The relationship between brittle fracture and the high strain fatigue behaviour of a low carbon steel

In the paper, the relationship between the grain size and fatigue life are studied. To specify the initial and short crack propagation life of low carbon steel material, three methods are used in the simulation. At first, the K. Tanaka’s model is introduced to calculate the fatigue life of a grain. Then, the Voronoi Diagram is used to generate the microstructure of grains. At last, a criteria to specify the short crack is proposed. Based on these methods, the numerical simulation is conducted. With the help of the process, the grain sizes are generated randomly in order to specify how grain sizes effect fatigue life. The computational results are in good agreement with the experimental data. The results show that the randomness of fatigue life is closely related to the randomness of grain sizes.

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BRITTLE FRACTURE IN LOW-CARBON STEEL UNDER TENSILE AND TORSION TEST

Experimental Mechanics ◽

10.1016/b978-0-08-013346-1.50024-0 ◽

1963 ◽

pp. 353-370 ◽

Cited By ~ 2

Author(s):

TAKEO YOKOBORI ◽

AKIO OTSUKA

Keyword(s):

Carbon Steel ◽

Brittle Fracture ◽

Low Carbon Steel ◽

Torsion Test ◽

Low Carbon

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Fatigue behaviour of dissimilar friction stir spot welds between A6061-T6 and low carbon steel sheets welded by a scroll grooved tool without probe

Fatigue & Fracture of Engineering Materials & Structures ◽

10.1111/j.1460-2695.2010.01549.x ◽

2011 ◽

Vol 34 (8) ◽

pp. 581-591 ◽

Cited By ~ 17

Author(s):

Y. UEMATSU ◽

K. TOKAJI ◽

Y. TOZAKI ◽

Y. NAKASHIMA ◽

T. SHIMIZU

Keyword(s):

Carbon Steel ◽

Low Carbon Steel ◽

Fatigue Behaviour ◽

Low Carbon ◽

Spot Welds ◽

Friction Stir ◽

Steel Sheets

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Brittle Fracture Generated by Abrasion Wear in Borided Low Carbon Steel

World Tribology Congress III, Volume 1 ◽

10.1115/wtc2005-63869 ◽

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.

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