The Strength and Fracture Mechanism of Unalloyed Medium-Carbon Steel with Ultrafine-Grained Structure under Single Loads

Abstract Fatigue strength and fracture mechanism of a medium carbon steel with HVOF thermally sprayed WC-Co coatings were investigated under rotating bending. Two types of commercially available WC-Co powders were used, which have similar total chemical composition with different manufacturing processes. The fatigue strengths of the specimens with thick coatings were lower than that with thinner ones. Especially, it was found that the fatigue strengths of the thick coating specimens decreased more greatly than that of the grit blasted ones. Also, the morphology of the fatigue crack depended on the type of powders and the thickness of the coating. Futher more, an embedded Al2O3 grit and a crack generated during the grit blasting were found near the fatigue fracture origin of the coated substrate.

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Fatigue Behavior of Ultrafine-Grained Medium Carbon Steel with Different Carbide Morphologies Processed by High Pressure Torsion

Metals ◽

10.3390/met5020891 ◽

2015 ◽

Vol 5 (2) ◽

pp. 891-909 ◽

Cited By ~ 8

Author(s):

Christoph Ruffing ◽

Aaron Kobler ◽

Eglantine Courtois-Manara ◽

Robby Prang ◽

Christian Kübel ◽

...

Keyword(s):

High Pressure ◽

Carbon Steel ◽

High Pressure Torsion ◽

Fatigue Behavior ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Ultrafine Grained

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Nanoscale spheroidized cementite induced ultrahigh strength-ductility combination in innovatively processed ultrafine-grained low alloy medium-carbon steel

Scientific Reports ◽

10.1038/s41598-017-02920-9 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 11

Author(s):

N. Jia ◽

Y. F. Shen ◽

J. W. Liang ◽

X. W. Feng ◽

H. B. Wang ◽

...

Keyword(s):

Carbon Steel ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Ultrahigh Strength ◽

Ultrafine Grained

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The Strength-Ductility Balance of an Ultrafine-Grained Medium-Carbon Steel Produced by Severe Plastic Deformation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.727.211 ◽

2017 ◽

Vol 727 ◽

pp. 211-217

Author(s):

Jiang Li Ning ◽

Lu Huang ◽

Ya Tong Zhang

Keyword(s):

Carbon Steel ◽

Pure Iron ◽

High Pressure Torsion ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Ultrafine Grained ◽

Work Hardening Rate ◽

High Fraction ◽

Carbide Particles ◽

Positive Work

By processing with different high pressure torsion procedures, we obtained ultrafine-grained structures in medium-carbon steel and pure iron with different microstructural features. The UFG carbon steel exhibited a better balance of tensile strength and ductility in comparison with the UFG pure iron. The higher strength of the carbon steel is ascribed to the finer ferrite grain size, the dispersed carbide particles and the presence of alloying elements. The reasonable ductility of carbon steel is attributed to the maintaining of positive work hardening rate at high strain stage of tension, owing to the presence of intragranular particles and high fraction of high-angle boundaries.

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INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING ◽

10.32852/iqjfmme.vol18.iss1.78 ◽

2018 ◽

Vol 18 (1) ◽

pp. 125-135

Author(s):

Sattar H A Alfatlawi

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Surface Roughness ◽

Carbon Steel ◽

Cold Water ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Heating And Cooling ◽

Treatment Processes ◽

Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

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AISI 1025

Alloy Digest ◽

10.31399/asm.ad.cs0047 ◽

1972 ◽

Vol 21 (3) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Carbon Steel ◽

Physical Properties ◽

Heat Treating ◽

General Purpose ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Steel Mills ◽

Cold Worked

Abstract AISI 1025 is a low-to-medium-carbon steel used in the hot-worked, cold-worked, normalized or water-quenched-and-tempered condition for general-purpose construction and engineering. It is also used for case-hardened components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-47. Producer or source: Carbon and alloy steel mills.

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AISI 1551

Alloy Digest ◽

10.31399/asm.ad.cs0080 ◽

1980 ◽

Vol 29 (2) ◽

Keyword(s):

Carbon Steel ◽

Heat Treating ◽

Medium Carbon Steel ◽

High Manganese ◽

Hand Tools ◽

Medium Carbon ◽

Steel Mills ◽

Cold Worked ◽

Hot Rolled ◽

Good Workability

Abstract AISI 1551 is a medium-carbon steel containing relatively high manganese (0.85-1.15%) for a carbon steel. It can be used in the hot-rolled, annealed, normalized, cold-worked or liquid-quenched-and-tempered condition for numerous applications. It has a combination of good machinability and good workability. Its many uses include hand tools, machinery parts, springs and agricultural machinery. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-80. Producer or source: Carbon steel mills.

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