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Quantification of vanadium precipitates in HSLA steel by synchrotron X-ray absorption spectroscopy (XAS)

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Published/Copyright: December 24, 2015
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Materials Testing
From the journal Materials Testing Volume 58 Issue 1

Abstract

This study demonstrates how the synchrotron X-ray absorption spectroscopy can be applied for the quantification of precipitation in high strength low alloyed steel. The fraction of vanadium in different forms of compounds, as well as in the solid solution, was measured using a linear combination fit of the spectral weights. The technique confirms substantial enhancement of precipitation by lowering the cooling rate. A significant fraction of vanadium atoms of over 0.6 remained in the solid solution when the cooling rate was as high as 60 K × s−1. In contrast, the precipitation of vanadium was almost completed by decreasing the cooling rate to 0.1 K × s−1. The results corresponded to the proof by scanning transmission electron microscopy.

Kurzfassung

Dieser Artikel beschreibt, wie die Synchrotron-Röntgenabsorptionsspektroskopie zur Quantifizierung der Ausscheidungen von Vanadium in hochfesten, niedriglegierten Stählen verwendet werden kann. Der Anteil an Vanadium in Form von verschiedenen Ausscheidungen, wie auch in Lösung wurde unter Verwendung eines linearen Kombinations-Fit der spektralen Gewichte gemessen. Die Technik bestätigt den erheblichen Anstieg der Ausscheidungen durch die Absenkung der Kühlrate. Ein signifikanter Anteil von über 0,6 der Vanadiumatome blieb in Lösung, wenn die Kühlrate 60 K × s−1 betrug. Im Gegensatz dazu war die Vanadiumausscheidung bei einer Verringerung der Abkühlgeschwindigkeit auf 0,1 K × s−1 fast vollständig abgeschlossen. Die Ergebnisse wurden mit Hilfe von Untersuchungen am Rastertransmissionsmikroskop bestätigt.

§Correspondence Address, Assistant Prof. Dr.-Ing. Piyada Suwanpinij, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand. E-mail:

Assistant Prof. Dr.-Ing. Piyada Suwanpinij, born 1980, achieved her BEng degree in Metallurgical Engineering at Chulalongkorn University, Thailand, and her MMet in Advanced Metallurgy at University of Sheffield, UK. She made her doctoral degree in Ferrous Metallurgy at RWTH Aachen University in Germany. She has experience in the modeling of phase transformation and characterization of high strength steels as well as other metals. The application of synchrotron radiation for material characterization is one of her feature interest. Now, she is a lecturer at the The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand.

Dipl.-Ing. Hans Henning Dickert, born 1983, holds a diploma in Materials Science from TU Clausthal in Germany. He has long standing experience in steel development and processing during working as a scientific co-worker and group leader of the research group Materials Processing at the Department of Ferrous Metallurgy, RWTH Aachen University, Germany. Here he also worked on a Thai-German Seed Fund project. Currently, he works as a development engineer in the Department for Application Development at Georgsmarienhütte GmbH, Georgsmarienhütte, Germany.

Dr. Nirawat Thammajak, born 1984, achieved his BSc degree in Chemistry at Chiangmai University, Thailand, and received his doctoral degree in Inorganic Chemistry from the University of Oxford, UK. With long standing experience in chemistry research and experiments with synchrotron radiation and neutron from leading facilities around the world, he became a scientist for the X-ray absorption spectroscopy (XAS) beamline at the Synchrotron Light Research Institute (SLRI), Nakhon Rachasima, Thailand.

Associate Prof. Prasonk Srichareonchai, born 1955, received a BEng degree in Metallurgical Engineering from Chulalongkorn University, Bangkok, Thailand and a MEng degree in Metallurgy from Waseda University, Japan, as well as a doctoral degree in Metallurgy from the University of Tokyo, Japan. Guaranteed by the Thailand Metallurgist Award, he is an expert in various topics in metallurgy including surface coating and thermomechanical controlled process especially for microalloyed steels. He is a lecturer at the Department of Metallurgical Engineering, Chulalongkorn University, Bangkok, Thailand.

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Published Online: 2015-12-24
Published in Print: 2016-01-05

© 2016, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Quantification of vanadium precipitates in HSLA steel by synchrotron X-ray absorption spectroscopy (XAS)
  5. Optimization of the wear behavior of uncoated, TiN and AlTiN coated cold work tool steel 1.2379 using response surface methodology
  6. Sensitivity analysis of the residual stress state in friction stir welding of high strength aluminum alloy
  7. Probability of detection of minute defects by ultrasonic automated testing equipment in view of Bayesian inference
  8. Parameters in lock-in thermography of CFRP laminates
  9. Effect of tool material on microstructure and mechanical properties in friction stir welding
  10. Microstructures of an AZ61 wrought magnesium alloy fabricated by a novel SPD process using thermomechanical simulation
  11. Corrosion resistance and microstructure of alloy 625 weld overlay on ASTM A516 grade 70
  12. Effects of post-curing on the thermo-mechanical behavior and the chemical structure of highly filled phenolic molding compounds
  13. Effect of pressing temperature on the wear resistance of a Co-based Cr-Mo powder alloy produced by hot pressing
  14. Deep micro-hole drilling of Hardox 500 by electro-discharge machining
  15. Optimization of thin-wall structures using hybrid gravitational search and Nelder-Mead algorithm
  16. Structural design of vehicle components using gravitational search and charged system search algorithms
  17. Electrical resistivity and strength properties of sodium hydroxide contaminated soil solidified with cement
https://doi.org/10.3139/120.110802

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Quantification of vanadium precipitates in HSLA steel by synchrotron X-ray absorption spectroscopy (XAS)
  5. Optimization of the wear behavior of uncoated, TiN and AlTiN coated cold work tool steel 1.2379 using response surface methodology
  6. Sensitivity analysis of the residual stress state in friction stir welding of high strength aluminum alloy
  7. Probability of detection of minute defects by ultrasonic automated testing equipment in view of Bayesian inference
  8. Parameters in lock-in thermography of CFRP laminates
  9. Effect of tool material on microstructure and mechanical properties in friction stir welding
  10. Microstructures of an AZ61 wrought magnesium alloy fabricated by a novel SPD process using thermomechanical simulation
  11. Corrosion resistance and microstructure of alloy 625 weld overlay on ASTM A516 grade 70
  12. Effects of post-curing on the thermo-mechanical behavior and the chemical structure of highly filled phenolic molding compounds
  13. Effect of pressing temperature on the wear resistance of a Co-based Cr-Mo powder alloy produced by hot pressing
  14. Deep micro-hole drilling of Hardox 500 by electro-discharge machining
  15. Optimization of thin-wall structures using hybrid gravitational search and Nelder-Mead algorithm
  16. Structural design of vehicle components using gravitational search and charged system search algorithms
  17. Electrical resistivity and strength properties of sodium hydroxide contaminated soil solidified with cement
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