Results 21 to 30 of about 1,989 (204)

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

Journal 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, Minqiang Zou, Liang Qi, Olanrewaju A. Ojo, Zhigang Wang   +4 more
doaj   +1 more source

In-situ observation of phase transformation during heat treatment process of high-carbon bainitic bearing steel

Journal of Materials Research and Technology, 2022
Phase transformation during austenitizing process and heat treatment process under slow cooling of high-carbon bainitic bearing steel is still unclear. Direct nano-scale microscopic observation and in-situ X-ray diffraction investigations have been used ...
Dongyun Sun, Jun Zhao, Minghe Zhang, Qiwen Fang, Xiaoyan Long, Fucheng Zhang, Zhinan Yang   +6 more
doaj   +1 more source

Three-Dimensional Observation of Upper Bainite in the Initial Stage of Transformation in 0.4 wt%C TRIP Steel

Metals, 2023
Three-dimensional microstructures of bainitic ferrites and prior austenite grains (PAGs) were observed in the initial stage of upper bainite transformation by using a serial sectioning technique and orientation analysis by electron back scattering ...
Shotaro Jimbo, Shoichi Nambu
doaj   +1 more source

Stability of retained austenite and work hardening behavior in ultra-fine medium carbon bainitic steel

Journal of Materials Research and Technology, 2023
The effect of retained austenite stability on plastic deformation was investigated by stepwise tensile test of medium carbon steel material at two different bainite isothermal temperatures below or above the martensite start (Ms) point.
Tingting He, Lu Wang, Feng Hu, Wen Zhou, Zhicheng Zhang, Kaiming Wu   +5 more
doaj   +1 more source

Effect of austempering temperature on the microstructure and wear resistance of ultrafine bainitic steel

工程科学学报, 2018
Ultrafine bainitic steels, which are derived from nanostructured carbide-free bainitic steels, exhibit a remarkable combination of ultra-high strength and toughness together with excellent wear resistance. Their excellent integrated mechanical properties
ZHANG Chao, GUO Hui, WANG Jia-xing, ZHANG Bing, ZHAO Ai-min   +4 more
doaj   +1 more source

Modeling of bainitic phase transformation [PDF]

PAMM, 2010
AbstractIn this work, we present a macroscopic material model for simulation of austenite to bainite and of austenite to martensite transformations accompanied by transformation‐induced plasticity (TRIP), which is an important phenomenon in metal forming processes.
Andreas Schneidt, Rolf Mahnken
openaire   +1 more source

Modeling Bainitic Transformations during Press Hardening [PDF]

Materials, 2021
We revisit recent findings on experimental and modeling investigations of bainitic transformations under the influence of external stresses and pre-strain during the press hardening process. Experimentally, the transformation kinetics in 22MnB5 under various tensile stresses are studied both on the macroscopic and microstructural level. In the bainitic
Mingxuan Lin, Carina Zimmermann, Kai Wang, Martin Hunkel, Ulrich Prahl, Robert Spatschek   +5 more
openaire   +4 more sources

Transferring Nanoscale Bainite Concept to Lower C Contents: A Perspective

Metals, 2017
The major strengthening mechanisms in bainitic steels arise from the bainitic ferrite plate thickness rather than the length, which primarily determines the mean free slip distance.
Carlos Garcia-Mateo, Georg Paul, Mahesh C. Somani, David A. Porter, Lieven Bracke, Andreas Latz, Carlos Garcia De Andres, Francisca G. Caballero   +7 more
doaj   +1 more source

New insights into the effects of deformation below-MS on isothermal kinetics of bainitic transformation

Journal of Materials Research and Technology, 2020
Both ausforming and austempering below the martensite start temperature (MS) have been shown to accelerate the bainitic transformation. This work investigates the combined effects of deformation and austempering below the MS on the isothermal ...
Haijiang Hu, Junyu Tian, Guang Xu, Hatem S. Zurob   +3 more
doaj   +1 more source

Investigating the Difference in Mechanical Stability of Retained Austenite in Bainitic and Martensitic High-Carbon Bearing Steels using in situ Neutron Diffraction and Crystal Plasticity Modeling

Metals, 2019
In situ neutron diffraction of the uniaxial tension test was used to study the effect of the surrounding matrix microstructure on the mechanical stability of retained austenite in high-carbon bearing steels.
Rohit Voothaluru, Vikram Bedekar, Dunji Yu, Qingge Xie, Ke An, Praveen Pauskar, R. Scott Hyde   +6 more
doaj   +1 more source