![]() Despite the fact that steels are amongst the most extensively investigated materials, many features of the austenite-martensite transformation process during deformation remain unclarified to date. The numbers (700, 800) designate the ultimate tensile strength of the materials. For the purpose of understanding the structure-property relationships, two TRIP steels (Al alloyed TRIP 700 and Si alloyed TRIP 800) and one TRIP assisted Multi Phase or TAMP (Nb microalloyed TAMP 800) steel were investigated in this study. In Chapter 2 the material properties and material processing are described into more detail, and an overview is presented of the characterization techniques used in this thesis. Chapter 1 introduces the current state of the art of TRIP steels, highlighting the importance of microstructure - mechanical properties - applications relationships. In particular, the mechanical response of Transformation Induced Plasticity (TRIP) steels is correlated with their microstructures. The goal of the study consolidated in this thesis is to understand the mechanics in steels using microscopy.
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