Results 11 to 20 of about 14,484 (149)

Arbitrarily slow, non-quasistatic, isothermal transformations [PDF]

open access: yesEPL (Europhysics Letters), 2016
For an overdamped colloidal particle diffusing in a fluid in a controllable, virtual potential, we show that arbitrarily slow transformations, produced by smooth deformations of a double-well potential, need not be reversible. The arbitrarily slow transformations do need to be fast compared to the barrier crossing time, but that time can be extremely ...
Gavrilov, Momčilo, Bechhoefer, John
openaire   +3 more sources

Influence of Austenitisation Temperature and Time on Martensitic and Isothermal Bainite Phase Transformation of Spring Steel

open access: yesMetals, 2022
The influence of austenitisation temperature and time on the martensitic and isothermal bainite transformation of 51CrV4 spring steel was analysed. Based on the analysis of dilatometric curves, the martensite start temperatures (MS) were determined at ...
Anže Bajželj, Jaka Burja
doaj   +1 more source

THE BIANCHI–DARBOUX TRANSFORM OF L-ISOTHERMIC SURFACES [PDF]

open access: yesInternational Journal of Mathematics, 2000
We study an analogue of the classical Bäcklund transformation for L-isothermic surfaces in Laguerre geometry, the Bianchi–Darboux transformation. First we show how to construct the Bianchi–Darboux transforms of an L-isothermic surface by solving an integrable linear differential system, then we establish a permutability theorem for iterated Bianchi ...
MUSSO, EMILIO, NICOLODI, L.
openaire   +4 more sources

The Study of Phase Transformation Behaviors for 38MnB5Nb Ultra High-Strength Steel by CCT Curves and TTT Curves

open access: yesMetals, 2023
To elucidate the phase transformation behaviors for 38MnB5Nb ultra high-strength steel, the continuous cooling transformation (CCT) and time-temperature-transformation (TTT) curves were determined by the thermal expansion method with different cooling ...
Ping Luo   +8 more
doaj   +1 more source

Method to Evaluate the Kinetics of Bainite Transformation in Low-Temperature Nanobainitic Steel Using Thermal Dilatation Curve Analysis

open access: yesMetals, 2017
The aim of this work was to develop a method to evaluate the kinetics of bainite transformation by theoretical deduction and thermal dilatation curve analysis. A Gleeble-3500 thermomechanical simulator and dilatometer (DIL805A) were employed to study the
Yaowen Xu   +4 more
doaj   +1 more source

Isothermal Performance of Heat Pipes: A Review

open access: yesEnergies, 2022
Heat pipes transfer heat via phase transformation of the working fluid, where the working fluid will keep the temperature constant and absorb or release a large amount of latent heat during phase transformation.
Hongzhe Zhang   +3 more
doaj   +1 more source

Prediction of Hardenability from Isothermal Transformation Diagram

open access: yesTetsu-to-Hagane, 1981
An analytical method for evaluation of quantitative hardenability of eutectoid steels from the corresponding TTT diagram was considered. The isothermal transformation kinetics of pearlite and cooling curves were combined by the additivity rule, and an equation expressing continuous cooling transformation of pearlite has been derived.
Minoru Umemoto   +2 more
openaire   +3 more sources

Kinetic models of multiple-stage martensite transformation and subsequent isothermal bainite formation excluding ε-carbide precipitation in intercritical quenching and partitioning steels

open access: yesMaterials & Design, 2019
The kinetic models of multiple-stage martensite transformation and subsequent isothermal bainite formation were investigated in intercritical quenching and partitioning steels. The modified K-M model that considering instantaneous kinetic characteristics
Fei Peng   +3 more
doaj   +1 more source

Combined athermal and isothermal martensite to austenite reversion kinetics, experiment and modelling

open access: yesMaterials & Design, 2020
A novel laser heat treatment setup is presented and used to characterize the reverse transformation of martensite to austenite resulting from highly dynamic laser heat treatments of stainless steel.
H. Kooiker   +2 more
doaj   +1 more source

A Rapid, Open-Source CCT Predictor for Low-Alloy Steels, and Its Application to Compositionally Heterogeneous Material

open access: yesMetals, 2023
The ability to predict transformation behaviour during steel processing, such as primary heat treatments or welding, is extremely beneficial for tailoring microstructures and properties to a desired application.
Joshua Collins   +4 more
doaj   +1 more source

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