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Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method

The main aim of this study is to simulate and investigate the gamma and gamma prime phases structure stability and behaviour of misfit dislocation-precipitate with additional of Ni3Ti (DO24) in Ni-based superalloys using MD at 10 K, 293 K and 1000 K. The Ni3Ti are homogeneously distributed through ?...

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Main Author: Goh, Kian Heng
Format: Thesis
Language:English
Published: 2013
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/39006/5/GohKianHengMFKM2013.pdf
http://eprints.utm.my/id/eprint/39006/
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spelling my.utm.390062017-06-22T02:09:22Z http://eprints.utm.my/id/eprint/39006/ Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method Goh, Kian Heng TJ Mechanical engineering and machinery The main aim of this study is to simulate and investigate the gamma and gamma prime phases structure stability and behaviour of misfit dislocation-precipitate with additional of Ni3Ti (DO24) in Ni-based superalloys using MD at 10 K, 293 K and 1000 K. The Ni3Ti are homogeneously distributed through ? phase and the percentages are varied from 0.22%, 0.5%, 0.89% and 2.11%. MD is capable to produce three dimensions modelling based on time evolution of a set of interacting atoms and integrating their equation of motion. The Embedded Atom Method (EAM) is used to calculate phase stability, point defect properties, surface energies and relaxation for Ni-Ti-Al system. The empirical embedding energy function, electron density function and interatomic pair potential function used by this method are obtained. The conclusion of this simulation shows that distribution of Ni3Ti is vital in determining the Ni-Ni3Al phase stability. The data of temperature, total energy, stress in x-axis, stress in y-axis, stress in z-axis and volume are plotted and snapshot of each percentage of Ni3Ti added is taken at different step. At higher temperature (1000 K), it is more favourable and stable condition for higher Ti concentration (9L 2.11%) because of lower energy level and more stable temperature condition. 2013-09 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/39006/5/GohKianHengMFKM2013.pdf Goh, Kian Heng (2013) Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method. Masters thesis, Universiti Teknologi Malaysia, Faculty of Mechanical Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Goh, Kian Heng
Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
description The main aim of this study is to simulate and investigate the gamma and gamma prime phases structure stability and behaviour of misfit dislocation-precipitate with additional of Ni3Ti (DO24) in Ni-based superalloys using MD at 10 K, 293 K and 1000 K. The Ni3Ti are homogeneously distributed through ? phase and the percentages are varied from 0.22%, 0.5%, 0.89% and 2.11%. MD is capable to produce three dimensions modelling based on time evolution of a set of interacting atoms and integrating their equation of motion. The Embedded Atom Method (EAM) is used to calculate phase stability, point defect properties, surface energies and relaxation for Ni-Ti-Al system. The empirical embedding energy function, electron density function and interatomic pair potential function used by this method are obtained. The conclusion of this simulation shows that distribution of Ni3Ti is vital in determining the Ni-Ni3Al phase stability. The data of temperature, total energy, stress in x-axis, stress in y-axis, stress in z-axis and volume are plotted and snapshot of each percentage of Ni3Ti added is taken at different step. At higher temperature (1000 K), it is more favourable and stable condition for higher Ti concentration (9L 2.11%) because of lower energy level and more stable temperature condition.
format Thesis
author Goh, Kian Heng
author_facet Goh, Kian Heng
author_sort Goh, Kian Heng
title Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
title_short Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
title_full Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
title_fullStr Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
title_full_unstemmed Effects of Ni3Ti (DO24) Precipitates and composition on Ni-based superalloys using molecular dynamics method
title_sort effects of ni3ti (do24) precipitates and composition on ni-based superalloys using molecular dynamics method
publishDate 2013
url http://eprints.utm.my/id/eprint/39006/5/GohKianHengMFKM2013.pdf
http://eprints.utm.my/id/eprint/39006/
_version_ 1643650293734309888
score 13.211869

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