Results 31 to 40 of about 173 (125)

Application of the cellular automata method to modelling lower bainite in steels [PDF]

Computer Methods in Materials Science, 2012
Cellular automata model for bainitic transformation in steels is presented in the paper. Discrete character of the CA method allowed to reproduce formulation of carbides in the bainitic ferrite.
Grzegorz Jabłoński, Bogdan Pawłowski, Maciej Pietrzyk   +2 more
doaj   +1 more source

HWTS 50 Tool Steel Tailored for Laser Powder Bed Fusion: Sliding Wear of Bare Surfaces and Nitriding Response in Comparison with 18Ni300 and AISI H13

steel research international, EarlyView.
This work investigates the wear resistance and nitriding behavior of PBF‐LB/M‐processed Osprey HWTS 50, a lean hot work tool steel. Three heat treatment conditions are compared to conventional wrought H13, H11, and PBF‐LB/M 18Ni300. The study highlights HWTS 50's enhanced nitrogen diffusion, deeper nitriding hardness depth, and comparable or improved ...
Jonathan Hann, Giorgia Lupi, Sylvain Dossin, Riccardo Casati, Mandanà Moshiri, Arne Röttger, Faraz Deirmina   +6 more
wiley   +1 more source

Effect of pearlitic and bainitic initial microstructure on cementite spheroidization in rail steels

Journal of Materials Research and Technology, 2023
To improve the performance of the rails and wheels for the railway industry, new microstructures need to be researched. Nevertheless, the soft region observed in the weld heat-affected zone (HAZ), caused by the spheroidization of cementite, leads to ...
Henrique Boschetti Pereira, Edwan Anderson Ariza Echeverri, Dany Michell Andrade Centeno, Samuel da Silva de Souza, Luiz Felipe Bauri, Marcos Dorigão Manfrinato, Mohammad Masoumi, Luiz Henrique Dias Alves, Helio Goldenstein   +8 more
doaj   +1 more source

Phase Transformation Behavior of Continuously Cooled Fe–C–V–(Mo) Alloys

steel research international, EarlyView.
Additions of vanadium and molybdenum microalloying are shown to reshape phase transformations in clean low‐carbon steels. By tracking microstructural shifts during continuous cooling, the work uncovers the correlation between transformation kinetics, ferrite morphology, and hardness.
Anastasiya Tselikova, Jannik Zuraszek, Ulrich Krupp, Rolf Schmidt, Hardy Mohrbacher, Alexander Gramlich   +5 more
wiley   +1 more source

Enhancing the yield strength of intercritically annealed Q&P steel via bainite-based quenching and partitioning treatment

Journal of Materials Research and Technology, 2023
Intercritically annealed Q&P steels exhibit good strength-ductility synergies. Unlike fully austenized Q&P steels, intercritically annealed Q&P steels exhibit good ductility but contain a significant amount of ferrite, resulting in a lower yield strength
Ning Xu, Lingyu Wang, Jun Hu, Weilin Xue, Wei Xu   +4 more
doaj   +1 more source

Effect of Double Annealing on the Microstructure and Mechanical Properties of a Medium Manganese Steel

steel research international, EarlyView.
A double intercritical annealing strategy is proposed to tailor the multiphase microstructure and mechanical response of a medium‐Mn steel. The treatment produces an ultrafine mixture of ferrite, martensite and multiple austenite populations with graded thermal and mechanical stability, formed through austenite reversion and controlled retransformation.
Mattia Franceschi, Jose A. Jimenez, Carlos Garcia‐Mateo, Radhakanta Rana   +3 more
wiley   +1 more source

Influence of Mn on nanobainite formation kinetics and austenite retention in Al-added medium-Mn steels subjected to hybrid isothermal annealing

Journal of Materials Research and Technology
This study investigates the bainite transformation kinetics, microstructural evolution, and mechanical properties of Al-alloyed 3MnNb and 4MnNb multiphase steels subjected to a novel hybrid heat treatment.
Mateusz Morawiec, Jarosław Opara, Adam Skowronek, Alireza Kalhor, Aleksandra Kozłowska, Anna Wojtacha, Adam Grajcar   +6 more
doaj   +1 more source

Effect of Ausforming on Retained Austenite After Continuous Cooling Transformation in a Medium-Carbon High Strength Steel [PDF]

Materials Research, 2020
The effects of deformation on transformation kinetics during continuous cooling and microstructure evolution of a medium carbon high strength steel were investigated by metallographic method, dilatometry and X-ray diffraction etc.
Man Liu, Guang Xu, Xin Chen, Zhenye Chen, Ziliu Xiong   +4 more
doaj   +1 more source

Tailored Hardening and Isothermal Bainitizing of Additively Manufactured Nitrogen‐Enhanced Martensitic Chromium Steel

steel research international, EarlyView.
Tailored heat treatments transform additively manufactured high‐nitrogen martensitic Cr steel from austenitic as‐built condition to high‐hardness states. Isothermal bainitizing at 250°C generates an ultrafine nanostructure and achieves higher hardness than conventional hardening and tempering, highlighting a promising postprocessing route for laser ...
Philip König, Sebastian Weber, Jonathan Lentz   +2 more
wiley   +1 more source

Kinetics of the Bainite Transformation in Austempered Ductile Iron ADI [PDF]

Advances in Materials Science, 2016
Abstract The aim of the present research is to check an analytical model of the kinetics of bainite transformation that will enable the producers of ADI to optimise the microstructure and mechanical properties and minimise the expensive and extensive experimental trials.
openaire   +1 more source