Loucif, Abdelhalim, Bitterlin, Matthieu, Jahazi, Mohammad, Tremblay, Rami, Morin, Jean-Benoît et Lapierre-Boire, Louis-Philippe.
2018.
« Determination of the root causes for cracking in a large-size cast ingot of AISI 4317 steel using microstructural analysis ».
Metallography, Microstructure, and Analysis, vol. 7, nº 2.
pp. 203-208.
Compte des citations dans Scopus : 4.
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Résumé
The objective of the present work is to study the root causes for the cracking and material detachment from the external surface of a 10 metric tons high-strength low-alloy steel ingot after solidification and annealing processes. Failure analysis investigations were conducted on different samples from the cracked areas as well as from non-cracked ones. A combination of optical and electron microscopies, x-ray diffraction, and microhardness techniques were used to study and analyze the nature, morphology, and composition of the different microstructural components in the cracked regions. Thermodynamic software, Thermo-Calc® was used to corroborate and interpret the experimental findings with the existing theories. The results indicated a strong intergranular character of the cracks accompanied by the presence of second-phase particles at prior austenite grain boundaries. Segregation of chromium and manganese was demonstrated through local chemical analysis of the grain boundaries. It was concluded that a rapid cooling rate combined with the weakening of grain boundaries was at the origin of crack initiation.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Jahazi, Mohammad |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 04 juill. 2018 12:42 |
| Dernière modification: | 13 avr. 2023 16:08 |
| URI: | https://espace2.etsmtl.ca/id/eprint/16794 |
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