The influence of martensite-austenite constituents on the two-step ductile to brittle transition (DBT) behavior low carbon steel sheets was evaluated using Charpy impact tests with sub-size specimens. Four kinds containing 0–38% volume fraction MA and polygonal ferrite in matrix were chosen. Small volumes (i.e., 2 14%) revealed a slightly higher temperature between middle shelf (MS) lower shelf...

During laser-based powder bed fusion, the non-equilibrium solidification conditions promote local elemental segregation, leading to a characteristic microstructure composed of cellular walls. These walls can display either low carbon BCC martensite or FCC retained austenite crystal structures, thus affecting subsequent isochronal isothermal phase transformation mechanisms. In present study, eff...

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...

The present study utilizes molecular dynamics simulations to the athermal and stress-induced martensitic transformation of B2 B19' phase in a Ni-Ti alloy effect precipitates on transformation. demonstrate existence an intermediate B19 between martensite austenite phases. Nickel-Titanium shape memory with is studied by introducing Ni3Ti, NiTi2 Ni4Ti3 individually using atomistic simulations. res...

Abstract. High-Mn steels have great plasticity when subjected to deformation due TWIP or TRIP effects. This work evaluated the microstructural evolution, formation of -Martensite phase taking into account hot rolling 80-60% and solution annealing. Afterwards, microstructures were analyzed by SEM. Volume fraction Austenite phases measured EBSD technique. The steel obtained low energy levels sta...

The combined effect of the cooling rate and microalloying has been studied from suction casted Cu50Zr50, Cu49.5Zr50Fe0.5 Cu49Zr50Fe1 at. % rods 2 mm 4 diameter. For samples, ∼1000 K/s rate, microstructure mostly consists B2 CuZr austenite it is basically same for all compositions. However, 0.5 Fe addition promotes formation stress-induced B19’ martensite upon wear testing thus improving resista...

This study aims to systematically investigate the influence of boron (0–3.0 wt % B) on microstructure and abrasive wear characteristics high chromium based multi-component white cast iron (Hi-Cr MWCI). As result, is mainly composed martensite matrix carborides such as M7(C, B)3, M2(C, B), M23(C, B)6. At low load, B can increase resistance Hi-Cr MWCI owing higher volume fraction B). However, it ...

Transformation-induced plasticity (TRIP) is a phenomenon that improves the deformability of high-strength steel. TRIP depends on deformation-induced martensite transformation behavior. To clarify mechanism in low-alloy steel, we evaluated behavior via in-plane tension and compression experiments. During tensile compressive deformation, volume fraction austenite (Vγ) decreased as strain stress i...