Results 71 to 80 of about 387 (175)

Transformation Kinetics of Bainite during Isothermal Holding and Continuous Cooling

Tetsu-to-Hagane, 1982
The isothermal and continuous cooling transformation kinetics of bainite were studied using an automatic quench dilatometer. It was found that the overall isothermal bainite transformation kinetics were well expressed by Johnson-Mehl type equation and that the transformation rate decreased with increase in the austenite grain size.
UMEMOTO, Minoru, HORIUCHI, Kazunari, TAMURA, Imao   +2 more
openaire   +2 more sources

In-situ investigation on the morphological evaluation of bainitic microstructure of medium C-steel

Discover Materials
The bainitic transformation behavior and microstructural evolution in C–Mn–Si steel were investigated using in-situ Laser Scanning Confocal Microscopy (LSCM) and dilatometry.
Soumyadarshi Saswat Mahapatra, Md. Basiruddin Sk, Prakash Srirangam, Soumitra Kumar Dinda   +3 more
doaj   +1 more source

Investigating the role of the austenitizing temperature and cooling rate on the martensitic transformation kinetics in a SAE 9254 spring steel

Journal of Alloys and Metallurgical Systems
The effect of austenitizing temperature (ranging from 850 to 1050 °C) and cooling rates on the phase transformations were investigated, particularly when a two cooling steps protocol was adopted.
Silvano Leal dos Santos, Felipe Ribeiro Toloczko, Davinson Mariano da Silva, Sydney Ferreira Santos   +3 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

Impact of hot and warm deformation on the bainite morphology and kinetics during continuous cooling of low- and medium-C carbide-free bainitic steels

Materials & Design
This work aims to describe the microstructural evolution of bainite during continuous cooling from austenite with varying grain size, morphology and defect density in two carbide-free bainitic steels with low and medium C contents.
Pedro José de Castro, Antonio Carlos de Figueiredo Silveira, Alexandre da Silva Rocha, Andreas Stark, Thomas Sourmail, Jérémy Epp   +5 more
doaj   +1 more source

Study on Phase Transformation in Hot Stamping Process of USIBOR^® 1500 High-Strength Steel

Metals, 2019
Based on the Kirkaldy-Venugopalan model, a theoretical model for the phase transformation of USIBOR® 1500 high strength steel was established, and a graph of the phase transformation kinetics of ferrite, pearlite, and bainite were plotted using the ...
Pengyun Zhang, Le Zhu, Chenyang Xi, Junting Luo   +3 more
doaj   +1 more source

The Austempering Kinetics, Microstructural Development and Processing Window in the Austempered, FE-3.2C-4.8AL Compacted Graphite Cast Iron

Iranian Journal of Materials Science and Engineering, 2020
In the present study, austempering heat treatment was performed on compacted graphite aluminum cast iron with the chemical composition of 4.8%wt Al, 3.2%wt C, 0.81%wt Ni, 0.37%wt Mn, and 0.02%wt Mg.
A. Kazazi, S. M. Montazeri, S. M. A. Boutorabi   +2 more
doaj  

Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel

Journal of Materials Research and Technology
In this work, a strategy is proposed by combining prior cold deformation with chronological control of phase transformation to achieve ultrafine martensite-bainite duplex microstructures in GCr15 bearing steel, which is the specimens with 0∼45 % prior ...
Xiaohui Lu, Guanglin Yuan, Xuanhong Yan, Rushan Lu, Huajie Shi, Yinsong Chen, Dongsheng Qian, Lin Hua   +7 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

Effect of prior martensite on bainitic transformation of high Si hypereutectoid steel

Journal of Materials Research and Technology
The paper discusses the effect of prior martensite on the bainitic transformation of a high Si hypereutectoid steel. The research uses a combination of experimental techniques, high-resolution dilatometry and X-ray diffraction analysis, and theoretical ...
Carlos Garcia-Mateo, Thomas Sourmail, Amandine Philippot, Lucia Morales-Rivas, Jose A. Jimenez   +4 more
doaj   +1 more source