Results 31 to 40 of about 387 (175)

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

Alteration of Phase Transformation Behavior and Prior Austenite Grain Structure Due to Elevated Tramp Element Concentrations in a Hypoeutectoid Steel

steel research international, EarlyView.
The phase transformation behavior of a hypoeutectoid steel is studied in comparison with alloys containing higher concentrations of tramp elements, simulating high recycling rates. The examination of microstructures reveals that the tramp elements facilitate the formation of displacive phases along with retained austenite.
Lukas Hatzenbichler, Marek Gocnik, Phillip Haslberger, Matthew Galler, Andreas Stark, Oleksandr Glushko, Jozef Keckes, Ronald Schnitzer   +7 more
wiley   +1 more source

Alloy Qualification for Producing Quench and Tempered Plate Steels with Extra‐Heavy Gage

steel research international, EarlyView.
This study develops alloy concepts for ultraheavy steel plates (>100 mm) with ≥690 MPa yield strength. Through dilatometry and Jominy testing, the effects of Mo, Ni, and B on hardenability are quantified. A synergy between 0.5% Mo and 0.5%–1.0% Ni ensures core strength at low cooling rates, while boron microalloying suppresses ferrite and promotes ...
Xabier Azpeitia, Unai Mayo, Nerea Isasti, Eric Detemple, Hardy Mohrbacher, Pello Uranga   +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

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

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

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

Exploiting Residual Elements Arising from Scrap Steel in Future Sustainable Steel Alloy Design

steel research international, EarlyView.
Herein, the effects of residual elements Cu and Sn on grain growth, recrystallization, and phase transformation in C–Mn steel are summarized, and a case study is presented on how the presence of residual elements can be exploited to reduce deliberate Nb microalloying while achieving the same grain size control and strength during thermomechanical ...
Claire Davis, Carl Slater, Yulin Ju, Jiaqi Duan, Pedram Dastur, Martin Strangwood   +5 more
wiley   +1 more source

Experimental and Modelling Research on the Effect of Prior Ferrite on Bainitic Transformation in Medium-Carbon Bainitic Steel

Crystals
In this study, we investigate the impact of prior ferrite on the bainite transformation kinetics and microstructure of medium-carbon steel interrupted by an intercritical annealing (IAA) process.
Xinpan Yu, Wei Liu, Kang He, Tengfei Wang, Gang Niu, Huibin Wu   +5 more
doaj   +1 more source