Role of Synthetic Slag Treatment on the Morphology of Non-Metallic Inclusions and Subsequent Cold Drawability of the High Carbon Wire Rod Steel

2021 ◽  
Author(s):  
Alok Srivastava ◽  
Ashok Kamaraj ◽  
Durbadal Mandal ◽  
K. Mondal ◽  
Gopi K. Mandal
Keyword(s):  
Synthetic Slag ◽  
High Carbon ◽  
Wire Rod ◽  
Slag Treatment ◽  
Metallic Inclusions

Development of Speciality Grade Wire by Controlling the Inclusions in High-Carbon Steel Using Synthetic Slag Treatment

2018 ◽  
Vol 72 (2) ◽  
pp. 369-381 ◽  
Author(s):  
G. K. Mandal ◽  
Ashok Kamaraj ◽  
M. M. Humane ◽  
R. K. Minj ◽  
S. K. Das ◽  
...  
Keyword(s):  
Carbon Steel ◽  
High Carbon Steel ◽  
Synthetic Slag ◽  
High Carbon ◽  
Slag Treatment

scholarly journals The role of faint population III supernovae in forming CEMP stars in ultra-faint dwarf galaxies

2021 ◽  
Author(s):  
Myoungwon Jeon ◽  
Volker Bromm ◽  
Gurtina Besla ◽  
Jinmi Yoon ◽  
Yumi Choi
Keyword(s):  
Milky Way ◽  
Dwarf Galaxies ◽  
Mass Resolution ◽  
Explosion Energy ◽  
High Carbon ◽  
Cosmological Simulations ◽  
Carbon Abundance ◽  
The Absolute ◽  
Zoom In

Abstract CEMP-no stars, a subset of carbon enhanced metal poor (CEMP) stars ($\rm [C/Fe]\ge 0.7$ and $\rm [Fe/H]\lesssim -1$) have been discovered in ultra-faint dwarf (UFD) galaxies, with Mvir ≈ 108 M⊙ and M* ≈ 103 − 104 M⊙ at z = 0, as well as in the halo of the Milky Way (MW). These CEMP-no stars are local fossils that may reflect the properties of the first (Pop III) and second (Pop II) generation of stars. However, cosmological simulations have struggled to reproduce the observed level of carbon enhancement of the known CEMP-no stars. Here we present new cosmological hydrodynamic zoom-in simulations of isolated UFDs that achieve a gas mass resolution of mgas ≈ 60 M⊙. We include enrichment from Pop III faint supernovae (SNe), with ESN = 0.6 × 1051 erg, to understand the origin of CEMP-no stars. We confirm that Pop III and Pop II stars are mainly responsible for the formation of CEMP and C-normal stars respectively. New to this study, we find that a majority of CEMP-no stars in the observed UFDs and the MW halo can be explained by Pop III SNe with normal explosion energy (ESN = 1.2 × 1051 erg) and Pop II enrichment, but faint SNe might also be needed to produce CEMP-no stars with $\rm [C/Fe]\gtrsim 2$, corresponding to the absolute carbon abundance of $\rm A(C)\gtrsim 6.0$. Furthermore, we find that while we create CEMP-no stars with high carbon ratio $\rm [C/Fe]\approx 3-4$, by adopting faint SNe, it is still challenging to reproduce CEMP-no stars with extreme level of carbon abundance of $\rm A(C)\approx 7.0-7.5$, observed both in the MW halo and UFDs.

Unraveling the Role of Zinc on Bimetallic Fe5C2–ZnO Catalysts for Highly Selective Carbon Dioxide Hydrogenation to High Carbon α-Olefins

ACS Catalysis ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2121-2133
Author(s):  
Chao Zhang ◽  
Chenxi Cao ◽  
Yulong Zhang ◽  
Xianglin Liu ◽  
Jing Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Carbon ◽  
Carbon Dioxide Hydrogenation

Recent Aspects on the Effect of Inclusion Characteristics on the Intragranular Ferrite Formation in Low Alloy Steels: A Review

2017 ◽  
Vol 36 (4) ◽  
pp. 309-325 ◽  
Author(s):  
Wangzhong Mu ◽  
Pär Göran Jönsson ◽  
Keiji Nakajima
Keyword(s):  
Heat Affected Zone ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
Intragranular Ferrite ◽  
Metallic Inclusions ◽  
Theoretical Investigations ◽  
Alloy Steels ◽  
Institute Of Technology ◽  
Future Work

AbstractIntragranular ferrite (IGF), which nucleates from specific inclusion surfaces in low alloy steels, is the desired microstructure to improve mechanical properties of steel such as the toughness. This microstructure is especially important in the coarse grain heat affected zone (CGHAZ) of weldments. The latest review paper focusing on the role of non-metallic inclusions in the IGF formation in steels has been reported by Sarma et al. in 2009 (ISIJ int., 49(2009), 1063–1074). In recent years, large amount of papers have been presented to investigate different issues of this topic. This paper mainly highlights the frontiers of experimental and theoretical investigations on the effects of inclusion characteristics, such as the composition, size distribution and number density, on the IGF formation in low carbon low-alloyed steels, undertaken by the group of Applied Process Metallurgy, KTH Royal Institute of Technology. Related results reported in previous studies are also introduced. Also, plausible future work regarding various items of IGF formation is mentioned in each section. This work aims to give a better control of improving the steel quality during casting and in the heat affected zone (HAZ) of weldment, according to the concept of oxide metallurgy.

scholarly journals The Direct Patenting of High Carbon Steel Wire Rod by Film Boiling

1975 ◽  
Vol 15 (8) ◽  
pp. 422-428 ◽  
Author(s):  
Keinosuke TAKEO ◽  
Kan-ichi MAEDA ◽  
Tadaoki KAMISE ◽  
Hitoshi IWATA ◽  
Yoshiaki SATOMI ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Wire ◽  
High Carbon Steel ◽  
Film Boiling ◽  
High Carbon ◽  
Wire Rod

scholarly journals Analysis on Key Production Control of High Carbon Wire Rod for Automotive Bead Wire

2020 ◽  
Vol 1653 ◽  
pp. 012027
Author(s):  
Cao Shuwei ◽  
Yang Xiaoqi ◽  
Du Yawei ◽  
Chen Zhanjie
Keyword(s):  
Production Control ◽  
High Carbon ◽  
Wire Rod

scholarly journals Revisiting the Psychology of Denial Concerning Low-Carbon Behaviors: From Moral Disengagement to Generating Social Change

2020 ◽  
Vol 12 (3) ◽  
pp. 935 ◽  
Author(s):  
Susanne Stoll-Kleemann ◽  
Tim O’Riordan
Keyword(s):  
Role Models ◽  
Moral Disengagement ◽  
Dominant Role ◽  
Low Carbon ◽  
High Carbon ◽  
New Findings ◽  
Climate Action ◽  
Climate Crisis ◽  
Behavioral Transformations

This paper reassesses the scope for shifting high-carbon personal behaviors in the light of prevailing insufficient political and regulatory action. Our previous research has shown that citizens regard such behavioral shifts as extremely daunting and create a number of psychological denial mechanisms that draw attention to the inaction of others, including governments. Further theoretical insights and relevant new findings have been attained from a more recent survey of more than 1000 German residents. This reveals that direct denial of anthropogenic climate change is replaced by a denial of responsibility for individual climate action. Ways of moral disengagement play a more dominant role, such as the diffusion and displacement of responsibility, although a majority is aware of—and very much concerned about—the climate crisis. More attention needs to be given for further reinterpretation of the role of moral disengagement to single out adequate strategies for different individuals and groups of people, such as making role models more visible to encourage social learning that could accelerate further necessary moral and behavioral transformations.

scholarly journals The role of grain-boundary cementite in bainite formation in high-carbon steels

2020 ◽  
Vol 185 ◽  
pp. 7-11 ◽  
Author(s):  
Ashwath M. Ravi ◽  
Jilt Sietsma ◽  
Maria J. Santofimia
Keyword(s):  
Grain Boundary ◽  
Carbon Steels ◽  
High Carbon
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