Contact Dr Simon Gray
- Tel: +44 (0) 1234 754150
- Email: s.gray@cranfield.ac.uk
- ORCID
Areas of expertise
- Hydrogen
- Aerospace Materials
- Power Systems & Turbines
- Surface Engineering
- Sustainable Manufacturing
- Through-life Engineering Services
Current activities
Simon Gray, Principal Fellow, is responsible for running the Materials Perfomance in Extreme Environments facility in the Surface Engineering and Precision Centre at Cranfield University.
Current activities include:
High-temperature corrosion fatigue (both high cycle and low cycle) looking at performance and development of alloys and coating systems for the gas turbine industry. A major output is to provide data and develop lifing models for critical components. New hydrogen testing capaility.
Materials performance in hydrogen - tensile, fatigue, c-ring, permeation
Accelerated oxidation of alloys and coating systems to rapidly rank materials for use in gas turbines. A cheaper and more selective equivalent to a burner rig.
Machine Learning for NDE evaluation of corrosion damage
Stress corrosion cracking at elevate temperatures
Sustainable manufacturing
High-temperature corrosion of alloys and coatings
Assessing cyclic oxidation performance of new alloys
Oxidation and phase studies of intermetallics
Clients
- Rolls-Royce Holdings PLC
- Siemens Energy AG
- MTU Aero Engines AG
- ITP Aero (Rolls-Royce Holdings PLC)
- NASA
- Cannon-Muskegon
- UK Atomic Energy Authority
- Solar Turbines (A Caterpillar Company)
Publications
Articles In Journals
- Elsherkisi M, Duarte Martinez F, Mason-Flucke J, Gray S & Castelluccio GM. (2024). Interaction of stress corrosion cracks in single crystals Ni-Base superalloys. Engineering Fracture Mechanics, 298
- Bale H, Pelligra C, Mosayebi M, Casagrande T, Bassim N, .... (2024). Investigation of Stress Corrosion Cracking in CMSX-4 Turbine Blade Alloys Using Deep Learning Assisted X-ray Microscopy and Correlative Imaging Workflow. Microscopy and Microanalysis, 30(Supplement_1)
- Martinez FD, Dawson K, Tatlock G, Leggett J, Gibson G, .... (2024). Chlorine-Induced Stress Corrosion Cracking of Single Crystal Superalloys at 550 °C. High Temperature Corrosion of Materials, 101(5)
- Gray S, Mphahlele M, Collins DM, Jackson C, Hardy MC, .... (2024). Comparison of Performance of NiCr2O4 and Cr2O3 Formed on the Ni-Based Superalloy RR1000 Under Corrosive Conditions. High Temperature Corrosion of Materials, 101(5)
- Hakeem AH, Morar NI, Dawson K, Tatlock GJ, Gibson GJ, .... (2024). Effects of surface hardening by laser shock peening and shot peening on a nickel-based single-crystal superalloy CMSX-4. Materials Research Express, 11(7)
- Luo W, Syed AU, Nicholls JR & Gray S. (2023). An SVM-Based Health Classifier for Offline Li-Ion Batteries by Using EIS Technology. Journal of The Electrochemical Society, 170(3)
- Salignon M, Gray S, Rose T & Encinas-Oropesa A. (2023). A New Preparation Method for 3D Bio-composite Filament Manufacturing: a Study on the Effects of Ball Milling on the Cohesion/Adhesion of an Agave tequilana Bagasse/PLA Pellet Mixture. Circular Economy and Sustainability, 3(3)
- Dawson K, Duarte-Martinez F, Gray S, Nicholls J, Gibson G, .... (2023). Environmentally assisted cracking of a single crystal nickel-based superalloy. Materials at High Temperatures, 40(4)
- Waeytens M, Syed AU, Roberts T, Martinez FD, Gray S, .... (2023). A microscopy study of nickel-based superalloys performance in type I hot corrosion conditions. Materials at High Temperatures, 40(4)
- Duarte Martinez F, Syed A, Dawson K, Tatlock GJ, Morar NI, .... (2023). Effect of NaCl and SO 2 on the stress corrosion cracking of CMSX-4 at 550°C. Materials at High Temperatures, 40(4)
- Yu J, Hieu T, Gray S & Encinas-Oropesa A. (2023). A bi-objective decision support tool based on system dynamics and discrete event modelling for sustainable supply chain. Circular Economy, 1(3)
- Chapman N, Gray S, Sumner J & Nicholls J. (2022). Mechanical Stress Effects on 550 °C Hot Corrosion Propagation Rates in Precipitation Hardened Ni-Base Superalloys: CMSX-4, CM247LC DS and IN6203DS. Oxidation of Metals, 97(3-4)
- Lee H, Gray S, Zhao Y & Castelluccio GM. (2022). Machine Learning Applied to Identify Corrosive Environmental Conditions. Frontiers in Materials, 9
- Bale H, Kothari M, Holwell A, Phaneuf M, Gray S, .... (2022). Investigation of Stress Corrosion Cracking in CMSX-4 Turbine Blade Alloys Using Deep Learning Assisted X-ray Microscopy. Microscopy and Microanalysis, 28(S1)
- Luo W, Syed A, Gray S & Nicholls J. (2022). An SVM-Based Health Classifier for Offline Li-Ion Batteries by Using EIS Technology. ECS Meeting Abstracts, MA2022-02(28)
- Syed AU, Martinez FD, Roberts T, Encinas-Oropesa A, Morar NI, .... (2021). Performance Comparison Between Isothermal Hot Corrosion And In Situ Cyclic Hot Corrosion of Nickel-Based Superalloys. Oxidation of Metals, 96(1-2)
- Mobbs R-L, Ramsay JD, Reynolds TD, Gray S, Osgerby S, .... (2021). Simultaneous thermographic and optical recording media examination of the first oxide spallation event from the surface of an austenitic stainless steel. Corrosion Science, 179
- Chapman N, Gray S, Sumner J & Nicholls J. (2021). Stress Corrosion Testing of CMSX-4, CM247LC DS and IN6203DS Ni-Base Superalloys. Oxidation of Metals, 95(1-2)
- Chapman N, Gray S, Sumner J & Nicholls J. (2020). Surface Roughness Evolution to Identify Incubation Time for Hot Corrosion of Nickel-Base Superalloys: CMSX-4, CM247LC DS and IN6203DS at 550 °C. Oxidation of Metals, 94(5-6)
- Brooking L, Gray S, Dawson K, Nicholls JR, Simms NJ, .... (2020). Analysis of combined static load and low temperature hot corrosion induced cracking in CMSX-4 at 550°C. Corrosion Science, 163
- Smialek J & Gray S. (2018). Low Temperature Hot Corrosion Screening of Single Crystal Superalloys. Materials, 11(11)
- Brooking L, Gray S, Sumner J, Nicholls JR & Simms NJ. (2018). Interaction of hot corrosion fatigue and load dwell periods on a nickel-base single crystal superalloy. International Journal of Fatigue, 117
- Brooking L, Gray S, Sumner J, Nicholls JR, Marchant G, .... (2018). Effect of stress state and simultaneous hot corrosion on the crack propagation and fatigue life of single crystal superalloy CMSX-4. International Journal of Fatigue, 116
- Smialek JL & Gray S. (2018). Type II Hot Corrosion Screening Tests of a Cr2AlC MAX Phase Compound. Oxidation of Metals, 90(5-6)
- Morar NI, Roy R, Mehnen J, Marithumu S, Gray S, .... (2018). Investigation of recast and crack formation in laser trepanning drilling of CMSX-4 angled holes. The International Journal of Advanced Manufacturing Technology, 95(9-12)
- Brooking L, Sumner J, Gray S & Simms NJ. (2018). Stress corrosion of Ni-based superalloys. Materials at High Temperatures, 35(1-3)
- Chapman N, Brooking L, Sumner J, Gray S & Nicholls J. (2018). Corrosion fatigue testing: the combined effect of stress and high temperature corrosion. Materials at High Temperatures, 35(1-3)
- Cockings HL, Perkins K & Gray S. (2018). Optimisation of a salt deposition technique for the corrosion-fatigue testing of nickel based superalloys. Materials at High Temperatures, 35(5)
- Morar N, Roy R, Mehnen J, Nicholls JR & Gray S. (2017). The effect of trepanning speed of laser drilled acute angled cooling holes on the high temperature low cycle corrosion fatigue performance of CMSX-4 at 850 °C. International Journal of Fatigue, 102
- Gibson GJ, Perkins KM, Gray S & Leggett AJ. (2016). Influence of shot peening on high-temperature corrosion and corrosion-fatigue of nickel based superalloy 720Li. Materials at High Temperatures, 33(3)
- Haight H, Potter A, Sumner J & Gray S. (2015). New Technique to Map Hot Corrosion Damage: CMSX-4 Example. Oxidation of Metals, 84(5-6)
- Brewster G, Edmonds IM & Gray S. (2014). The Effect of Volatilisation of Refractory Metal Oxides on the Cyclic Oxidation of Ni-base Superalloys. Oxidation of Metals, 81(3-4)
- Foss BJ, Gray S, Hardy MC, Stekovic S, McPhail DS, .... (2013). Analysis of shot-peening and residual stress relaxation in the nickel-based superalloy RR1000. Acta Materialia, 61(7)
- Taylor MP, Evans HE, Gray S & Nicholls JR. (2011). A chromia forming thermal barrier coating system. Materials and Corrosion, 62(7)
- Gray S, Jacobs MH, Ponton CB, Voice W & Evans HE. (2004). A method of heat-treatment of near γ-TiAl to enhance oxidation resistance by the formation of a Ti5Si3 layer. Materials Science and Engineering: A, 384(1-2)
- GRAY S, JACOBS M, PONTON C, VOICE W & EVANS H. (2004). A method of heat-treatment of near γ-TiAl to enhance oxidation resistance by the formation of a Ti5Si3 layer. Materials Science and Engineering A, 384(1-2)
Conference Papers
- Duarte Martinez F, Morar NI, Kothari M, Gibson G, Leggett J, .... (2020). Investigation into the Effects of Salt Chemistry and SO2 on the Crack Initiation of CMSX-4 in Static Loading Conditions
- Brooking L, Ferguson C, Mason-Flucke J, Gibson G, Leggett J, .... (2020). Measurement and Evaluation of Co-existing Crack Propagation in Single-Crystal Superalloys in Hot Corrosion Fatigue Environments
- Morar NI, Roy R, Gray S, Nicholls J & Mehnen J. (2018). Modelling the influence of laser drilled recast layer thickness on the fatigue performance of CMSX-4
- Sumner J, Aksoul Q, Delgado J, Potter A & Gray S. (2017). Impact of Deposit Recoat Cycle Length on Hot Corrosion of CMSX-4
- Gray S, Berriche-Bouhanek K & Evans HE. (2004). Oxide Growth Stresses in an Austenitic Stainless Steel Determined by Creep Extension
- Gray S, Taylor MP, Chau E & Evans HE. (2003). Evaluation of the critical oxide thickness to initiate spallation from a LPPS CoNiCrAlY coating
