| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rahimi, Salah
University of Strathclyde
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (44/44 displayed)
- 2023Evolution of microstructure in MLX®19 maraging steel during rotary friction welding and finite element modelling of the processcitations
- 2023Miniaturised experimental simulation of open-die forgingcitations
- 2023Finite element modelling of transient behaviours and microstructural evolution during dissimilar rotary friction welding of 316 austenitic stainless steel to A516 ferritic steelcitations
- 2023The evolution of abnormal grains during the heating stage of a post-weld solution treatment in a friction-stir-welded 2519 aluminium alloycitations
- 2023Determination of recrystallisation phenomenon in type 316 stainless steel VIM-VAR ingots during cogging operations
- 2023Residual stress distributions in dissimilar titanium alloy diffusion bonds produced from powder using field-assisted sintering technology (FAST-DB)citations
- 2022Continuous drive friction welding of AISI 8630 low-alloy steelcitations
- 2022Unravelling thermal-mechanical effects on microstructure evolution under superplastic forming conditions in a near alpha titanium alloycitations
- 2022An innovative constitutive material model for predicting high temperature flow behaviour of inconel 625 alloycitations
- 2022Digital twins for high-value components
- 2022Microstructure and mechanical properties of dissimilar inertia friction welded 316L stainless steel to A516 ferritic steel for potential applications in nuclear reactorscitations
- 2022An analysis of the forgeability of Ti-10V-2Fe-3Al β titanium alloy using a combined Estrin Mecking and Avrami material constitutive modelcitations
- 2021A novel cyclic thermal treatment for enhanced globularisation kinetics in Ti-6Al-4V alloycitations
- 2021Effect of texture and mechanical anisotropy on flow behaviour in Ti-6Al-4V alloy under superplastic forming conditionscitations
- 2021Inter-relationship between microstructure evolution and mechanical properties in inertia friction welded 8630 low-alloy steelcitations
- 2021Comparison between surface and near-surface residual stress measurement techniques using a standard four-point-bend specimencitations
- 2021Effect of deformation heating on microstructure evolution during hot forging of Ti-6Al-4Vcitations
- 2021On the evolution of microstructure and mechanical properties of type 316 austenitic stainless steel during ingot to billet conversion processcitations
- 2020A new method for predicting susceptibility of austenitic stainless steels to intergranular stress corrosion crackingcitations
- 2020Mechanical response and microstructure evolution of commercially pure titanium subjected to repetitive bending under tensioncitations
- 2019Effect of stress relaxation on the evolution of residual stress during heat treatment of Ti-6Al-4V
- 2019Evolution of microstructure and crystallographic texture during dissimilar friction stir welding of duplex stainless steel to low carbon-manganese structural steelcitations
- 2019Evolution of microstructure during double-sided friction stir welding of microalloyed steelcitations
- 2019In situ characterization of work hardening and springback in grade 2 α-titanium under tensile loadcitations
- 2018Evolution of microstructure and residual stress in hot rolled Ti-6Al-4V plates subjected to different heat treatment conditionscitations
- 2018Characterisation and modelling of in-plane springback in a commercially pure titanium (CP-Ti)citations
- 2018Effect of deformation-induced adiabatic heating on microstructure evolution during open-die screw press forging of Ti-6Al-4V.
- 2017Development of process induced residual stress during flow forming of tubular 15-5 martensitic stainless steel
- 2017Stress relaxation behaviour in IN718 nickel based superalloy during ageing heat treatmentscitations
- 2017Measurements of residual stress and microstructural evolution in electron beam welded Ti-6Al-4V using multiple techniquescitations
- 2017Development of microstructure and crystallographic texture in a double-sided friction stir welded microalloyed steelcitations
- 2017Effects of forming route and heat treatment on the distortion behaviour of case-hardened martensitic steel type S156
- 2017Microstructure and residual stress in Ti-6l-4V parts made by different additive manufacturing techniques
- 2016The determination of residual stress in extruded Ti-6Al-4V by contour method and finite element analysiscitations
- 2016Residual stress generations in brazed tungsten dissimilar jointscitations
- 2016Residual stress generation in tungsten-copper brazed joint using brazing alloycitations
- 2016Measurements of surface and near-surface residual stress in 4330 low alloy carbon steel weld clad componentscitations
- 2016Effect of plastic deformation on elastic and plastic recovery in CP-Titaniumcitations
- 2016Effect of surface machining on intergranular stress corrosion cracking (IGSCC) in sensitised type 304 austenitic stainless steelcitations
- 2016Microstructure and residual stress in Ti-6l-4V parts made by different additive manufacturing techniques
- 2012Effects of orientation, stress and exposure time on short intergranular stress corrosion crack behaviour in sensitised type 304 austenitic stainless steelcitations
- 2010Behaviour of Short Intergranular Stress Corrosion Crack in Type 304 Austenitic Stainless Steel
- 2010Characterisation of the sensitisation behaviour of thermo-mechanically processed type 304 austenitic stainless steel using DL-EPR testing and image analysis methods
- 2008Influence of microstructure and stress on short intergranular stress corrosion crack growth in austenitic stainless steel type 304
Places of action
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article
Stress relaxation behaviour in IN718 nickel based superalloy during ageing heat treatments
Abstract
Designing microstructure of components made from Inconel 718 nickel based superalloy (IN718) with tailored mechanical properties for high temperature applications, require sequential thermo-mechanical processing. This often includes straining and annealing at solution annealing temperature (i.e. ≈980℃) followed by water quenching and subsequent aging heat treatments at lower temperatures. In addition to the microstructure development (i.e. precipitation) the aging heat treatment partially relieve the residual stresses generated at previous stages of forging and water quenching, however the stress field will not be completely relaxed. In this study, a series of experiments were conducted on round tensile specimens made from IN718 bar to investigate tensile stress relaxation behaviours at elevated temperatures used for aging heat treatments. The stress relaxation curves obtained can be described by a hyperbolic function with a non-zero asymptotic stress (σ∞), which seems to be proportional to the initially applied stress (σ0) for a fixed temperature. This behaviour is investigated at temperatures between 620℃ and 770℃ that is a temperature range used in industry to perform the aging heat treatments to obtain microstructures with tailored mechanical properties. It has been shown that the σ∞/ σ0 ratio has decreased rapidly with increasing temperature at this range. The relaxation behaviour has been assessed numerically and an empirical relationship has been defined for each temperature that can be used for modelling purposes.