A hierarchical multiscale modelling approach to prediction of the high temperature behaviour of nickel-based superalloys

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• Dr Hector Basoalto, School of Metallurgy & Materials, University of Birmingham
• Wednesday 28 February 2018, 14:00-15:00
• Metallurgy and Materials, GC13.

If you have a question about this talk, please contact Andrew Morris.

Tea/coffee and biscuits at 1.30pm in the C block foyer All are welcome to attend

The creep, fatigue and crack growth behaviour of engineering alloys such as nickel-based superalloys are determined by the activation and interaction of a number of mechanisms, which are defined over a number of length scales. These include interactions between dislocations as well as dislocations with structures such as precipitates and grain boundaries. The problem is further complicated by the fact that microstructures are not stable at high temperatures and will evolve in a non-linear manner. Such interactions result in heterogeneous deformation at the grain level which can further influence the macroscale response of the material.

A hierarchical multiscale materials modelling framework is presented. The approach is part of an integrated computational materials effort to establish causal links between microstructure and properties in two-phase engineering alloy systems. It will be shown that macroscale properties of two-phase alloys are an emergent phenomena arising from the fundamental dislocation-microstructure interactions. The approach will be demonstrated to predict the flow stress, creep and dwell fatigue crack growth behaviour of high volume fraction gamma’ alloys.

This talk is part of the School of Metallurgy and Materials Colloquia series.

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• Metallurgy and Materials, GC13

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