Research on Microstructural and Performance Evolution of IN783 Bolt in Service
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J. Wang
Xiaodong Du born in February 1966, Doctor, professor, doctoral supervisor, head of metal materials engineering department, school of materials science and engineering, Hefei university of technology. He graduated from Hefei university of technology with a master's degree in materials science in 1993, and then taught in the university. He graduated from Hefei university of technology with a doctor's degree in materials science in 2006. Mainly engaged in the research and development of high-performance metal materials.
Abstract
In this paper, the evolution of the microstructural and performance of IN783 hightemperature bolts in service was studied. The results showed that under high-temperature service environment, with the increase of service time, the superalloy of IN783 bolt and the precipitation quantity of second phase increased. The second phase mainly existed in the form of particles and rods, which were distributed in an obvious oriented way. With the extension of service time, the strength of the alloy increased, but the hardness decreased, the plasticity and toughness decreased significantly, so it is difficult for the IN783 high-temperature bolts to reach the normal level of safe service. Therefore, the IN783 high-temperature bolts that have been in service for a long time should be strictly supervised and replaced appropriately to reduce losses.
Kurzfassung
Die vorliegende Arbeit untersucht die Entwicklung des Gefüges und der Leistungsfähigkeit von Bolzen aus IN783 während des Hochtemperaturbetriebs. Die Ergebnisse zeigten, dass beim Einsatz in Hochtemperaturanwendungen mit fortschreitender Betriebszeit die Menge an ausgeschiedener Sekundärphase in dem aus der Superlegierung IN783 bestehenden Bolzen zunahm. Die Sekundärphase trat hauptsächlich in Form von Partikeln und Stäben auf, die eindeutig gerichtet verteilt waren. Mit zunehmender Betriebszeit kam es bei der Legierung zu einem Anstieg der Festigkeit, während die Härte abnahm und Plastizität und Zähigkeit deutlich zurückgingen, sodass die Bolzen aus IN783 im Hochtemperatureinsatz nur schwer den Anforderungen des sicheren Betriebs genügen. Aus diesem Grund sollten Bolzen aus IN783 in Hochtemperaturanwendungen nach längeren Betriebszeiten einer strengen Kontrolle unterliegen und entsprechend ausgetauscht werden, um Ausfälle zu reduzieren.
About the author
Xiaodong Du born in February 1966, Doctor, professor, doctoral supervisor, head of metal materials engineering department, school of materials science and engineering, Hefei university of technology. He graduated from Hefei university of technology with a master's degree in materials science in 1993, and then taught in the university. He graduated from Hefei university of technology with a doctor's degree in materials science in 2006. Mainly engaged in the research and development of high-performance metal materials.
Acknowledgment
The author acknowledges the financial support from Science and Technology Project of Datang Electric Power Group KY-2018-03, Lvsi Project of Datang Electric Power Group (KY-2019).
Danksagung
Der Autor dankt der Datang Electric Power Group für die finanzielle Unterstützung im Rahmen des Science and Technology Project KY-2018 – 03, Lvsi Project of Datang Electric Power Group (KY-2019).
References / Literatur
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Articles in the same Issue
- Contents
- Editorial
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- Metallographic Preparation of Single Powder Particles
- Research on Microstructural and Performance Evolution of IN783 Bolt in Service
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- Picture of the Month
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Articles in the same Issue
- Contents
- Editorial
- Development of a Two-Stage Etching Procedure for Grain Analysis of Intermetallic Iron Aluminides (Fe-Al-Ta)
- Metallographic Preparation of Single Powder Particles
- Research on Microstructural and Performance Evolution of IN783 Bolt in Service
- Failure analysis
- Liquation Cracking in a Row 1 Turbine Vane
- Picture of the Month
- Picture of the Month
- People
- Heinz-Hubert Cloeren
- PM-News
- PM-News
- Meeting Diary
- Meeting Diary
