M2i2 Publication Library

M2i2 Research Publications on Advanced Engineering

Browse M2i2's latest publications in engineering research, focusing on additive manufacturing, material behaviour, and cutting-edge computational modelling techniques.

M2i2 Publication Library

Discover M2i2’s pioneering research in additive manufacturing, material behaviour, and advanced computational modelling techniques for engineering innovation.

Voxel-Based Full-Field Eigenstrain Reconstruction of Residual Stresses in Additive Manufacturing Parts Using Height Digital Image Correlation

Residual stresses are an unavoidable consequence of additive manufacturing (AM) of metallic parts due to the inherent thermo-mechanical effects. The unpredictable nature of these processes makes it difficult to fully understand the magnitude and distribution of these stresses. This study addresses the challenge by utilising a voxel-based eigenstrain reconstruction method.

Microstructural, Mechanical and In-Situ Evaluations of Electron Beam Welded Ti-6al-4v Alloy after Post-Weld Heat Treatments

This study investigates the effects of post-weld heat treatments on the microstructure and mechanical properties of electron beam welded Ti-6Al-4V alloy, revealing that different treatments alter failure locations, tensile strength, and elongation-to-failure. Thermodynamic modelling was used to predict the yield strengths for varying grain sizes, which were incorporated into a finite element model to simulate tensile behaviour under stress and strain conditions before failure.

Automated Stereology and Uncertainty Quantification Considering Spherical Non-Penetrating Dispersions

This study introduces automated stereological methods for estimating the 3D size distribution of unimodal and bimodal precipitate dispersions from 2D and 1D measurements, along with a method to quantify the uncertainty based on sample size. Two procedures are described for estimating size distributions in bimodal populations, allowing for volume fraction estimation if micrographs have consistent magnification, or area fraction estimation if taken at different magnifications, providing a foundation for accurate characterisation in modelling.

Modelling and Predictions of Time-Dependent Local Stress Distributions Around Cracks Under Dwell Loading in a Nickel-Based Superalloy at High Temperatures

Finite element modelling was used to explore the impact of time-dependent deformation on dwell fatigue crack growth in turbine disc alloys, particularly examining how crack growth rates and retardation vary during dwell and overload-dwell cycles. The study highlighted that local crack-tip stress relaxation and overload factors significantly influence crack growth behaviour, with predictions showing that extended overload periods lead to stronger retardation effects.

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