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Long term heating effects at 1173 K and 1273 K on microstructural rejuvenation in various modified alloys based on GTD-111

  • Vara Vacharatanon

    Vara Vacharatanon, born in 1994, is a graduate student in the Department of Defense Engineering and Technology, Engineering Faculty, Chulalongkorn University, Bangkok, Thailand. Her research scope is related to the heat treatment and microstruc-tural characterization of nickel-base superalloys. She received her Bachelor’s degree in Metallurgical Engineering and Materials at Chulalongkorn University, Bangkok, Thailand in 2016.

    , Napat Kiatwisarnkij

    Napat Kiatwisarnkij, born in 1993, is a PhD student in the Department of Metallurgical Engineering, Chulalongkorn University, Bangkok, Thailand. Her research scope is related to the development and characterization of nickel-base superalloys. She received her Bachelor’s degree in Physics in 2016 and a Master’s degree in Metallurgical Engineering and Materials in 2020 at Chulalongkorn University, Bangkok, Thailand.

    , Gobboon Lothongkum

    Prof. Dr.-Ing. Gobboon Lothongkum, born in 1960, is a Professor and member of the Innovative Metals Research Unit. He served as Head of the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand from 2015 to 2019. He received his Dr.-Ing. degree from the Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg, Germany and the International Welding Engineer Certificate of the International Institute of Welding in 1994 and 2006, respectively. His areas of expertise include corrosion of metals and alloys, welding and metal joining, stainless steel and high temperature materials.

    , Nuthaporn Nuttayasakul

    Assistant Prof. Dr. Col. Nuthaporn Nuttayasakul, born in 1975, is currently teaching at the Chulachomklao Royal Military Acadamy, Nakhon Nayok, Thailand from 2005 to 2021. He received his PhD in Civil engineering from Virginia Polytechnic and State University, USA in 2005. His research areas of expertise include research in steel design, military bridge design, cold-formed steel design and applications.

    , Jiaqian Qin

    Dr. Jiaqian Qin, born in 1983, is a Researcher at the Metallurgy and Materials Science Research Institute, Chulalongkorn University (CU), Thailand. He received his PhD in Physics from Sichuan University in 2010. Before joining CU in 2012, he worked as a JSPS Postdoctoral Researcher at Ehime University, Japan for two years. Qin’s research interests include the design and application of nanomaterials in surface coating, catalysts and energy storage.

    and Panyawat Wangyao

    Assistant Prof. Dr. Panyawat Wangyao, born in 1971, is a Member of the Innovative Metals Research Unit. He served as Head of the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand from 2011 to 2015. He received his PhD in Physical Metallurgy from the Technical University of Kosice, Slovakia, in 2002. His research areas of expertise include high temperature materials such as superalloys, super stainless steel as well as powder metallurgy of alloys.

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From the journal Materials Testing

Abstract

This research work studied and evaluated the effects of reheat treatment conditions, which consisted of solution treatment at a temperature of 1448 K for 14.4 ks, followed by air cooling and precipitate aging at a temperature of 1118 K for 86.4 ks, on the microstructural rejuvenation or refurbishment of various modified alloys based on the cast nickel base superalloy, GTD-111 with aluminum, nickel and/or cobalt additions after long term heating at temperatures of 1173 K and 1273 K for 1440 ks. From the results obtained, it was found that the reheat treatment conditions applied are more suitable for microstructures after long term heating at a temperature of 1173 K. However, such reheat treatment conditions could not fully return reheat treated microstructures to microstructures similar to those of previous research work. It seems that the selected solutioning temperatures and/or times were not sufficient to completely dissolve all coarse gamma prime particles after long term heating for all samples with alloying additions. Typical size and area fractions of the gamma prime particles of the reheat treated microstructures are very similar to those of the original alloyed ones but with lower values, especially those related to the size of the gamma prime particles.


Assistant Prof. Dr. Panyawat Wangyao Innovative Metals Research Unit, Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

About the authors

Vara Vacharatanon

Vara Vacharatanon, born in 1994, is a graduate student in the Department of Defense Engineering and Technology, Engineering Faculty, Chulalongkorn University, Bangkok, Thailand. Her research scope is related to the heat treatment and microstruc-tural characterization of nickel-base superalloys. She received her Bachelor’s degree in Metallurgical Engineering and Materials at Chulalongkorn University, Bangkok, Thailand in 2016.

Napat Kiatwisarnkij

Napat Kiatwisarnkij, born in 1993, is a PhD student in the Department of Metallurgical Engineering, Chulalongkorn University, Bangkok, Thailand. Her research scope is related to the development and characterization of nickel-base superalloys. She received her Bachelor’s degree in Physics in 2016 and a Master’s degree in Metallurgical Engineering and Materials in 2020 at Chulalongkorn University, Bangkok, Thailand.

Prof. Dr.-Ing. Gobboon Lothongkum

Prof. Dr.-Ing. Gobboon Lothongkum, born in 1960, is a Professor and member of the Innovative Metals Research Unit. He served as Head of the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand from 2015 to 2019. He received his Dr.-Ing. degree from the Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg, Germany and the International Welding Engineer Certificate of the International Institute of Welding in 1994 and 2006, respectively. His areas of expertise include corrosion of metals and alloys, welding and metal joining, stainless steel and high temperature materials.

Assistant Prof. Dr. Col. Nuthaporn Nuttayasakul

Assistant Prof. Dr. Col. Nuthaporn Nuttayasakul, born in 1975, is currently teaching at the Chulachomklao Royal Military Acadamy, Nakhon Nayok, Thailand from 2005 to 2021. He received his PhD in Civil engineering from Virginia Polytechnic and State University, USA in 2005. His research areas of expertise include research in steel design, military bridge design, cold-formed steel design and applications.

Dr. Jiaqian Qin

Dr. Jiaqian Qin, born in 1983, is a Researcher at the Metallurgy and Materials Science Research Institute, Chulalongkorn University (CU), Thailand. He received his PhD in Physics from Sichuan University in 2010. Before joining CU in 2012, he worked as a JSPS Postdoctoral Researcher at Ehime University, Japan for two years. Qin’s research interests include the design and application of nanomaterials in surface coating, catalysts and energy storage.

Assistant Prof. Dr. Panyawat Wangyao

Assistant Prof. Dr. Panyawat Wangyao, born in 1971, is a Member of the Innovative Metals Research Unit. He served as Head of the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand from 2011 to 2015. He received his PhD in Physical Metallurgy from the Technical University of Kosice, Slovakia, in 2002. His research areas of expertise include high temperature materials such as superalloys, super stainless steel as well as powder metallurgy of alloys.

Acknowledgement

The authors would like to gratefully acknowledge the financial support provided by Chulalongkorn Academic Advancement into its 2nd Century Project (CUAASC).

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Published Online: 2021-08-18
Published in Print: 2021-08-31

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

Downloaded on 19.3.2024 from https://www.degruyter.com/document/doi/10.1515/mt-2020-0113/html
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