Results 11 to 20 of about 1,996 (186)

Effect of isothermal and pre-transformation temperatures on microstructure and properties of ultrafine bainitic steels

open access: yesJournal of Materials Research and Technology, 2021
The effects of isothermal and pre-transformation temperatures on the microstructure and mechanical properties of ultrafine bainitic steels are investigated and theoretically analyzed by using optical microscopy, scanning electron microscopy, transmission
Chengcong Huang   +4 more
doaj   +1 more source

Bainite transformation under the effect of large stress in a carbide-free bainite steel

open access: yesJournal of Materials Research and Technology, 2023
The effects of large stress on bainite transformation and microstructure were investigated by dilatometry, SEM and EBSD. The results show that the effect of large stress on bainite transformation includes two parts: mechanical driving force and prior ...
Mingxing Zhou   +5 more
doaj   +1 more source

Nanostructured bainite [PDF]

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2009
An alloy system based on iron is described in which it has been possible to create a high density of interfaces by heat treatment alone. The resulting structure consists of a mixture of slender platelets of bainitic ferrite, just 20–40 nm in thickness, embedded in a matrix of carbon-enriched austenite.
openaire   +1 more source

Bainite kinetic transformation of austempered AISI 6150 steel

open access: yesJournal of Materials Research and Technology, 2020
This research studies the kinetic transformation and austempering temperature effect on the morphologies of bainite for AISI 6150 steel. A minimum of 10 different holding times for each austempering temperature were utilized.
Xue Han   +6 more
doaj   +1 more source

Effect of Ni addition on bainite microstructure of low-carbon special bar quality steels and its influence on CCT diagrams

open access: yesJournal of Materials Research and Technology, 2021
This work presents the effect of Ni content on the bainite morphology and in the mechanical properties of low-carbon special bar quality steels. Four steel ingots with the same base chemical composition, having only Ni content as their main difference ...
José Britti Bacalhau   +1 more
doaj   +1 more source

Continuous Cooling Transformation Diagrams of 2.25Cr-1Mo-0.25V Submerged-Arc Weld Metal and Base Metal

open access: yesMetals, 2020
The transformation behavior and microstructural evolution during continuous cooling within the heat affected zone between the weld beads of a 2.25Cr-1Mo-0.25V all-weld metal and the corresponding 2.25Cr-1Mo-0.25V base metal were investigated by means of ...
Hannah Schönmaier   +6 more
doaj   +1 more source

Variant Pairing of Lath Bainite and Martensite in an Ultra-High-Strength Steel

open access: yesMetals, 2022
The mixed structure of lath bainite and martensite was obtained by isothermal transformation tests at 698 K, 673 K and 623 K in ultra-high-strength steel. The interweaving mode of lath bainite and martensite was revealed by colored metallography and band
Meiying Li   +3 more
doaj   +1 more source

Transformation kinetics of carbide-free bainitic steels during isothermal holding above and below MS

open access: yesJournal of Materials Research and Technology, 2020
The transformation kinetics of a low carbon bainitic steel was investigated using in situ confocal microscopy and dilatometry for isothermal treatments above and below the martensite start (MS) temperature.
Junyu Tian, Dr.   +4 more
doaj   +1 more source

Intrinsic Mechanisms of Ductile-brittle Transition for F460 Steel Welding Coarse Grained Heat Affected Zones with Different Heat Inputs

open access: yesCailiao gongcheng, 2016
Coarse grain heat affected zone (HAZ) of F460 steel was simulated by a Gleeble 3800 thermo-mechanical simulator. The microstructure, critical event of the HAZ formed at various heat inputs (E) were characterized and determined by optical microscopy (OM ...
LI Jing   +4 more
doaj   +1 more source

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

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