Data corresponding to the figures in the associated paper. Data is provided for samples of identical composition (Ti-24Nb-4Zr-8Sn wt%) solution treated at 900C for 30 min under vacuum, cooled at different rates. Data includes X-ray diffraction data (.xy files), DSC data (.txt files), EBSD data (.ctf files), ECCI micrographs (.tiff files) and mechan...
Published in International Journal of Materials Research
The fatigue behaviour of NiTi wire has been studied. It was found that NiTi wires trained with constant strain could show different fatigue behaviour, depending on the temperature range of training and the temperature range of fatigue. A mechanism for the thermal fatigue behaviour of NiTi is suggested according to the experimental results.
The realisation of sophisticated hierarchically patterned multiphase steels has the potential to enable unprecedented properties in engineering components. The present work explores the controlled creation of patterned multiphase steels in which the patterns are defined by two different crystal structures: face centre cubic or fcc (austenite) and b...
The addition of 2 wt% of aluminum to a Fe-0.4 wt% C martensitic steel led to the formation of a ferritic microfilm along the prior austenitic grain boundaries after austenitization and quenching. Both materials with and without Al exhibited a similar bulk hardness of 580 HV3 owing to their predominantly martensitic microstructure. Bending tests and...
The present study evaluates the active hydrogen trapping sites of three martensitic Fe-C alloys with a carbon content of 0.2 wt%, 0.4 wt% and 1.1 wt% by thermal desorption spectroscopy (TDS). The absence of additional alloying elements reduces the microstructural complexity and allows focussing on the carbon effects only. The TDS spectra are extrap...
Quenching & Partitioning (Q&P) steels owe their good strength-ductility combinations to the martensite/austenite (α’/γ) mechanical interactions and to the formation of mechanically-induced martensite (α′mech) through the transformation-induced plasticity (TRIP) effect. An essential role is played by carbon, whose distribution among the phases can b...
The present study investigated the local arrestability of intergranular crack in high-strength martensitic steel through multi-scale three-dimensional (3D) analysis using X-ray computed tomography and focused ion beam machining (FIB)-scanning electron microscopy (SEM) serial sectioning combined with electron backscattering diffraction (3D EBSD). Ma...
The magnetic scattering of iron carbides in low-alloy tool steel was investigated ex-situ by polarized small angle neutron scattering measurements after tempering the steel at 550 °C and 600 °C. Magnetic features could be detected in the as-quenched sample resulting in a negative interference term, believed to be either θ-Fe3C, η-Fe2C, or ε-Fe2-3C....
Electron Backscattering Diffraction (EBSD) provides important information to discriminate phase transformation products in steels. This task is conventionally performed by an expert, who carries a high degree of subjectivity and requires time and effort. In this paper, we question if Convolutional Neural Networks (CNNs) are able to extract meaningf...
This study focuses on the low cycle fatigue mechanism of the quenched 9Ni martensitic steel containing retainedaustenite films at martensite laths. HRTEM and EBSD suggested that extrusions developed along Low AngleBoundaries or along High Angle Boundaries at low and high strain respectively. Short cracks grew along LAB atlow strain while they used ...
