TY - JOUR
T1 - Fracture Toughness of Thick Boride Layers Estimated by the Cross-Sectioned Scratch Test
AU - Campos-Silva, I.
AU - Flores-Jiménez, M.
AU - Bravo-Bárcenas, D.
AU - Rodríguez-Castro, G.
AU - Martínez-Trinidad, J.
AU - Meneses-Amador, A.
N1 - Publisher Copyright:
© 2018, ASM International.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - New results about the fracture toughness (Kc) of thick boride layers estimated by the cross-sectioned scratch test are presented in this study. The FeB-Fe2B layers developed at the surface of borided AISI 1018 and AISI 1045 steels and the Fe2B layer formed on the borided AISI 1045 steel exposed to a diffusion annealing process (DAP) were used for this purpose. The cross-sectioned scratch tests were performed with a Vickers diamond stylus drawn across the thick boride layer under a constant load to produce a half-cone-shaped fracture near to the top surface of the borided steels. The height of the half-cone-shaped fracture as a function of the cross-sectioned scratch loads was used to determine the fracture toughness of the FeB and Fe2B layers. The results showed a fracture resistance of ∼2.8MPam for the FeB layer formed at the surface of borided AISI 1045 steel. Likewise, the effect of the DAP on the surface of the borided AISI 1045 steel promoted the formation of an exclusively Fe2B layer, with an increase in the fracture toughness of the whole boride layer around 5MPam. Finally, the principle of the technique can be used to minimize the influence of the anisotropic properties on the fracture toughness along the depth of boride layers.
AB - New results about the fracture toughness (Kc) of thick boride layers estimated by the cross-sectioned scratch test are presented in this study. The FeB-Fe2B layers developed at the surface of borided AISI 1018 and AISI 1045 steels and the Fe2B layer formed on the borided AISI 1045 steel exposed to a diffusion annealing process (DAP) were used for this purpose. The cross-sectioned scratch tests were performed with a Vickers diamond stylus drawn across the thick boride layer under a constant load to produce a half-cone-shaped fracture near to the top surface of the borided steels. The height of the half-cone-shaped fracture as a function of the cross-sectioned scratch loads was used to determine the fracture toughness of the FeB and Fe2B layers. The results showed a fracture resistance of ∼2.8MPam for the FeB layer formed at the surface of borided AISI 1045 steel. Likewise, the effect of the DAP on the surface of the borided AISI 1045 steel promoted the formation of an exclusively Fe2B layer, with an increase in the fracture toughness of the whole boride layer around 5MPam. Finally, the principle of the technique can be used to minimize the influence of the anisotropic properties on the fracture toughness along the depth of boride layers.
KW - boriding
KW - diffusion annealing process
KW - fracture toughness
KW - radial cracks
KW - scratch test
KW - thick layers
UR - http://www.scopus.com/inward/record.url?scp=85040687433&partnerID=8YFLogxK
U2 - 10.1007/s11665-018-3140-1
DO - 10.1007/s11665-018-3140-1
M3 - Artículo
SN - 1059-9495
VL - 27
SP - 510
EP - 516
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
IS - 2
ER -