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Phaneesh, K. R.
- Effect of the Cooling Condition and Corresponding Microstructure on Tensile and Impact Behaviour of Low Carbon Steel (EN8)
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Authors
Affiliations
1 Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054, India., IN
2 Aircraft Research and Design Centre HAL, Bengaluru, Karnataka 560037, India., IN
3 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103, India., IN
1 Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054, India., IN
2 Aircraft Research and Design Centre HAL, Bengaluru, Karnataka 560037, India., IN
3 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103, India., IN
Source
Journal of Mines, Metals and Fuels, Vol 71, No 1 (2023), Pagination: 51-56Abstract
Steels benefit significantly from the heat treatment and quenching procedure because it modifies mechanical characteristics and affects phase change in the structure. To test EN8 steels, we execute this heat treatment procedure in a variety of quenching media. A few EN8 steel specimens were investigated and evaluated after being heated in the resistance furnace between 760°C and 950°C and then quenched in a different media. As diverse quenching mediums, oil, water, and air are employed. Mechanical characteristics such as hardness using Vickers hardness equipment and the quenched samples hardness were substantially more prominent than the base material. Followed by Charpy impact test is carried out on the samples according to ASTM E-23 and the Vickers hardness test according to ASTM-E92. In the present work, medium carbon steel (EN8) was used, and its composition is shown in the table below. The samples are prepared in 20mm cylindrical bars, which were then machined to final dimensions of 10x10x75 mm 3 on a lathe as per the ASTM-E23 and v - cut notch of 2 mm depth the center for impact testing. Tensile testing was conducted using an ASTM-E2 compliant servo-hydraulic machine with a 100 kN load cell. A clip-on extensometer and the result recorded for ultimate tensile strength, increase with fine grains.Keywords
Heat Treatment, Critical Cooling Temperature, Cooling Medium, and Microstructure Examination.
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- Grain Growth Inhibition by Second Phase Particles : A Two-Dimensional Monte Carlo Computational Study
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Authors
Affiliations
1 Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054, India., IN
2 Aircraft Research and Design Centre HAL, Bengaluru, Karnataka 560037, India., IN
3 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103, India., IN
1 Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054, India., IN
2 Aircraft Research and Design Centre HAL, Bengaluru, Karnataka 560037, India., IN
3 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103, India., IN
Source
Journal of Mines, Metals and Fuels, Vol 70, No 10A (2022), Pagination: 101-107Abstract
A comprehensive 2-D simulation was performed on a square lattice under the influence of a second phase particle to validate the Zener limit. The effect of matrix sizes from 100 to 10,000 was examined on R(lim), R(max), Scaling constant(k), and impurities lying on the grain boundaries(ϕ). In addition, the optimum matrix size N=2000 under various second phase particles and Q states were investigated. The particle-pinned regimes developed a unique relationship between the Zener limit and the fraction of second phase particles resting on the grain boundary, i.e., R(limit)=1/eΦ It was observed that the particle fraction is proportional to the determined limiting grain size. The homogeneity and distribution of grains were observed to obey the lognormal behavior.
Keywords
Q-States, Second Phase Particles, Matrix Size, Grain Size Distribution, Zener Limit, and Scaling Constant.References
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