Effect of Heat Treatment on Microstructure and Stress Rupture Properties of a Ni–Mo–Cr–Fe Base Corrosion-Resistant Superalloy

The influences of heat treatment and test condition on the microstructure and stress rupture properties of a Ni–Mo–Cr–Fe base corrosion-resistant superalloy have been investigated in this paper. Optical microscope and scanning electron microscope were employed for the microstructure observation, and...

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Veröffentlicht in:Acta metallurgica sinica : English letters 2019-01, Vol.32 (1), p.116-126
Hauptverfasser: Liu, Tao, Yang, Mei, Wang, Jun-Song, Dong, Jia-Sheng, Wang, Li, Lou, Lang-Hong
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Yang, Mei
Wang, Jun-Song
Dong, Jia-Sheng
Wang, Li
Lou, Lang-Hong
description The influences of heat treatment and test condition on the microstructure and stress rupture properties of a Ni–Mo–Cr–Fe base corrosion-resistant superalloy have been investigated in this paper. Optical microscope and scanning electron microscope were employed for the microstructure observation, and X-ray diffraction, electron probe micro-analyzer, and transmission electron microscope were used for phase determination. It was found that the grain size increased and the volume fractions of initial M 6 C carbides decreased along with the increase in solution treatment temperature. When tested at 650 °C/320 MPa, the stress rupture lives decreased with the increase in solution treatment temperature, but the stress rupture lives increased slightly at first and then decreased for the samples solution heat treated at 1220 °C when tested at 700 °C/240 MPa. The elongations showed the descendent trends under these two conditions. The stress rupture life and elongation for the aged samples all showed a noticeable improvement at 650 °C/320 MPa, but there was no noticeable improvement at 700 °C/240 MPa. The reasons can be attributed to the grain size, test conditions, and the initial and secondary carbides.
doi_str_mv 10.1007/s40195-018-0837-y
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Optical microscope and scanning electron microscope were employed for the microstructure observation, and X-ray diffraction, electron probe micro-analyzer, and transmission electron microscope were used for phase determination. It was found that the grain size increased and the volume fractions of initial M 6 C carbides decreased along with the increase in solution treatment temperature. When tested at 650 °C/320 MPa, the stress rupture lives decreased with the increase in solution treatment temperature, but the stress rupture lives increased slightly at first and then decreased for the samples solution heat treated at 1220 °C when tested at 700 °C/240 MPa. The elongations showed the descendent trends under these two conditions. The stress rupture life and elongation for the aged samples all showed a noticeable improvement at 650 °C/320 MPa, but there was no noticeable improvement at 700 °C/240 MPa. 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Sin. (Engl. Lett.)</addtitle><description>The influences of heat treatment and test condition on the microstructure and stress rupture properties of a Ni–Mo–Cr–Fe base corrosion-resistant superalloy have been investigated in this paper. Optical microscope and scanning electron microscope were employed for the microstructure observation, and X-ray diffraction, electron probe micro-analyzer, and transmission electron microscope were used for phase determination. It was found that the grain size increased and the volume fractions of initial M 6 C carbides decreased along with the increase in solution treatment temperature. When tested at 650 °C/320 MPa, the stress rupture lives decreased with the increase in solution treatment temperature, but the stress rupture lives increased slightly at first and then decreased for the samples solution heat treated at 1220 °C when tested at 700 °C/240 MPa. The elongations showed the descendent trends under these two conditions. The stress rupture life and elongation for the aged samples all showed a noticeable improvement at 650 °C/320 MPa, but there was no noticeable improvement at 700 °C/240 MPa. The reasons can be attributed to the grain size, test conditions, and the initial and secondary carbides.</description><subject>Alloys</subject><subject>Carbides</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Chromium</subject><subject>Corrosion and Coatings</subject><subject>Corrosion resistance</subject><subject>Electron probes</subject><subject>Grain boundaries</subject><subject>Grain size</subject><subject>Heat treating</subject><subject>Iron</subject><subject>Materials Science</subject><subject>Metallic Materials</subject><subject>Microstructure</subject><subject>Molybdenum</subject><subject>Morphology</subject><subject>Nanotechnology</subject><subject>Nickel</subject><subject>Optical microscopes</subject><subject>Organometallic Chemistry</subject><subject>Solution heat treatment</subject><subject>Spectroscopy/Spectrometry</subject><subject>Superalloys</subject><subject>Temperature</subject><subject>Trends</subject><subject>Tribology</subject><issn>1006-7191</issn><issn>2194-1289</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp1kE1OwzAUhC0EEqVwAHaWWBv8lyZeQtVSpBZQW9aW4zgoVRsH21lkh8QRuCEnwSFIrNiM7aeZ78kDwCXB1wTj9MZzTESCMMkQzliKuiMwokRwRGgmjsEomiYoJYKcgjPvd_FFeZKOwMesLI0O0JZwYVSAWxf1YOo4qeGq0s764FodWmegqgu4Cc54D9dt8zN6drYxLlTG9wQFH6uv98-VjTJ1UeYG3ilv4NS6CKpsjdbGVz6oyN-0Man2e9udg5NS7b25-D3H4GU-204XaPl0_zC9XSLNEhEQLzQvU5ETlTNcKK6pViRhOaG5xhPFkgyzCcsYEwmNN1XgTJO0SHWRMU4LzsbgauA2zr61xge5s62r40pJBaNMYCGS6CKDq_-7d6aUjasOynWSYNl3LYeuZexa9l3LLmbokPHRW78a90f-P_QNWmmGDg</recordid><startdate>20190101</startdate><enddate>20190101</enddate><creator>Liu, Tao</creator><creator>Yang, Mei</creator><creator>Wang, Jun-Song</creator><creator>Dong, Jia-Sheng</creator><creator>Wang, Li</creator><creator>Lou, Lang-Hong</creator><general>The Chinese Society for Metals</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope></search><sort><creationdate>20190101</creationdate><title>Effect of Heat Treatment on Microstructure and Stress Rupture Properties of a Ni–Mo–Cr–Fe Base Corrosion-Resistant Superalloy</title><author>Liu, Tao ; 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subjects Alloys
Carbides
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Corrosion and Coatings
Corrosion resistance
Electron probes
Grain boundaries
Grain size
Heat treating
Iron
Materials Science
Metallic Materials
Microstructure
Molybdenum
Morphology
Nanotechnology
Nickel
Optical microscopes
Organometallic Chemistry
Solution heat treatment
Spectroscopy/Spectrometry
Superalloys
Temperature
Trends
Tribology
title Effect of Heat Treatment on Microstructure and Stress Rupture Properties of a Ni–Mo–Cr–Fe Base Corrosion-Resistant Superalloy
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