Lath martensite reveals a specific hierarchical subgrain structure, with laths, blocks and packets of particular crystallography. The presence of interlath retained austenite layers has been reported in the literature. This paper investigates the potential influence of the interlath retained austenite on the mechanical behaviour of lath martensite subgrains. To this purpose, a martensite grain ...

The martensite steels produced by quenching and tempering has been used for machine structural use. Martensite in ferrite-martensite dual-phase steels (hereinafter, DP steels) also has important roll in strengthening of the automobile steel sheets. Therefore the importance of analyzing the microstructure and their mechanical properties of the martensite has been increased year by year. Many res...

Abstract Lath martensite substructures in as-quenched plain carbon steels exhibit dislocation-like contrast the transmission electron microscope. More recent observations reported internal twins and nanoscale auto-tempered intra-lath carbides as additional lath ultra-low-C binary Fe–C steels. Modern microalloyed often have similar ultra-low C contents besides microalloying elements like Ti, Nb ...

Two mechanisms inconsistent each other, a relaxation of type II internal stress and presence mobile dislocation, were previously proposed to describe the low elastic limit as-quenched lath martensite steels. In this study, neutron diffraction experiments performed revisit deformation behavior steel. Dislocations with very dense in order 1015 m−2 observed single phase condition Fe–18Ni alloy. Th...

The austenite-to-martensite transformation in a partially hardened stainless steel containing 17wt %Cr, 7wt %Ni and 1wt % Al was investigated with Vibrating Sample Magnetometry and Electron Back-Scatter Diffraction. Magnetometry demonstrated that measurable martensite formation can be suppressed on fast cooling to 77K as well as on subsequent fast heating to 373 K. Surprisingly, martensite form...