Characterization of SAE 52100 bearing steel for finite element simulation of through-hardening process /

Download
index.pdf
2014
Müştak, Ozan
Show full item record
275
views
226
downloads
Through hardening is probably the most important heat treatment process for bearings as final geometrical and material characteristics of the final component are mainly determined in this step. Finite element simulation of heat treatment processes is stand out as a qualified solution for prediction of final properties of component due to advantages e.g. cost and time savings, over real-time furnace experiments. Heat treatment simulation needs accurately extracted material property database including thermo-physical and thermo-mechanical properties of the all phases as a function of temperature. However, only a fraction of these data are available for 100Cr6 (SAE 52100). The present study aimed to the determination of thermo-mechanical and thermo-metallurgical properties of 100Cr6 bearing steel, which are necessary for through hardening simulation, by using a combination of experimental and computational methods. Briefly, the study includes experimental determination of temperature dependent physical properties (e.g. thermal expansion coefficient), temperature dependent mechanical properties (e.g. flow curves, yield strengths, transformation strains, thermal strains), phase transformation kinetics, (e.g. TTT/CCT diagrams), critical temperatures (Ms, Mf, Bs, Ac1 and Ac3) and investigating the effect of stress on phase transformation. Thermal conductivity, heat capacity, elastic modulus, Poisson’s ratio, enthalpy and density values were calculated using physically based computational methods.
Steel, Bearing., Metals, Strain hardening., Steel, Finite element method.
http://etd.lib.metu.edu.tr/upload/12617985/index.pdf
https://hdl.handle.net/11511/24078
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Dynamic strain aging of dual phase steels in forming applications
Bayramin, Berkay; Efe, Mert; Department of Metallurgical and Materials Engineering (2017)
Sheet metals are subjected to certain temperatures (25-200oC) and strain rates (1-10 s-1) during forming applications. These thermomechanical conditions may cause dynamic strain aging (DSA) in various grades of steels including dual phase (DP) steels. DSA represent itself as serrations in the stress-strain curves. Two grades of DP steels (DP590 and DP800) were studied systematically at different strain rates (10-3s-1-1s-1) and temperatures (25oC-400oC) to investigate the DSA effects on the mechanical proper...
Characterization of ceramic pastes by an indentation hardness test
BRISCOE, BJ; Özkan, Necati (1997-01-01)
Certain material deformation properties of a typical alumina based ceramic paste system, including the hardness (a plastic yield characteristic), the elastic modulus, a plasticity index (a measure of the relative elastic-plastic response), and a mean flow stress, are obtained using an indentation hardness test. In order to compute these material properties a contact compliance procedure, in conjunction with an analysis based upon an adaptation of the Box-Cox curve fitting method for the compliance curve, ha...
Non-destructive evaluation of residual stresses in the multi-pass steel weldments
Erian, Gökhan; Gür, Cemil Hakan; Batıgün, Caner; Department of Metallurgical and Materials Engineering (2012)
The purpose of this thesis is non-destructive determination of residual stress state in the multi-pass welded steel plates by Magnetic Barkhausen Noise (MBN) technique. To control the effectiveness of the developed procedure, continuous MBN measurements on the heat affected zone and parent metal of the welded plates were performed. In the experimental part, various steel plates were welded with different number of weld passes. Various series of samples were prepared for residual stress and for angular defle...
Numerical analysis of thermo-mechanical behavior in flow forming
Günay, Enes; Fenercioglu, Tevfik Ozan; Yalçınkaya, Tuncay (2021-01-01)
Flow forming is a metal forming process for cylindrical workpieces where high velocity deformation leads to radial thinning and axial extension. In the current study, a thermomechanical, dynamic and explicit finite element model of a flow forming process is developed on ABAQUS software. The model is validated through the comparison of reaction forces and geometry obtained from the experiments. Coolant convection effect is analyzed in conjunction with roller and mandrel conduction cooling to study the therma...
Investigation on the ballistic performance of a dual phase steel against 7.62 mm AP projectile
Ubeyli, Mustafa; DEMİR, TEYFİK; Deniz, Hueseyin; Yıldırım, Raif Orhan; KELEŞ, Ömer (2010-03-25)
Dual phase steels have the potential to reduce the weight of structural components because of the improved mechanical properties obtained from the two phases: soft ferrite and hard martensite. In this study, the ballistic performance of a low carbon and low alloy steel was investigated in intercritically annealed conditions. To do this, intercritical heat treatments at three different temperatures were applied to the steel samples separately to get three groups of samples having various martensite volume fr...
Citation Formats
O. Müştak, “Characterization of SAE 52100 bearing steel for finite element simulation of through-hardening process /,” M.S. - Master of Science, Middle East Technical University, 2014.
METU IIS - Integrated Information Service open@metu.edu.tr