Comparison of british and overseas standards for steel. Chemical composition of wrought carbon steels: British standard (S.A.E and AISI) and German (DIN and Werkstoff)

2015 ◽  
Keyword(s):  
Chemical Composition ◽  
Carbon Steels ◽  
British Standard

Prediction of hot flow curves of construction steels by physically-based constitutive equations

2012 ◽  
Vol 1485 ◽  
pp. 1-8
Author(s):  
G. Varela-Castro ◽  
J.M. Cabrera
Keyword(s):  
Chemical Composition ◽  
Constitutive Equations ◽  
Constitutive Expression ◽  
Carbon Steels ◽  
Compression Technique ◽  
Gamma Iron ◽  
Exponential Factor ◽  
Self Diffusion ◽  
Diffusion Parameters ◽  
Physically Based

ABSTRACTThe development of accurate constitutive equations is important for the success of computer simulations of high temperature forming operations. Often, these simulations must be made on alloys that have not been completely characterized. For that reason physically-based constitutive equations taking the chemical composition into consideration, involving deformation mechanisms and characteristic properties of the material are necessary. The influence that exerts the solute elements to an alloy on the mechanisms of diffusion on deformation processes at high temperatures is not an easy subject and the available information in literature is scarce.This study examines that influence working on the basis of eight structural plain carbon steels with the chemical composition ranging between 0.15-0.45%C, 0.2-0.4%Si and 0.6-1.6%Mn produced by Electro-Slag Remelting ESR process and tested by isothermal uniaxial compression technique. The studied deformation conditions include strain rates ranging between 5·10−4 to 1·10−1 s−1 and temperatures between 0.6-0.75Tm, with Tm the melting temperature.A constitutive expression for the hot working behavior is proposed, it includes the variation of the diffusion parameters with the chemical composition. To such aim the effect of the chemical composition of the alloy on the pre-exponential factor D0 of the gamma iron self-diffusion coefficient Dsd is included. Finally, a comparison of the experimental and predicted results shows the good agreement of the model with experimental flow data.

Hydrogen effects on fracture of high-strength steels with different micro-alloying

2015 ◽  
Vol 33 (6) ◽  
pp. 515-527 ◽  
Author(s):  
Olga Todoshchenko ◽  
Yuriy Yagodzinskyy ◽  
Valentina Yagodzinska ◽  
Tapio Saukkonen ◽  
Hannu Hänninen
Keyword(s):  
Chemical Composition ◽  
Electron Backscatter Diffraction ◽  
High Strength Steels ◽  
Thermal Desorption Spectroscopy ◽  
High Strength ◽  
Constant Load ◽  
Carbon Steels ◽  
Hydrogen Induced Cracking ◽  
Load Tests ◽  
Backscatter Diffraction

AbstractConstant load tests of high-strength carbon steels with different micro-alloying using strengths in the range of 1000–1400 MPa were performed at ambient temperature under continuous electrochemical hydrogen charging. Hydrogen markedly affects delayed fracture of all the studied steels. Fractography of the studied steels shows that fracture mechanism depends on the chemical composition of the studied steels and hydrogen-induced cracking exhibits intergranular or transgranular character occurring often in the form of hydrogen flakes. The size and chemical composition of non-metallic inclusions are analyzed by scanning electron microscopy and energy-dispersive X-ray spectroscopy. Hydrogen-induced cracking initiates at TiN/TiC particles in steels with Ti alloying. Crack paths are studied with electron backscatter diffraction mapping to analyze crack initiation and growth. The thermal desorption spectroscopy method is used to analyze the distribution of hydrogen in the trapping sites. The mechanisms of hydrogen effects on fracture of high-strength steels are discussed.

Choice of electrolytic polishing mode for carbon steels

2020 ◽  
pp. 231-233
Author(s):  
M.P. Baryshnikov ◽  
A.S. Ishimov ◽  
E.V. Lopatina ◽  
L.V. Nosov ◽  
I.E. Znikin
Keyword(s):  
Chemical Composition ◽  
Carbon Steels ◽  
High Quality ◽  
Electrolytic Polishing ◽  
Steel 20 ◽  
Quality Surface ◽  
High Quality Surface

The electrolytic polishing modes of carbon steels on example steel 20 on the installation LectroPol-5 using electrolyte of chemical composition of 90 % C4H100 and 10 % HClO4 are studied. Electrolytic polishing provides high-quality surface for metallografi c analysis.

Study of the critical deformation dependence for dynamic recrystallization in low-carbon steels on the chemical composition

2020 ◽  
pp. 74-79
Author(s):  
V.N. Gadalov ◽  
V.V. Shkatov ◽  
Yu. V. Skripkina ◽  
A.E. Gvozdev
Keyword(s):  
Chemical Composition ◽  
Dynamic Recrystallization ◽  
Chemical Elements ◽  
Carbon Steels ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
Automated Control ◽  
Critical Deformation ◽  
Alloy Steels ◽  
Improved Model

The article considers dependence of the critical deformation for dynamic recrystallization in low-alloy steels on the chemical composition. The article shows an improved model for forecasting the critical deformation for dynamic recrystallization, which allows considering the content of chemical elements in steel. The article analyzes the influence of the chemical composition of low-alloy steels on the value of critical deformation during hot deformation. The article shows that the developed mathematical model can be used in the system of automated control of the structure and properties of steels during hot rolling to forecast conditions for the development of dynamic recrystallization and to select the optimal chemical composition of steels.

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