We introduce a new update scheme to systematically improve the efficiency of parallel tempering Monte Carlo simulations by taking into account the temperature dependence of autocorrelation times. In contrast to previous attempts the temperatures are not dynamically adjusted but chosen in such a way that the acceptance rate for proposed exchanges of all adjacent replica is about 50%. We show tha...

the effect of ferrite grain size on the fatigue and tensile properties of dual phase steels with a 0.25 volumefraction of martensite (vm) under different heat treatments was investigated. the heat treatments werehomogenized at 1200 oc along with several subsequent normalizations at 910 oc, resulting in differentmicrostructures and mechanical properties. after heat treatment, the obtained steels...

despite having some useful properties, stainless steels suffer from lack of suitable surface hardness. in this research electroless ni-b-tl coating was used with the aim to increase their surface hardness. the effects of nickel chloride, sodium borohydride, thallium nitrate and ethylendiamin on the chemical composition of coating were studied. to achieve an increase in hardness, the effects of ...

In this work we report a study of the induced changes in structure and corrosion behavior of martensitic stainless steels nitrided by plasma immersion ion implantation (PI3) at different previous heat treatments. The samples were characterized by x-ray diffraction and glancing angle x-ray diffraction, scanning electron microscopy, energy dispersive x-ray spectroscopy, and potentiodynamic measur...

Abstract Advanced automotive industries generate large demand for the next generation of high strength and toughness spring steels. Vanadium-containing 55SiCrV steels subjected to rapid-induction heating treatment can fulfil such requirements. However, effect vanadium microalloying under online heat treatments is rarely reported. A comparative study microstructure tensile properties 55SiCr stee...

this paper provides an overview on obtaining low-carbon ultra-fine grained dual-phase steels through rapid intercritical annealing of cold-rolled sheet as improved materials for automotive applications. a laboratory processing route was designed that involves cold-rolling of a tempered martensite structure followed by a second tempering step to produce a fine grained aggregate of ferrite and ca...

Ledeburitic tool steel X210Cr12 was processed by passing through a semi-solid state with subsequent forming on hydraulic press, thus achieving fine-grained martensitic matrix, uniformly dispersed fine precipitates, and removal of sharp-edged primary chromium carbides. The hardness value over 700 HV10. decomposition austenite the promotion further carbide precipitation were carried out cryogenic...

12Cr2Ni4A steel is a high-quality alloy structural steel. This article explores the surface/sub-surface condition, surface roughness, and micromorphology of carburizing quenching after carbon nanotubes (CNTs) fluid casting grinding, quality burn condition workpiece are characterized by analyzing microhardness micro-morphology workpiece. The test results indicate that high heat transfer capacity...