Weldability of austempered rail steel using the flash-butt process
  23. Effect of tool diameter ratio on the microstructural characteristics of a solid-state processed aluminum based metal matrix composite
  24. Analysis of physical and chemical properties
  25. A density measurement device for solid objects with uneven geometry
  26. Numerical simulations
  27. Experimental and numerical study of an overlay composite absorber plate material for a solar air heater
https://doi.org/10.1515/mt-2020-0099
Keywords for this article
Titanium alloys; alloy development; mechanical alloying; annealing; thermal stability

Articles in the same Issue

  1. Frontmatter
  2. Materials testing for joining and additive manufacturing applications
  3. Bending strength of ceramic compounds bonded with silicate-based glass solder
  4. Effect of Y addition on the structural transformation and thermal stability of Ti-22Al-25Nb alloy produced by mechanical alloying
  5. Materialography
  6. Grain evolution during hot ring rolling of as-cast 42CrMo ring billets
  7. Mechanical testing
  8. DCPD and strain gauge based calibration procedure for evaluation of low temperature creep behavior
  9. Corrosion testing
  10. Corrosion behavior of the heat affected zone in a 316 L pipeline weld
  11. Non-destructive testing/Radiography
  12. Neutron darkfield imaging of fiber composites
  13. Materials testing for welding and additive manufacturing applications
  14. Investigation of in situ synthesized TiB2 particles in iron-based composite coatings processed by hybrid submerged arc welding
  15. Mechanical testing/Numerical simulations
  16. Mechanical behavior of butt curved adhesive joints subjected to bending
  17. Wear testing/Numerical simulations
  18. Finite element modeling of glass particle reinforced epoxy composites under uniaxial compression and sliding wear
  19. Mechanical testing
  20. Effect of the cooling process on the mechanical properties and microstructural behavior of extruded AZ31 and AM50 Mg alloys
  21. Materials testing for welding and additive manufacturing applications
  22. Weldability of austempered rail steel using the flash-butt process
  23. Effect of tool diameter ratio on the microstructural characteristics of a solid-state processed aluminum based metal matrix composite
  24. Analysis of physical and chemical properties
  25. A density measurement device for solid objects with uneven geometry
  26. Numerical simulations
  27. Experimental and numerical study of an overlay composite absorber plate material for a solar air heater
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