In-situ characterization of grain nucleation and coarsening in metallic microstructures using synchrotron radiation

The research described in this thesis encompasses fields of 3DXRD, phase transformations and grain coarsening in iron alloys.

Control of surface graded transformation textures in steels for magnetic flux carrying applications

The magnetic anisotropy of ferromagnetic materials implies the consequence that the crystallographic texture of these materials needs to be controlled during processing in order to guarantee optimum magnetic properties. The equilibrium phase transformation between the high temperature austenite phase and the low temperature ferrite, is...

Nucleation of ferrite in austenite: The role of crystallography

The nucleation mechanisms during solid-state phase transformations in polycrystalline materials are still not completely understood. The nucleation stage has a strong influence on the overall evolution of phase transformations, which determines the final microstructure and thereby the properties of the material. The understanding of grain...

Microstructural Development during Welding of TRIP steels

The Advanced High Strength Steels (AHSS) are promising solutions for the production of lighter automobiles which reduce fuel consumption and increase passenger safety by improving crash-worthiness. Transformation Induced Plasticity Steel (TRIP) are part of the advanced high strength steels which offers a high strength and toughness combination...