Correlation between microstructure and intergranular corrosion behavior of low delta-ferrite content AISI 316L aged in the range 550e700 C
dc.contributor.author
hal.structure.identifier | BEN RHOUMA, A
|
dc.contributor.author | AMADOU, Tidiane |
dc.contributor.author
hal.structure.identifier | SIDHOM, Habib
|
dc.contributor.author
hal.structure.identifier | BRAHAM, Chedly
|
dc.date.accessioned | 2017 |
dc.date.available | 2017 |
dc.date.issued | 2017 |
dc.date.submitted | 2017 |
dc.identifier.issn | 0925-8388 |
dc.identifier.uri | http://hdl.handle.net/10985/12176 |
dc.description.abstract | The microstructure and the phase identification of austenitic stainless steel AISI 316L with low δ-ferrite content (δ ≤ 1%) and aged for up to 80 000 h at temperatures ranging from 550 to 700 °C were investigated by using an optical microscope (OM), a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Local changes of chromium content, resulting from nucleation and growth of chromium-rich phases during aging, were quantitatively assessed by energy dispersive X-ray spectroscopy (EDX) in the scanning transmission electron microscope (STEM). The intergranular corrosion behavior (IGC) of annealed and aged specimens was evaluated using the double loop electrochemical potentiokinetic reactivation (DL-EPR) and completed by IGC morphologies according to the ASTM A262 practice A standard. The results showed that δ-ferrite decomposed gradually into M23C6 at 550 °C and decomposed totally into intermetallic phases (σ, η, χ, and R) and into secondary austenite (γr) at temperatures equal to or higher than 650 °C. Similarly γ-austenite decomposed into M23C6 carbide at 550 °C and into intermetallic phases such as η and σ in addition to carbide, at higher temperatures. The time-temperature-sensitization diagram (TTS) was established and used to calculate the critical cooling rate (CCR) that prevents IGC sensitization. The analysis of IGC results leads to the conclusion that sensitization-desensitization is still controlled by the characteristics of chromium-depleted area surrounding austenite grain boundary regions. No significant effect of remained δ-ferrite and derived components on the corrosion behavior of AISI 316 L containing 1% of δ-ferrite. |
dc.language.iso | en |
dc.publisher | Elsevier |
dc.rights | Post-print |
dc.subject | Austenitic stainless steel |
dc.subject | AISI 316L |
dc.subject | ICG |
dc.subject | Aging |
dc.subject | Sensitization |
dc.subject | Microstructure |
dc.title | Correlation between microstructure and intergranular corrosion behavior of low delta-ferrite content AISI 316L aged in the range 550e700 C |
dc.identifier.doi | 10.1016/j.jallcom.2017.02.273 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Sciences de l'ingénieur: Matériaux |
dc.subject.hal | Sciences de l'ingénieur: Mécanique |
ensam.audience | Internationale |
ensam.page | 871-886 |
ensam.journal | Journal of Alloys and Compounds |
ensam.volume | 708 |
ensam.peerReviewing | Oui |
hal.identifier | hal-01638576 |
hal.version | 1 |
hal.submission.permitted | updateFiles |
hal.status | accept |