The possibility of producing bainite at low temperatures by suppressing transformation using substitutional solutes has been investigated, as an alternative to using large carbon concentrations to achieve the same purpose. It is found that although transformation temperatures can indeed be suppressed in this way, the difference between the bainite and martensite start temperatures diminishes. T...

The aim of this work is to provide a novel understanding pseudoelasticity mechanisms in an FeMnSi-based shape memory alloy and utilize the identified parameters control enhance mechanical behavior alloy. was processed by employing caliber rolling equivalent strain 0.25 at room temperature. Various heat treatments from 530 1000 °C were applied study microstructural evolution during short-term po...

For the mechanical behavior of steels with metastable austenite, it was widely accepted that high strain rates could weaken deformation-induced martensitic transformation (DIMT) and reduce work-hardening behavior. This limits application these for energy-absorption applications, e.g., impact conditions. However, mechanism strain-rate dependent DIMT is still not well understood greatly limited f...

The microstructure of a Co38Ni33Al29 FSMA was determined by conventional transmission electron microscopy, electron diffraction studies together with advanced microscopy techniques and in-situ Lorentz microscopy. 10 to 60 nm sized rod-like precipitates of hcp ǫ-Co were confirmed to be present by HRTEM. The orientation relationship between the precipitates and B2 matrix is described by the Burge...

The processing of advanced multiphase high strength steels often includes isothermal treatments around the martensite start temperature (Ms) for achieving a refined microstructure comprising bainite-austenite and/or bainite-martensite-austenite phase constituents. objective this research work was to investigate structure-property relationship medium carbon, high-silicon DIN 1.5025 steel (Fe-0.5...

A dual-phase steel chemistry has been processed with varying intercritical annealing temperatures and the properties investigated. It was found that increasing temperature in region led to an increase volume fraction (52%–65%) grain size (1.8–3.3 µm) of martensite whilst ferrite decreased. The highest tensile strengths were at low temperatures, achieving 935 MPa elongation values 21% achieved t...