TY - JOUR
T1 - Measurement of fracture toughness in AISI 1018 borided steels by vickers indentation
AU - Campos-Silva, I.
AU - López-Perrusquia, N.
AU - Ortiz-Domínguez, M.
AU - Figueroa-López, U.
AU - Hernández-Sánchez, E.
PY - 2008
Y1 - 2008
N2 - This study evaluates the fracture toughness of Fe2B boride layers formed by the paste bonding 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 bonded samples were prepared metallographically to determine the mean values of the layer thicknesses and to produce Vickers microindentations at 45 μm 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 bonded phase.
AB - This study evaluates the fracture toughness of Fe2B boride layers formed by the paste bonding 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 bonded samples were prepared metallographically to determine the mean values of the layer thicknesses and to produce Vickers microindentations at 45 μm 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 bonded phase.
KW - Boride layers
KW - Fracture toughness
KW - Microindentation
KW - Palmqvist cracks
KW - Paste boriding
UR - http://www.scopus.com/inward/record.url?scp=85044380547&partnerID=8YFLogxK
U2 - 10.4028/3-908454-50-6.675
DO - 10.4028/3-908454-50-6.675
M3 - Artículo
SN - 1012-0386
VL - 283-286
SP - 675
EP - 680
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
ER -