Results 121 to 130 of about 289 (139)
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Mechanical properties of nanostructured bainitic steels
Materialia, 2021Abstract Nanostructured bainitic steels possess ultra-high strength and have been the focus of extensive research due to their suitability in many demanding engineering applications, especially in rail-wheel system, gears, bearings and automobile industry.
Avanish Kumar, Aparna Singh
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Annealing of a Nanostructured Bainitic Steel
Metallography, Microstructure, and Analysis, 2020Abstract This article describes a procedure for optimizing the annealed microstructure of a high Al KAB steel. The main focus is directed toward characterization of microstructural development during annealing of different phases in a nanostructured bainitic steel using high resolution transmission electron microscopy (HRTEM). This entry
Peter Kirbiš +3 more
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Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2016 We elucidate here the mechanistic contribution of the application of quenching and partitioning (QP) concept to a high carbon Mn-Si-Cr steel in obtaining a multiphase microstructure comprising of martensite/austenite and nanostructured bainite (bainitic ...
Guhui Gao, Zhunli Tan, Bingzhe Bai
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Toughness variations in nanostructured bainitic steels
Materials Science and Engineering: A, 2012Abstract Outstanding combination of strength and ductility in nanostructured bainitic steels makes them prone to be used as an important engineering material. However, there is still a necessity to investigate their toughness and effective parameters. This work aims to study the fracture toughness of these group of high strength carbide free bainitic
Behzad Avishan +2 more
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Effects of ausforming strain on bainite transformation in nanostructured bainite steel
International Journal of Minerals, Metallurgy, and Materials, 2017The effects of ausforming strain on bainite transformation in high-carbon low-alloy nanobainite steel were investigated using a Gleeble 3500 thermomechanical simulator machine. The bainite transformation speed at 300°C was found to be accelerated by ausforming at 300, 600, and 700°C under applied strains ranging from 10% to 50% followed by isothermal ...
Hong-liang Fan +4 more
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Developing very hard nanostructured bainitic steel
Materials Science and Engineering: A, 2013Abstract Novel nanostructured high carbon high silicon, carbide-free bainitic steels with very high strength and good ductility have been developed in the recent decade. In this work, an alloy with a high carbon content and no manganese was designed and cast. The prepared samples were heat treated through an austempering process in the range 200–350 °
H. Amel-Farzad +5 more
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Spheroidisation of hypereutectoid state of nanostructured bainitic steel
Materials Science and Technology, 2014Nanostructured bainite is extremely resistant to severe tempering making it difficult to reduce its hardness sufficiently to allow certain processing before heat treatment into its final state. An attempt is therefore made to introduce the divorced pearlite reaction that relies on the presence of pro-eutectoid cementite in the austenite in order to ...
D. Luo +5 more
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Deformation mechanisms in nanostructured bainitic steels under torsion
Materials Science and Engineering: A, 2020Abstract A clean high carbon steel was made using vacuum induction melting and three distinct nanostructures were obtained by austempering it at 250, 300 and 350 °C respectively after a similar austenitization treatment at 950 °C. A decrease in austempering temperature causes refinement of bainitic ferrite (BF) as well as retained austenite (RA ...
Avanish Kumar, Aparna Singh
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Materials Science and Technology, 2017 The effect of cathodic hydrogen-charging current on the effective hydrogen diffusivity in nanostructured bainitic steels produced at transformation temperatures 200 degrees C (BS200) and 350 degrees C (BS350) was investigated and compared to that of mild
M Bobby Kannan
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Solid State Phenomena, 2011
Nanostructured, low temperature bainitic steels with remarkable combination of ultimate tensile strength of about 2.5 GPa and high uniform elongation have been developed in the recent decade. To accelerate the bainitic transformation in theses steels, new chemical composition was designed by MUCG83 thermodynamic model which was developed in Cambridge ...
Mir Nariman Yoozbashi, Sasan Yazdania
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Nanostructured, low temperature bainitic steels with remarkable combination of ultimate tensile strength of about 2.5 GPa and high uniform elongation have been developed in the recent decade. To accelerate the bainitic transformation in theses steels, new chemical composition was designed by MUCG83 thermodynamic model which was developed in Cambridge ...
Mir Nariman Yoozbashi, Sasan Yazdania
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