Results 21 to 30 of about 731 (178)

Formation of lower bainite in a high carbon steel – an in-situ synchrotron XRD study

Journal of Materials Research and Technology, 2022
The microstructural evolution of and simultaneous dimensional changes in high-carbon SAE 52100 bearing steel were monitored continuously during austempering for 120 min at selected temperatures in the range of 210 °C-270 °C, and also during its ...
D. Foster, M. Paladugu, J. Hughes, M. Kapousidou, U. Islam, A. Stark, N. Schell, E. Jimenez-Melero   +7 more
doaj   +1 more source

Slow Bainite: an Opportunity to Determine the Carbon Content of the Bainitic Ferrite during Growth

Solid State Phenomena, 2011
The amount of carbon in solid solution in bainitic ferrite at the early stage of transformation has been directly determined by atom probe tomography at 200 °C, taking advantage of the extremely slow transformation kinetics of a novel nanocrystalline steel.
Francisca G. Caballero, Michael K. Miller, Carlos Garcia-Mateo   +2 more
openaire   +2 more sources

Morphology of Widmanstätten and Bainitic Ferrites

Materials Transactions, JIM, 1991
The morphologies of isothermally transformed Widmanstatten and bainitic ferrites in a low carbon low alloy steel have been investigated by means of optical and electron microscopies. In the steel investigated, the Widmanstatten ferrite grains nucleated from the ferrite grain boundary allotriomorphs in the temperature range between 625 and 600 o C ...
Okaguchi, Shuji, Ohtani, Hiroo, Ohmori, Yasuya   +2 more
openaire   +2 more sources

Influence of Chromium Content on the Microstructure and Mechanical Properties of Thermomechanically Hot-Rolled Low-Carbon Bainitic Steels Containing Niobium

Applied Sciences, 2020
The effect of chromium content in the range of 1 wt.%−4 wt.% on the microstructure and mechanical properties of controlled-rolled and direct-quenched 12 mm thick low-carbon (0.04 wt.%) steel plates containing 0.06 wt.% Nb has been studied. In these
Mohammed Ali, Tun Nyo, Antti Kaijalainen, Jaakko Hannula, David Porter, Jukka Kömi   +5 more
doaj   +1 more source

Two design strategies for enhancing the thermal stability of bainitic structures

Journal of Materials Research and Technology, 2023
In response to the growing interest of the industry in advanced high-strength steels subjected to extreme operating conditions, two novel grades BainTS and BainNiAlCu bainitic steels have been developed.
Aleksandra Królicka, Francisca G. Caballero, Roman Kuziak, Krzysztof Radwański, Liwia Sozańska-Jędrasik, Piotr Stawarczyk   +5 more
doaj   +1 more source

Effect of Bainite Volume Fraction on Deformability of Mesostructures for Ferrite/Bainite Dual‐Phase Steel

Advances in Materials Science and Engineering, 2020
To obtain high strength and excellent deformability for ferrite/bainite dual‐phase (F/B DP) pipeline steel for gas pipelines based on strain‐based design, the volume fractions of ferrite and bainite should be considered first. In this work, abstract representative volume elements (RVE) of finite element models (FEMs) of mesostructure for F/B DP ...
Gui-ying Qiao, Zhong-tao Zhao, Xian-bo Shi, Jun-si Wang, Fu-ren Xiao   +4 more
openaire   +2 more sources

C-Curves for Lengthening of Widmanstätten and Bainitic Ferrite [PDF]

Metallurgical and Materials Transactions A, 2017
Abstract Widmanstätten ferrite and bainitic ferrite are both acicular and their lengthening rate in binary Fe-C alloys and low-alloyed steels under isothermal conditions is studied by searching the literature and through new measurements. As a function of temperature, the lengthening rate can be represented by a common curve for both kinds of
Yin, Jiaqing, Leach, Lindsay, Hillert, Mats, Borgenstam, Annika   +3 more
openaire   +2 more sources

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

Journal 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, Conrado Ramos Moreira Afonso   +1 more
doaj   +1 more source

Retained Austenite Destabilization during Tempering of Low-Temperature Bainite

Applied Sciences, 2020
The thermal stability of nanostructured microstructures consisting of a mixture of bainitic ferrite and carbon-enriched retained austenite has been studied in two steels containing 0.6 C (wt %) by tempering cycles of 1 h at temperatures ranging from 450 ...
Victor Ruiz-Jimenez, Matthias Kuntz, Thomas Sourmail, Francisca G. Caballero, Jose A. Jimenez, Carlos Garcia-Mateo   +5 more
doaj   +1 more source

Introducing ultrafine ferrite in low-temperature bainitic steel through a novel process for simultaneously improving strength and toughness

Journal of Materials Research and Technology, 2021
A novel process is proposed to introduce ultrafine ferrite in a medium-carbon high-silicon steel that possesses low-temperature bainite. This process is based on the intercritical annealing of the cold-rolled tempered troostite and subsequent ...
Ting Zhao, Xin Jia, Chen Chen, Fucheng Zhang, Tiansheng Wang   +4 more
doaj   +1 more source