The quantitative relationship between non-linear stress-strain behaviour and dislocation structure in martensitic stainless steel

The reversible behaviour of metals at low applied stresses is more complex than the generally assumed linear behaviour. This primarily because nature dislocation motion leading to a strain contribution known as anelasticity. work aims investigate (a) quantification structures in industrial grade stainless steels, (b) unloading behaviour, and (c) fundamentals mechanical occurring below yield stress. Mechanical testing martensitic steel (Stavax ESR) was performed two different modes: incremental plastic deformation cyclic loading-unloading stress with focus on measurement small strains corresponding stresses, pre-yield regime. non-linear quantitatively analysed, opposed common approximation an empirical determination apparent Young's modulus. recently proposed model has been refined and, for first time, successfully microstructure such steel. structure parameters shown be efficient alternative conventional experimental methods quantifying structure. Further, unique representation hysteresis provides insight into material Lastly, little studied microplasticity upon determined. Importantly, physical basis will allow deformations region, large enough significant processes.