Browsing Engineering by Author "Epp, Jérémy"
Now showing items 1-13 of 13
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Austenitic grain size prediction in hot forging of a 20MnCr5 steel by numerical simulation using the JMAK model for industrial applications
Ivaniski, Thiago Marques; Epp, Jérémy; Zoch, Hans-Werner; Rocha, Alexandre da Silva (2019) [Journal article]Yield strength and toughness in steels are directly associated with hot forging processes, especially by controlling austenitic grain size and cooling conditions. The phenomenological JMAK model in macroscale has been ... -
Bending distortion analysis of a steel shaft manufacturing chain from cold drawing to grinding
Dias, Vinicius Waechter; Rocha, Alexandre da Silva; Zottis, Juliana; Dong, Juan; Epp, Jérémy; Zoch, Hans-Werner (2017) [Journal article]Shafts are usually manufactured from bars that are cold drawn, cut machined, induction hardened, straightened, and finally ground. The main distortion is characterized by bending that appears after induction hardening and ... -
Constitutive modelling of high temperature flow behaviour for a low carbon high silicon bainitic steel
Ivaniski, Thiago Marques; Souza, Tomaz Fantin de; Epp, Jérémy; Rocha, Alexandre da Silva (2020) [Journal article]It is well recognized the importance of the rheological characterization for the development of the steel in thermomechanical treatments, especially for the mechanical properties improvement of bainitic steels in subsequent ... -
Effect of compressive deformations on the final microstructure of a low carbon high silicon bainitic steel thermomechanically processed
Hatwig, Rodrigo Afonso; Dong, Juan; Epp, Jérémy; Rocha, Alexandre da Silva (2021) [Journal article]Due to a combination of advantages, high-performance steel components, especially for automotive manufacturing applications, are generally forged parts. In the forging industry, bainitic steels are being increasingly used, ... -
Experimental analysis of residual stresses in pre-straightened SAE 1045 steel
Soares, Carla Adriana Theis; Rocha, Alexandre da Silva; Epp, Jérémy; Zoch, Hans-Werner (2017) [Journal article]This paper aims at analyzing the effects of the roller pre-straightening of wire-rods on residual stress distributions in SAE 1045 steel bars. The combined drawing process is used in industrial production of bars in order ... -
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure
Silveira, Antonio Carlos de Figueiredo; Bevilaqua, William Lemos; Dias, Vinicius Waechter; Castro, Pedro José de; Epp, Jérémy; Rocha, Alexandre da Silva (2020) [Journal article]Thermomechanical processing of low carbon bainitic steels is used to obtain a bainitic microstructure with good strength and toughness by continuous cooling after forging without the need of further heat treating, hence ... -
In situ investigation of the bainitic transformation from deformed austenite during continuous cooling in a low carbon Mn-Si-Cr-Mo steel
Bevilaqua, William Lemos; Epp, Jérémy; Meyer, Heiner; Rocha, Alexandre da Silva; Roelofs, Hans (2020) [Journal article]The effects of hot deformation on the bainitic transformation of a low carbon steel during continuous cooling were comprehensively studied through in situ high-energy synchrotron X-ray diffraction, dilatometry, and ex situ ... -
Investigation of the influence factors on distortion in induction-hardened steel shafts manufactured from cold-drawn rod
Dong, Juan; Epp, Jérémy; Rocha, Alexandre da Silva; Nunes, Rafael Menezes; Zoch, Hans-Werner (2016) [Journal article]In this study, the distortion of steel shafts was investigated before and after induction hardening. Several essential influencing factors in the manufacturing process chain regarding cold drawing, cutting method, notches ... -
Microestrutura e propriedades de desgaste do aço bainítico de resfriamento contínuo DIN 18MnCrSiMo6-4 nitretado a plasma em diferentes temperaturas
Dalcin, Rafael Luciano; Oliveira, Leonardo Fonseca; Rocha, Alexandre da Silva; Malfatti, Célia de Fraga; Hidalgo, Gelsa Edith Navarro; Epp, Jérémy; Zoch, Hans-Werner (2020) [Journal article]Os novos aços bainíticos de resfriamento contínuo (CCBS) são uma excelente alternativa quando se requer elevada dureza, tenacidade e resistência à fadiga. Contudo, estima-se que a taxa de desgaste dos CCBS seja insuficiente ... -
Numerical and experimental study of an industrial case for grain size evolution in bainitic steel in controlled hot forging and its influence on mechanical performance
Ivaniski, Thiago Marques; Castro, Pedro José de; Rodrigues, Douglas Rodrigues de; Epp, Jérémy; Nunes, Rafael Menezes; Rocha, Alexandre da Silva (2022) [Journal article]Controlling the recrystallization is an important way to reach grain size refinement and outstanding strength and toughness on alloy metals. This study sets out the application and investigation of mathematical microstructure ... -
Revealing the dynamic transformation of austenite to bainite during uniaxial warm compression through in-situ synchrotron X-ray diffraction
Bevilaqua, William Lemos; Epp, Jérémy; Meyer, Heiner; Dong, Juan; Roelofs, Hans; Rocha, Alexandre da Silva; Reguly, Afonso (2021) [Journal article]In this work, the microstructural evolution during the dynamic transformation of austenite to bainite was directly observed by in-situ high energy synchrotron X-ray diffraction measurements during warm uniaxial compression ... -
Surface processing to improve the fatigue strength of bainitic steels : an overview
Dalcin, Rafael Luciano; Hatwig, Rodrigo Afonso; Oliveira, Leonardo Fonseca; Zottis, Juliana; Rocha, Alexandre da Silva; Epp, Jérémy; Zoch, Hans-Werner (2019) [Journal article]Currently, one of the major challenges for automotive industries is to reduce the weight and energy consumption of vehicles by using stronger and advanced low-cost materials. Conventional solutions using quenched and ... -
Two-step continuous cooling heat treatment applied in a low carbon bainitic steel
Castro, Pedro José de; Silveira, Antonio Carlos de Figueiredo; Ivaniski, Thiago Marques; Turra, Cristiano José; Epp, Jérémy; Rocha, Alexandre da Silva (2021) [Journal article]Thermo-mechanical treatments using continuous cooling after forging are an established method for producing bainitic steels, mainly because of the elimination of energy intensive additional heat treatment processes. The ...