Oxidation Damage at a Crack Tip and Its Significance in Crack Growth under Fatigue-Oxidation Conditions
Lead Research Organisation:
University of Southampton
Department Name: Faculty of Engineering & the Environment
Abstract
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Organisations
- University of Southampton (Lead Research Organisation)
- Uniper SE (Collaboration)
- Defence Science & Technology Laboratory (DSTL) (Collaboration)
- National Aeronautics and Space Administration (NASA) (Collaboration)
- Alstom (Collaboration)
- University of Warwick (Collaboration)
- Rolls Royce Group Plc (Collaboration)
- University of Rwanda (Collaboration)
People |
ORCID iD |
| Philippa Reed (Principal Investigator) |
Publications
Evangelou A
(2018)
Oxidation behaviour of single crystal nickel-based superalloys: intermediate temperature effects at 450-550°C
in Materials Science and Technology
Farukh F
(2016)
Realistic microstructure-based modelling of cyclic deformation and crack growth using crystal plasticity
in Computational Materials Science
Farukh F
(2015)
Fatigue crack growth in a nickel-based superalloy at elevated temperature - experimental studies, viscoplasticity modelling and XFEM predictions
in Mechanics of Advanced Materials and Modern Processes
Jiang R
(2016)
Critical Assessment 21: oxygen-assisted fatigue crack propagation in turbine disc superalloys
in Materials Science and Technology
Jiang R
(2015)
Influence of oxidation on fatigue crack initiation and propagation in turbine disc alloy N18
in International Journal of Fatigue
Jiang R
(2017)
Effects of oxygen-related damage on dwell-fatigue crack propagation in a P/M Ni-based superalloy: From 2D to 3D assessment
in International Journal of Fatigue
Jiang R
(2020)
Fatigue crack growth mechanisms in powder metallurgy Ni-based superalloys-A review
in International Journal of Fatigue
Jiang R
(2015)
Influence of orientation-dependent grain boundary oxidation on fatigue cracking behaviour in an advanced Ni-based superalloy
in Journal of Materials Science
Jiang R
(2018)
Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?
in Corrosion Science
| Description | Fatigue crack propagation in high temperature turbine blades and discs is a result of competing effects of oxygen-related damage and mechanical damage.The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation. Identifying these mechanisms will allow better prediction of aeroengine and power generation service lifetimes, allowing improved safety but also more efficient turbine use |
| Exploitation Route | Identifying these mechanisms will allow better prediction of aeroengine and power generation service lifetimes, allowing improved safety but also more efficient turbine use, this data has been used by our collaborators in developing their modelling work |
| Sectors | Aerospace, Defence and Marine,Energy,Manufacturing, including Industrial Biotechology,Transport |
| Description | The data and models generated were disseminated through our industrial collaborators including E.On, Alstom, NASA and Dstl. The results have also been identified by other industries as of key interest to immediate service issues (e.g. Rolls Royce) who are striving to achieve maximum service life and temperature capabilities of critical high-temperature components. Researchers and academics working on high-temperature materials and related areas have directly collaborated with us using our samples generated in this project (e.g. Virginia Tech) and also visited us for further discussions and ongoing collaborations kicked off by this work. |
| First Year Of Impact | 2021 |
| Sector | Aerospace, Defence and Marine |
| Impact Types | Economic |
| Description | Fundamental investigation of crack initation and propagation prcesses in DS turbine blade materials at intermediate temperatures |
| Amount | £60,000 (GBP) |
| Organisation | Chinese Scholarship Council |
| Sector | Charity/Non Profit |
| Country | China |
| Start | 10/2019 |
| End | 09/2023 |
| Description | Oxidation fatigue propagation processes at intermediate temperatures in single crystal turbine blades |
| Amount | £144,862 (GBP) |
| Organisation | Rolls Royce Group Plc |
| Sector | Private |
| Country | United Kingdom |
| Start | 10/2021 |
| End | 09/2025 |
| Description | Alstom power |
| Organisation | Alstom |
| Department | Alstom UK |
| Country | United Kingdom |
| Sector | Private |
| PI Contribution | Experimental and computational study of fatigue-oxidation damage and crack growth in single crystal and directionally solidified turbine blade superalloys for gas turbines in power generation applications. |
| Collaborator Contribution | Supply of materials and technical advice; attendance at project review meetings. |
| Impact | Conference and journal publications |
| Start Year | 2013 |
| Description | E.ON |
| Organisation | Uniper SE |
| Country | Germany |
| Sector | Private |
| PI Contribution | Provide a fundamental understanding of fatigue-oxidation damage mechanism for gas turbine blades and discs |
| Collaborator Contribution | Supply of technical advice and attendance at project review meetings. Support of accompanying CASE award student |
| Impact | Journal and conference publications |
| Start Year | 2010 |
| Description | NASA |
| Organisation | National Aeronautics and Space Administration (NASA) |
| Country | United States |
| Sector | Public |
| PI Contribution | Experimental and computational study of critical fatigue-oxidation damage processes of NASA superalloy LSHR for application in gas turbines. |
| Collaborator Contribution | Supply of materials and technical advice. |
| Impact | Journal and conference publications. |
| Start Year | 2010 |
| Description | Rolls Royce |
| Organisation | Rolls Royce Group Plc |
| Country | United Kingdom |
| Sector | Private |
| PI Contribution | We are providing information on crack growth behaviour on alloys of interest to Rolls Royce, this has recently extended to looking at effects of shot peening on fatigue life predictions as well as crack growth behaviour in different alloys at high and low temperature. They are also now sponsoring a new PhD project (ICASE) Started October 2021 |
| Collaborator Contribution | Rolls Royce have provided alloys for us to test and attend technical review meetings to discuss our results, they have also now awarded us an ICASE to studt turbine blade failure problems (2021-2025) |
| Impact | joint publications, contribution to technical reviews, service failure investigations and advice |
| Start Year | 2014 |
| Description | Swansea |
| Organisation | University of Rwanda |
| Country | Rwanda |
| Sector | Academic/University |
| PI Contribution | We are working on fatigue testing at high temperatures - we provide crack propagation results |
| Collaborator Contribution | Swansea have great expertise on strain controlled testing, something we cannot contribute |
| Impact | joint publications are planned |
| Start Year | 2014 |
| Description | Warwick |
| Organisation | University of Warwick |
| Department | Department of Physics |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Collaboration on an EPSRC programme that has now finished, but we have tested samples from other programmes that are of mutual interest that led to joint publications and Warwick allowed us access to advanced characterisation facilities and input from their staff |
| Collaborator Contribution | Collaboration on an EPSRC programme that has now finished, but we have tested samples from other programmes that are of mutual interest that led to joint publications and Warwick allowed us access to advanced characterisation facilities and input from their staff |
| Impact | Joint publications listed |
| Start Year | 2015 |
| Description | dstl |
| Organisation | Defence Science & Technology Laboratory (DSTL) |
| Country | United Kingdom |
| Sector | Public |
| PI Contribution | Provide guidance for life assessment of gas turbines |
| Collaborator Contribution | Providing technical advice and attending project review meetings. |
| Impact | Journal and conference publications |
| Start Year | 2013 |
| Description | Big Bang Solent event |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Schools |
| Results and Impact | developing engineering displays around nickel base superalloys and their use in turbine applications this was mostly focussed on local Southampton schools and families |
| Year(s) Of Engagement Activity | 2014 |
| Description | Cheltenham Science Festival |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | Yes |
| Geographic Reach | National |
| Primary Audience | Public/other audiences |
| Results and Impact | We were part of the University of Southampton exhibition at this major science festival Developing and expanding our show to communicate more effectively about the fundamentals of materials science in turbine applications |
| Year(s) Of Engagement Activity | 2014 |
| Description | Presentation at the Thomas Hardye School, Dorchester |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Schools |
| Results and Impact | presentation at school based fair general raising of awareness of materials applications in turbine materials |
| Year(s) Of Engagement Activity | 2013 |
| Description | Science and Engineering Day, UOS |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | We ran a stand at our University's award winning Science and Engineering Day on 22nd March 2014, a large number of people from the local region attended. We ran it again in March 2015 increased visibility of materials science applied to turbine systems for the general public |
| Year(s) Of Engagement Activity | 2014,2015 |
| Description | Tomorrow's World (Science Tent), Bestival, Isle of Wight |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | Yes |
| Geographic Reach | National |
| Primary Audience | Public/other audiences |
| Results and Impact | Part of the University of Southampton roadshow activity good attendance and lots of discussion with a range of school age children |
| Year(s) Of Engagement Activity | 2014,2015 |
| URL | http://www.campbestival.net/line-up/2014-line-up/science-tent/ |
| Description | Winchester Science Festival |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | Yes |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | part of the University of Southampton exhibition general public outreach about materials in turbine applications |
| Year(s) Of Engagement Activity | 2014,2015 |
| URL | http://winchesterscifest.org/ |