Results 41 to 50 of about 158 (142)

Microstructural Changes of the Nanostructured Bainitic Steel Induced by Quasi-Static and Dynamic Deformation

Archives of Metallurgy and Materials, 2017
Changes in the microstructure of nanostructured bainitic steel induced by quasi-static and dynamic deformation have been shown in the article. The method of deformation and strain rate have important impact on the microstructure changes especially due to
Marcisz J., Burian W., Rozmus R., Janiszewski J.   +3 more
doaj   +1 more source

Reverse Hall–Petch Effect of Nano-Bainite in a High-Carbon Silicon-Containing Steel

Metals
High-strength steels are widely used in various mechanical production and construction industries for their low cost, high strength and high toughness. Among these, bainitic steels have better comprehensive performance relative to martensite and ferrite.
Xin Zhang, Zixuan Shao, Muqun Sun, Tianyu Cui, Qingsuo Liu, Jian Han   +5 more
doaj   +1 more source

Development of and Perspective on High-Performance Nanostructured Bainitic Bearing Steel

Engineering, 2019
Bearings are the most important component of nearly all mechanical equipment, as they guarantee the steady running of the equipment, which is especially important for high-end equipment such as high-speed trains and shield tunneling machines ...
Fucheng Zhang, Zhinan Yang
doaj   +1 more source

Synchrotron analysis of toughness anomalies in nanostructured bainite

Acta Materialia, 2016
AbstractHigh-resolution synchrotron X-ray diffraction has been used to characterise the notch root regions of Charpy impact test specimens of a superbainitic steel, both before and after loading. The changes in the volume fraction of austenite induced by the application of a three-point-bending load were quantified.
Fielding, L.C.D., Jones, N.G., Walsh, J., Van Boxel, S., Blackmur, M.S., Lee, P.D., Withers, P.J., Stone, H.J., Bhadeshia, H.K.D.H.   +8 more
openaire   +5 more sources

In Situ Observation on the Effects of Prior Martensite Formation on Nanostructured Low–Temperature Bainite Transformation

Metals, 2018
Nanobainite transformation behavior was comparably studied using in situ observations for two heat treatments: With and without partial quenching before isothermal holding at 300 °C.
Wen Zhou, Tingping Hou, Lang Tao, Kaiming Wu   +3 more
doaj   +1 more source

Effect of Dislocation Density on Deformation Behavior of Super Strong Bainitic Steel

Journal of Advanced Materials in Engineering, 2017
Presence of nanoscale bainitic ferrites and high carbon retained austenites that are stable at ambient temperature within the microstructures of super strong bainitic steels makes it possible to achieve exceptional strengths and ductility properties in ...
B. Avishan
doaj   +2 more sources

Ultrafast Heating and Initial Microstructure Effect on Phase Transformation Evolution of a CrMo Steel

Metals, 2019
Main target of the present work is to elucidate the effect of both initial microstructure and heating rate on phase transformations that occur during ultrafast processing.
Spyros Papaefthymiou, Vassilios Karamitros, Marianthi Bouzouni   +2 more
doaj   +1 more source

Effects of two-step austempering processes on the wear resistance and fatigue lifetime of high-carbon nanostructured bainitic steel

Journal of Materials Research and Technology
The previous research on two-step austempering processes have been mainly focused on the bainitic transformation kinetics, with few details the relationships between the parameters of two-step austempering process and the wear properties and fatigue ...
Dongyun Sun, Xiaoyong Feng, Peng Zhang, Xiaowen Sun, Zhinan Yang, Xiaoyan Long, Fucheng Zhang   +6 more
doaj   +1 more source

Strengthening and mechanical stability mechanisms in nanostructured bainite [PDF]

Journal of Materials Science, 2013
Understanding the main relationships between the microstructure parameters controlling the strength and ductility of low temperature bainitic microstructures is of considerable importance for further development of these grades. Although the microstructure essentially consists of solely two phases, bainitic ferrite and retained austenite, the ...
Avishan, B., García Mateo, Carlos, Morales-Rivas, Lucía, Yazdani, Sasan, García Caballero, Francisca   +4 more
openaire   +2 more sources

Low-Alloyed Spring Steel: Nanostructure and Strength After Austempering

Metals
Carbide-free bainite microstructures were developed in 0.6 wt.%–2 wt.% Si spring steel via austempering at 250 °C. Heat treatment included austenization with subsequent isothermal holding at 250 °C, varying the holding duration to 1.0, 1.5, or 2.0 h with
Mikhailo Brykov, Vasily Efremenko, Isabella Gallino, Ivan Petrišinets, Oleksii Kapustyan, Olexandr Klymov, Alexey Efremenko, Vasyl’ Girzhon   +7 more
doaj   +1 more source