Johan Ahlström's research concerns the behaviour of engineering metals both during production and in service. Experimental characterization of the deformation behaviour and its relation to microstructure, temperature and strain rate combined with numerical modelling give possibilities for physical interpretation and prediction of the behaviour in a certain environment. Connected phenomena include phase transformations, fatigue, residual stresses and crack growth. Methods used encompass biaxial and thermo-mechanical mechanical testing, dilatometry, X-ray tomography, X-ray diffraction, microscopy and spectroscopy.
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