Kinetic Study of the Growth of Hard Layers on a Low Carbon Steel

MRS Advances ◽  
2017 ◽  
Vol 2 (50) ◽  
pp. 2809-2817
Author(s):  
Daniel S. Huerta ◽  
E.D. García Bustos ◽  
D.V. Melo Máximo ◽  
M. Flores Martinez
Keyword(s):  
Carbon Steel ◽  
Treatment Time ◽  
Low Carbon Steel ◽  
Thermochemical Treatment ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Kinetic Growth ◽  
Steel Aisi ◽  
Growth Constants ◽  
Substrate Hardness

ABSTRACTIn the present work the kinetic growth is analyzed for a hard coating applied on a low carbon steel AISI 8620. A thermochemical treatment of bored with dehydrated paste at temperatures of 900, 950 and 1000 °C with a residence time of 2, 4, 6 and 8 h. The morphology and types of borides formed on the surface of the steel were evaluated by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The layer formed has a size of 20 to 113 μm which will be dependent on the process temperature, the treatment time and the alloy elements of the substrate. Hardness of 1493-1852 HV are presented for treatment times and temperatures established in this study. The kinetics of growth were determined and analyzed using a mathematical model of diffusion, evaluating the penetration of the biphasic layer that is determined as a function of the time and temperature of the thermochemical treatment (TCT). The results show the increase in the growth constants (k) with respect to the bored temperatures. The activity energy (Q) of the material AISI 8620 was also obtained.

scholarly journals Dislocation densities in a low-carbon steel during martensite transformation determined by in situ high energy X-Ray diffraction

2021 ◽  
Vol 800 ◽  
pp. 140249
Author(s):  
Juan Macchi ◽  
Steve Gaudez ◽  
Guillaume Geandier ◽  
Julien Teixeira ◽  
Sabine Denis ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Martensite Transformation ◽  
Low Carbon Steel ◽  
High Energy ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dislocation Densities

The transformation of corrosion products on 0Cu2Cr carbon steel in the marine

2021 ◽  
Vol 68 (5) ◽  
pp. 457-463
Author(s):  
Hongyu Liu ◽  
Yingxue Teng ◽  
Jing Guo ◽  
Qinghe Xiao ◽  
Miao Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Energy Dispersive Spectrometer ◽  
Low Carbon Steel ◽  
Transformation Process ◽  
Corrosion Products ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Transformation Mechanism ◽  
Content Type ◽  
Marine Engineering

Purpose This paper aims to explore the transformation process and transformation mechanism of carbon steel under the marine environment. Design/methodology/approach In this paper, the transformation and rust layers corrosion products on 0Cu2Cr carbon steel with different cycles coupon test was investigated and deeply explored by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction. Findings The results showed that the thickness of rust layers grew from 71.83 µm to 533.7 µm with increasing duration of corrosion. The initial corrosion product was γ-FeOOH, then part of the γ-FeOOH continued growing, and under the capillary action, the other part of the γ-FeOOH transformed to α-FeOOH. Originality/value To the best of the authors’ knowledge, this paper puts forward for the first time a new viewpoint of the development of corrosion products of low-carbon steel in two ways. This discovery provides a new idea for the future development of steel for marine engineering.

Influence of Iron Bacteria on the Corrosion Behavior of Carbon Steel: SEM Study

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
E. Hamzah ◽  
C. L. Khohr ◽  
Ahmad Abdolahi ◽  
Z. Ibrahim
Keyword(s):  
Carbon Steel ◽  
Cooling Water ◽  
Low Carbon Steel ◽  
Iron Hydroxides ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
X Ray ◽  
Iron Bacteria ◽  
Microbially Influenced Corrosion ◽  
Sem Study

In this work, the iron bacteria were cultured and inoculated into the cooling water before immersion, and low carbon steel coupons were immersed for one month. Then, microbially influenced corrosion (MIC) of carbon steel in the presence of these bacteria was investigated using scanning electron microscopy (SEM), x-ray diffraction spectroscopy (XRD) and weight loss methods. SEM results showed that large amounts of corrosion products and heterogeneous biofilm layer were formed on the coupon surface. SEM also revealed the uniform-pitting corrosion on the steel surface due to bacteria colonization. XRD results show that the main constituents present in corrosion product are composed of iron oxides and iron hydroxides. 

Brittle Fracture Generated by Abrasion Wear in Borided Low Carbon Steel

2005 ◽  
Author(s):  
Marti´n Castillo ◽  
Manuel Vite ◽  
L. H. Herna´ndez ◽  
G. Villa ◽  
G. Urriolagoitia
Keyword(s):  
Carbon Steel ◽  
Brittle Fracture ◽  
Low Carbon Steel ◽  
Particle Morphology ◽  
Principal Characteristic ◽  
Low Carbon ◽  
Abrasive Particles ◽  
Hard Particles ◽  
Abrasion Wear ◽  
Steel Aisi

This work is related to failure as a consequence of brittle fracture by abrasion wear. The experimental evidence showed that this situation depends on the size and shape of the abrasive particles and their velocity when they are interacting against the abraded surface. The particle morphology determines the type of failure, in which the crack may propagate. This can be in a lateral and radial direction. Also this situation is observed in low carbon steel (AISI 8620) which has been borided previously. In accordance with the results, the strength is improved by: developing phases, varying thickness of the borided layer and increasing the hardness. At the same time, a hardness analysis of the borided steel and the abrasive surfaces was carried out. The hardness is the principal characteristic which increases the abrasion resistance and the borided improved resistant to wear. However, it has different behaviour according to the type mechanism of abrasion wear (two or three bodies). In the case of three bodies, it is necessary to take into account the superficial characteristic, because over rough surfaces, the hard particles deteriorate the surface of the specimen. On the other hand, on smooth borided surfaces, generally the particles slip without several damage.

AISI 1118

Alloy Digest ◽  
1982 ◽  
Vol 31 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Coarse Grain ◽  
Low Carbon ◽  
High Manganese ◽  
Steel Mills ◽  
Steel Aisi ◽  
Machining Characteristics

Abstract AISI 1118 is a low carbon steel containing relatively high manganese and sulfur to provide free-machining characteristics. It is resulfurized coarse-grain type of steel. AISI 1118 is commonly used to produce carbunized components and parts but can be used without carburizing for some applications that do not require a hard surface. Among its many uses are bushings, gears, pins, shafts, and nuts and bolts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-91. Producer or source: Carbon steel mills. See also Alloy Digest CS-55, August 1974.

Experimental Study of the Effect of Siliconizing Parameters of Thermochemical Treatment of low Carbon Steel

Silicon ◽  
2016 ◽  
Vol 8 (2) ◽  
pp. 201-210 ◽  
Author(s):  
A. P. I. Popoola ◽  
V. S. Aigbodion ◽  
O. S. I. Fayomi ◽  
M. Abdulwahab
Keyword(s):  
Experimental Study ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Thermochemical Treatment ◽  
Low Carbon

scholarly journals Effect of Ultrasonic Peening on Impact Strength of Low Carbon Steel AISI 1020

2019 ◽  
Vol 54 (6) ◽  
Author(s):  
Jenan Mohammed Naje ◽  
Nidaa Hameed Dawood ◽  
Sara Saad Ghazi
Keyword(s):  
Residual Stress ◽  
Carbon Steel ◽  
Impact Strength ◽  
Residual Stresses ◽  
Base Metal ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ultrasonic Peening ◽  
Steel Aisi ◽  
The Impact

This paper explores the effect of ultrasonic peening using various passes on an impact strength of AISI 1020 low carbon steel. Many ASTM E23 impact specimens were prepared from the chosen metal and exposed to multi-pass ultrasonic peening (1,2,3 pass). Microstructure, hardness, residual stresses, and impact tests on ultrasonic peened and not peened samples were performed. Ultrasonic peening contributed to increasing the impact strength, due to the increase in comparative residual stress and hardness. Three passes show improvement in strength by (29.7%), comparative with the base metal.

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