TY - JOUR
T1 - Failure analysis of HP40 steel tubes utilized in steam reformer units of petroleum refinery plants
AU - Perez-Badillo, Eduardo
AU - Sigala-Garcia, Dario A.
AU - Rivas-Lopez, Diego
AU - Dorantes-Rosales, Héctor J.
AU - Gonzalez-Velazquez, Jorge L.
AU - Saucedo-Muñoz, Maribel L.
AU - Lopez-Hirata, Victor M.
N1 - Publisher Copyright:
© 2020 Universidade Federal de Sao Carlos. All rights reserved.
PY - 2020
Y1 - 2020
N2 - This work is focused on the failure analysis of a HP40 steel tube used in steam reformer units, which was operated at about 850 °C for 100000 h. The failure analysis was conducted experimentally and numerically using the Thermo-Calc software. The main results indicated that the failed tube presented slightly different contents of Ni and Cr from the nominal ones, which originated the absence of the interdendritic eutectic microconstituent, composed of austenite and M7C3 carbides. This fact was also corroborated by Thermo-Calc results. This absence of eutectic facilitates the crack propagation on the dendritic zones and then the trangranular brittle fracture propagation through the austenite dendritic zones.
AB - This work is focused on the failure analysis of a HP40 steel tube used in steam reformer units, which was operated at about 850 °C for 100000 h. The failure analysis was conducted experimentally and numerically using the Thermo-Calc software. The main results indicated that the failed tube presented slightly different contents of Ni and Cr from the nominal ones, which originated the absence of the interdendritic eutectic microconstituent, composed of austenite and M7C3 carbides. This fact was also corroborated by Thermo-Calc results. This absence of eutectic facilitates the crack propagation on the dendritic zones and then the trangranular brittle fracture propagation through the austenite dendritic zones.
KW - As-Cast HP40 steel
KW - Failure
KW - Microstructure
KW - Tubes
UR - http://www.scopus.com/inward/record.url?scp=85092604842&partnerID=8YFLogxK
U2 - 10.1590/1980-5373-MR-2019-0698
DO - 10.1590/1980-5373-MR-2019-0698
M3 - Artículo
AN - SCOPUS:85092604842
SN - 1516-1439
VL - 23
JO - Materials Research
JF - Materials Research
IS - 3
M1 - e20190698
ER -