Possibility of predetermining the distribution of residual stresses in borided steels

Lyakhovich, L. S.; Kosachevskii, L. N.; Kulik, A. Ya.; Сурков, В. В.; Turov, Yu. V.

doi:10.1007/bf00722544

Cited by 2 publications

(2 citation statements)

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“…In this case, the apparent surface crack length is a reflection of both the fracture toughness of the phase and any preexisting residual stresses. The presence of compressive residual stresses in the hard coating decreases the surface crack length relative to the equilibrium length in the absence of residual stresses [7][8][9].…”

Section: Resultsmentioning

confidence: 99%

Fracture Indentation on AISI 1018 Borided Steels

Campos-Silva

Domı́nguez

Hernández-Sánchez

et al. 2010

KEM

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Fracture indentation was applied to estimate the fracture toughness of AISI 1018 borided steels. The Fe2B hard layers were formed using the powder-pack boriding process for two temperatures with 4 and 8 h of exposure times. The fracture toughness of the iron boride layer of the AISI 1018 borided steels was estimated using a Vickers microindentation induced-fracture testing at distances of 15 and 30 m from the surface, applying four loads (0.49, 0.98, 1.96 and 2.9 N). The microcracks generated at the corners of the Vickers microindentation were considered as experimental parameters, which are introduced in a Palmqvist crack model to determine their corresponding fracture toughness KC. As a result, the experimental parameters, such as exposure time and boriding temperature are compared with the resulting fracture toughness of the borided phase.

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Section: Resultsmentioning

confidence: 99%

Fracture Indentation on AISI 1018 Borided Steels

Campos-Silva

Domı́nguez

Hernández-Sánchez

et al. 2010

KEM

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“…In this case, the apparent surface crack length is a reflection of both the fracture toughness of the phase and any preexisting residual stresses. The presence of compressive residual stresses in the hard coating decrease the surface crack length relative to the equilibrium length in the absence of residual stresses [14][15][16].…”

Section: Resultsmentioning

confidence: 99%

Measurement of Fracture Toughness in AISI 1018 Borided Steels by Vickers Indentation

Campos-Silva

Perrusquia

Domı́nguez

et al. 2009

DDF

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This study evaluates the fracture toughness of Fe2B boride layers formed by the paste boriding thermochemical process on an AISI 1018 steel surface. The samples were placed in acrylic molds for the impregnation of boron carbide paste with thickness of 4mm over the sample surfaces to produce the diffusion into the steel. The aforementioned treatment considered one temperature, T= 1273 K, and three exposure times t=5, 6 and 8 h. Later, the borided samples were prepared metallographically to determine the mean values of the layer thicknesses and to produce Vickers microindentations at 45 m from the surface, applying four loads (1.9, 2.9, 4.9 and 9.8 N). The microcracks generated at the corners of the Vickers microindentation were considered as experimental parameters, which are introduced into two Palmqvist cracks models to determine their corresponding fracture toughness KC. As a result, the experimental parameters, such as exposure time and applied load are compared with the resulting fracture toughness of the borided phase.

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Possibility of predetermining the distribution of residual stresses in borided steels

Cited by 2 publications

References 0 publications

Fracture Indentation on AISI 1018 Borided Steels

Fracture Indentation on AISI 1018 Borided Steels

Measurement of Fracture Toughness in AISI 1018 Borided Steels by Vickers Indentation

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