TY - JOUR
T1 - Numerical evaluation of scratch tests on boride layers
AU - Meneses-Amador, A.
AU - Jiménez-Tinoco, L. F.
AU - Reséndiz-Calderon, C. D.
AU - Mouftiez, A.
AU - Rodríguez-Castro, G. A.
AU - Campos-Silva, I.
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/12/25
Y1 - 2015/12/25
N2 - An experimental and numerical study of the scratch test on FeB/Fe2B bilayers is presented. The boride layers were formed at the surface of AISI 304 steels by developing the powder-pack boriding process at temperatures of 1223K for 2, 6 and 10h of exposure times. From the set of experimental conditions of the boriding process, scratch tests were performed with a linearly-increasing load mode of 1 to 90N on 7mm in length to determinate the most effective and informative testing conditions and to estimate the critical load (Lc) at which the boride layer fails. The damage in the boride layer was examined by high resolution SEM. Experiments tests indicated that at a critical load the boride layer fails through brittle fracture. Numerical calculations considering the residual stress field generated by the scratch load showed that at this load the tensile stresses inside the boride layer become large enough to cause brittle failure. The residual stress fields generated by the scratch load were analyzed and related with the failure mechanisms observed by the experimental tests.
AB - An experimental and numerical study of the scratch test on FeB/Fe2B bilayers is presented. The boride layers were formed at the surface of AISI 304 steels by developing the powder-pack boriding process at temperatures of 1223K for 2, 6 and 10h of exposure times. From the set of experimental conditions of the boriding process, scratch tests were performed with a linearly-increasing load mode of 1 to 90N on 7mm in length to determinate the most effective and informative testing conditions and to estimate the critical load (Lc) at which the boride layer fails. The damage in the boride layer was examined by high resolution SEM. Experiments tests indicated that at a critical load the boride layer fails through brittle fracture. Numerical calculations considering the residual stress field generated by the scratch load showed that at this load the tensile stresses inside the boride layer become large enough to cause brittle failure. The residual stress fields generated by the scratch load were analyzed and related with the failure mechanisms observed by the experimental tests.
KW - Boriding
KW - Finite element method
KW - Scratch test
UR - http://www.scopus.com/inward/record.url?scp=84958750748&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2015.06.088
DO - 10.1016/j.surfcoat.2015.06.088
M3 - Artículo
SN - 0257-8972
VL - 284
SP - 182
EP - 191
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -