Misfit in Inconel-Type Superalloy
An important parameter for the characterization of microstructural changes in nickel base superalloys is the misfit - the relative difference between lattice parameters of γ matrix and γ′ precipitates. The misfit in IN738LC superalloy was examined at POLDI time-of-flight (TOF) neutron diffractometer...
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Online Access: | http://dx.doi.org/10.1155/2013/408347 |
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doaj-4426745282c14c7e9936792805f600562020-11-24T23:08:56ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/408347408347Misfit in Inconel-Type SuperalloyPavel Strunz0Martin Petrenec1Vadim Davydov2Jaroslav Polák3Přemysl Beran4Nuclear Physics Institute, ASCR, 25068 Řež, Czech RepublicInstitute of Physics of Materials, ASCR, Žižkova 22, 61662 Brno, Czech RepublicMaterials Science and Simulation, ASQ/NUM, PSI, 5232 Villigen, SwitzerlandInstitute of Physics of Materials, ASCR, Žižkova 22, 61662 Brno, Czech RepublicNuclear Physics Institute, ASCR, 25068 Řež, Czech RepublicAn important parameter for the characterization of microstructural changes in nickel base superalloys is the misfit - the relative difference between lattice parameters of γ matrix and γ′ precipitates. The misfit in IN738LC superalloy was examined at POLDI time-of-flight (TOF) neutron diffractometer both at room temperature and in situ at elevated temperatures using a high-temperature furnace. A careful out-of-furnace measurement yielded the lattice parameters of both γ and γ′ phase at room temperature (aγ=3.58611(10) Å, aγ′=3.58857(17) Å) as well as the misfit (equal to 6.9(6)×10-4). The in situ measurement at elevated temperatures provided the temperature dependence of the lattice parameters of γ (up to 1120°C) and γ′ (up to 1000°C). Using these data, the evolution of the misfit with temperature was calculated. The misfit decreases with increasing temperature until it reaches zero value at a temperature around 800°C. Above 800°C, it becomes negative.http://dx.doi.org/10.1155/2013/408347 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Pavel Strunz Martin Petrenec Vadim Davydov Jaroslav Polák Přemysl Beran |
spellingShingle |
Pavel Strunz Martin Petrenec Vadim Davydov Jaroslav Polák Přemysl Beran Misfit in Inconel-Type Superalloy Advances in Materials Science and Engineering |
author_facet |
Pavel Strunz Martin Petrenec Vadim Davydov Jaroslav Polák Přemysl Beran |
author_sort |
Pavel Strunz |
title |
Misfit in Inconel-Type Superalloy |
title_short |
Misfit in Inconel-Type Superalloy |
title_full |
Misfit in Inconel-Type Superalloy |
title_fullStr |
Misfit in Inconel-Type Superalloy |
title_full_unstemmed |
Misfit in Inconel-Type Superalloy |
title_sort |
misfit in inconel-type superalloy |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2013-01-01 |
description |
An important parameter for the characterization of microstructural changes in nickel base superalloys is the misfit - the relative difference between lattice parameters of γ matrix and γ′ precipitates. The misfit in IN738LC superalloy was examined at POLDI time-of-flight (TOF) neutron diffractometer both at room temperature and in situ at elevated temperatures using a high-temperature furnace. A careful out-of-furnace measurement yielded the lattice parameters of both γ and γ′ phase at room temperature (aγ=3.58611(10) Å, aγ′=3.58857(17) Å) as well as the misfit (equal to 6.9(6)×10-4). The in situ measurement at elevated temperatures provided the temperature dependence of the lattice parameters of γ (up to 1120°C) and γ′ (up to 1000°C). Using these data, the evolution of the misfit with temperature was calculated. The misfit decreases with increasing temperature until it reaches zero value at a temperature around 800°C. Above 800°C, it becomes negative. |
url |
http://dx.doi.org/10.1155/2013/408347 |
work_keys_str_mv |
AT pavelstrunz misfitininconeltypesuperalloy AT martinpetrenec misfitininconeltypesuperalloy AT vadimdavydov misfitininconeltypesuperalloy AT jaroslavpolak misfitininconeltypesuperalloy AT premyslberan misfitininconeltypesuperalloy |
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