The control of carbide formation is crucial for the development of advanced steels. One of the more stable carbides occurring at room temperature ageing of martensite is n-Fe2C. In this work, we study structural transformations which occur during low-temperature ageing in Fe-C martensite using computer modelling based on the atomic density field me...
This study investigated the spread of the martensite transformation, i.e., the extent of the transformation as a function of the temperature, via the development of a model focusing on the stabilization of residual austenite along the transformation rather than describing the nucleation processes of each individual unit of martensite. The stabiliza...
Medium Mn steels belong to a new generation of advanced high-strength steels whose superior mechanical properties are explained by their ultrafine-grained ferrite/austenite/martensite microstructures and a possible transformation induced plasticity (TRIP) related to the stability of retained austenite. The mechanical behaviour of a set of model med...
Advanced (ultra)high-strength steels that utilise bcc-fcc microstructures are appealing solutions for producing a combination of high strength and deformability. However, they are also susceptible to hydrogen embrittlement (HE). As larger less stable retained austenite (RA) can impair mechanical performance, its size and morphology are critical fac...
VDL Weweler has developed a novel heat treatment approach for their trailing arms, which eliminates the traditional austenisation step and instead capitalises on the inherent heat used for hot-forming to austenise the steel before quenching. This not only saves energy, but surprisingly also improves the lifetime of the products. The underlying reas...
Published in International dental journal
The aim of this study was to assess the dynamic cyclic fatigue resistance of an R-Motion file at simulated body temperature and document corresponding phase transformations compared to OneCurve and HyFlex EDM (HFEDM). R-Motion (25/.06), OneCurve (25/.06), and HFEDM (25/.06) files were selected and divided into 3 groups (n = 9) according to the file...
Within the literature significant variations in martensite start temperature (Ms) can be observed for samples of identical composition. However, the factors affecting Ms are not well understood, limiting industrial uptake. Recently, claims that the isothermal variant of the ω phase (ωiso) may be driving many changes in Ms have been called into ques...
Předložená práce se zabývá studiem nízkosymetrických fází (martensitů) Heuslerových slitin na bázi Ni-Mn-Ga, zejména pomocí metod rentgenové a neutronové difraktometrie. Důraz je kladen na základní výzkum v několika klíčových a dosud nevysvětlených tématech oboru. Kromě toho se zaměřuje na standardizaci několika pokročilých difrakčních metod vhodný...
High Manganese Austenitic Steel (HMnAS) is a novel steel exhibiting excellent mechanical properties at arctic temperatures. Defense Material Organisation (DMO) is interested in the feasibility of using HMnAS in their navy's ships alongside EH36 high-strength shipbuilding steel, using 307PF stainless steel weld filler metal.
The feasibility of using ...
Localised laser treatments enable the creation of sophisticated austenite/martensite mesostructures in Fe–Ni–C steel with the potential of achieving enhanced mechanical performance. The control of phase topology is essential to modify the properties of these structures on demand and requires a profound understanding of the effect of the processing ...
