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Creep deformation mechanisms in a γ titanium aluminide

Zak Abdallah, Rengen Ding, Nigel Martin, Mark Dixon, Martin Bache

Materials Science and Engineering: A, Volume: 673, Pages: 616 - 623

Swansea University Authors: Zak Abdallah, Martin Bache

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DOI (Published version): 10.1016/j.msea.2016.07.109

Abstract

Titanium aluminides (TiAl) are considered as potential alternatives to replace nickel-based alloys of greater density for selected components within future gas turbine aero-engines. This is attributed to the high specific strength as well as the good oxidation resistance at elevated temperatures. Th...

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Published in: Materials Science and Engineering: A
ISSN: 0921-5093
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa29379
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spelling 2020-07-17T15:53:08.1494578 v2 29379 2016-08-01 Creep deformation mechanisms in a γ titanium aluminide ae66331ad6f4d38f8799b9b5375770dd Zak Abdallah Zak Abdallah true false 3453423659f6bcfddcd0a716c6b0e36a Martin Bache Martin Bache true false 2016-08-01 MTLS Titanium aluminides (TiAl) are considered as potential alternatives to replace nickel-based alloys of greater density for selected components within future gas turbine aero-engines. This is attributed to the high specific strength as well as the good oxidation resistance at elevated temperatures. The gamma (γ) titanium aluminide system Ti-45Al-2Mn-2Nb has previously demonstrated promising performance in terms of its physical and mechanical properties. The main aim of the current study, which is a continuation of a previously published paper, aims at evaluating the performance of this titanium aluminide system under high temperature creep conditions. Of particular interest, the paper is strongly demonstrating the precise capability of the Wilshire Equations technique in predicting the long-term creep behaviour of this alloy. Moreover, it presents a physically meaningful understanding of the various creep mechanisms expected under various testing conditions. To achieve this, two creep specimens, tested under distinctly different stress levels at 700 °C have been extensively examined. Detailed microstructural investigations and supporting transmission electron microscopy (TEM) have explored the differences in creep mechanisms active under the two stress regimes, with the deformation mechanisms correlated to Wilshire creep life prediction curves. Journal Article Materials Science and Engineering: A 673 616 623 0921-5093 31 12 2016 2016-12-31 10.1016/j.msea.2016.07.109 Erratum published at http://dx.doi.org/10.1016/j.msea.2016.09.051The publisher regrets that there has been a mistake made in the body of the text.On page 621, the sentence beginning with “The beam direction is close to…” should read “The beam direction is close to [1View the MathML source0]…” and NOT “[1–10]”. This is not a citation to references but a slip plane system in materials science.The publisher would like to apologise for any inconvenience caused. COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-07-17T15:53:08.1494578 2016-08-01T14:15:13.8649822 Zak Abdallah 1 Rengen Ding 2 Nigel Martin 3 Mark Dixon 4 Martin Bache 5 0029379-19102016140128.pdf abdallah2016(2)v2.pdf 2016-10-19T14:01:28.4170000 Output 137051 application/pdf Accepted Manuscript true 2017-07-27T00:00:00.0000000 Erratum published false 0029379-81201621530PM.pdf abdallah2016v2.pdf 2016-08-01T14:15:30.7900000 Output 1331463 application/pdf Accepted Manuscript true 2017-07-27T00:00:00.0000000 false
title Creep deformation mechanisms in a γ titanium aluminide
spellingShingle Creep deformation mechanisms in a γ titanium aluminide
Zak Abdallah
Martin Bache
title_short Creep deformation mechanisms in a γ titanium aluminide
title_full Creep deformation mechanisms in a γ titanium aluminide
title_fullStr Creep deformation mechanisms in a γ titanium aluminide
title_full_unstemmed Creep deformation mechanisms in a γ titanium aluminide
title_sort Creep deformation mechanisms in a γ titanium aluminide
author_id_str_mv ae66331ad6f4d38f8799b9b5375770dd
3453423659f6bcfddcd0a716c6b0e36a
author_id_fullname_str_mv ae66331ad6f4d38f8799b9b5375770dd_***_Zak Abdallah
3453423659f6bcfddcd0a716c6b0e36a_***_Martin Bache
author Zak Abdallah
Martin Bache
author2 Zak Abdallah
Rengen Ding
Nigel Martin
Mark Dixon
Martin Bache
format Journal article
container_title Materials Science and Engineering: A
container_volume 673
container_start_page 616
publishDate 2016
institution Swansea University
issn 0921-5093
doi_str_mv 10.1016/j.msea.2016.07.109
document_store_str 1
active_str 0
description Titanium aluminides (TiAl) are considered as potential alternatives to replace nickel-based alloys of greater density for selected components within future gas turbine aero-engines. This is attributed to the high specific strength as well as the good oxidation resistance at elevated temperatures. The gamma (γ) titanium aluminide system Ti-45Al-2Mn-2Nb has previously demonstrated promising performance in terms of its physical and mechanical properties. The main aim of the current study, which is a continuation of a previously published paper, aims at evaluating the performance of this titanium aluminide system under high temperature creep conditions. Of particular interest, the paper is strongly demonstrating the precise capability of the Wilshire Equations technique in predicting the long-term creep behaviour of this alloy. Moreover, it presents a physically meaningful understanding of the various creep mechanisms expected under various testing conditions. To achieve this, two creep specimens, tested under distinctly different stress levels at 700 °C have been extensively examined. Detailed microstructural investigations and supporting transmission electron microscopy (TEM) have explored the differences in creep mechanisms active under the two stress regimes, with the deformation mechanisms correlated to Wilshire creep life prediction curves.
published_date 2016-12-31T03:35:43Z
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score 11.037603

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