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A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy / Soran, Birosca

Materials Science and Engineering: A, Volume: 718, Pages: 19 - 32

Swansea University Author: Soran, Birosca

Abstract

Up to date, IN713C Nickel-based superalloy has been continued to be the best alloy candidate for turbocharger wheel applications due to its adequate fatigue property and resistance to degradation under harsh operating environments. Throughout this study, three different batches of as-cast IN713C nic...

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Published in: Materials Science and Engineering: A
ISSN: 09215093
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa38885
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spelling 2018-04-24T14:02:05.6228336 v2 38885 2018-02-27 A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy 3445603fcc2ff9d27b476a73b223a507 0000-0002-8380-771X Soran Birosca Soran Birosca true false 2018-02-27 EEN Up to date, IN713C Nickel-based superalloy has been continued to be the best alloy candidate for turbocharger wheel applications due to its adequate fatigue property and resistance to degradation under harsh operating environments. Throughout this study, three different batches of as-cast IN713C nickel based superalloys with different microstructures including columnar, equiaxed and transition microstructures were investigated. Strain control Low Cycle fatigue (LCF) tests were conducted for the three different microstructures, achieving fatigue life between 100 and runout at 100,000 cycles, depending on the testing parameters. The fracture mechanics and failure mechanism were correlated to the alloy's microstructure, texture and chemical composition under various LCF conditions using optical microscopy, SEM, EDX and EBSD. In the current study an exact correlation between alloy's microstructure/microtexture and LCF endurance is established. The results showed that equiaxed microstructure has a superior fatigue life than the transition microstructure by 10% and columnar microstructure by > 200% at a given temperature and strain rate. This large discrepancy was mainly due to the grain size differences between the studied microstructures. Here, it was evidenced that the grain size controls the dendrites length. It is also demonstrated that all microstructures exhibited a longer fatigue life at room temperature than at 650 °C, doubling or tripling the fatigue life of the tested IN713C. Furthermore, the high presence of precipitates between dendritic arms in all three microstructures was found to have great influence on crack propagation path. It was apparent that segregated carbides in between dendritic arms caused secondary crack initiation and crack path undulations during the LCF tests. Journal Article Materials Science and Engineering: A 718 19 32 09215093 Fatigue, IN713C, microstructure, investment casting, superalloy 1 1 2018 2018-01-01 10.1016/j.msea.2018.01.083 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2018-04-24T14:02:05.6228336 2018-02-27T09:03:12.0570813 College of Engineering Engineering J. Salvat Cantó 1 S. Winwood 2 K. Rhodes 3 S. Birosca 4 Soran Birosca 0000-0002-8380-771X 5 0038885-27022018090534.pdf canto2018(3).pdf 2018-02-27T09:05:34.0830000 Output 2514164 application/pdf Accepted Manuscript true 2019-01-31T00:00:00.0000000 true eng
title A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
spellingShingle A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
Soran, Birosca
title_short A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
title_full A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
title_fullStr A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
title_full_unstemmed A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
title_sort A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy
author_id_str_mv 3445603fcc2ff9d27b476a73b223a507
author_id_fullname_str_mv 3445603fcc2ff9d27b476a73b223a507_***_Soran, Birosca
author Soran, Birosca
format Journal article
container_title Materials Science and Engineering: A
container_volume 718
container_start_page 19
publishDate 2018
institution Swansea University
issn 09215093
doi_str_mv 10.1016/j.msea.2018.01.083
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description Up to date, IN713C Nickel-based superalloy has been continued to be the best alloy candidate for turbocharger wheel applications due to its adequate fatigue property and resistance to degradation under harsh operating environments. Throughout this study, three different batches of as-cast IN713C nickel based superalloys with different microstructures including columnar, equiaxed and transition microstructures were investigated. Strain control Low Cycle fatigue (LCF) tests were conducted for the three different microstructures, achieving fatigue life between 100 and runout at 100,000 cycles, depending on the testing parameters. The fracture mechanics and failure mechanism were correlated to the alloy's microstructure, texture and chemical composition under various LCF conditions using optical microscopy, SEM, EDX and EBSD. In the current study an exact correlation between alloy's microstructure/microtexture and LCF endurance is established. The results showed that equiaxed microstructure has a superior fatigue life than the transition microstructure by 10% and columnar microstructure by > 200% at a given temperature and strain rate. This large discrepancy was mainly due to the grain size differences between the studied microstructures. Here, it was evidenced that the grain size controls the dendrites length. It is also demonstrated that all microstructures exhibited a longer fatigue life at room temperature than at 650 °C, doubling or tripling the fatigue life of the tested IN713C. Furthermore, the high presence of precipitates between dendritic arms in all three microstructures was found to have great influence on crack propagation path. It was apparent that segregated carbides in between dendritic arms caused secondary crack initiation and crack path undulations during the LCF tests.
published_date 2018-01-01T18:58:00Z
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