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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pan American Materials Congress: Materials for Oil and Gas Industry
Presentation Title A Study on the Mechanisms Responsible for Dynamic Strain Aging Phenomenon in Inconel 718 Superalloy
Author(s) Monica Costa Rezende, Sinara Gabriel, Leonardo Ara˙jo, Jean Dille, Luiz Henrique de Almeida
On-Site Speaker (Planned) Monica Costa Rezende
Abstract Scope It is known that Inconel 718 presents dynamic strain aging (DSA) manifestation, which results in strength increase and ductility decrease. Understanding this phenomenon in Inconel 718 is quite complex, once more than one atomic species is involved and various mechanisms are proposed in literature. In this context, the objective of this study was to investigate the mechanisms responsible for DSA in Inconel 718. Material was subjected to heat treatments to obtain solution annealed and aging conditions. Tensile tests under vacuum were conducted at 200-950░C and strain rate 3.2 x 10-3 to 3.2 x 10-5 s-1. Microstructural analyzes and fractografy were performed on SEM and TEM. The mechanisms responsible for this phenomenon were identified and explained in accordance with initial microstructure and temperature range. The determination of the mechanisms considered competitive phenomena, such as intergranular oxidation (OAIC) and dynamic precipitation, which are also thermally activated and then affect directly DSA manifestation.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Study on the Mechanisms Responsible for Dynamic Strain Aging Phenomenon in Inconel 718 Superalloy
Adsorption of Organosulfur Compounds on Doped Boron Nitride Nanostructures
Design and Thermo-mechanical Processing of Steel Grade APIX70 PSL2 for Use in Line-pipe at Oil&Gas Industry
Dynamic Transformation and Retransformation during the Simulated Plate Rolling of an X70 Pipeline Steel
Effect of Heat Input on the Microstructure and Toughness of Welded API Pipelines
Evaluation of Non-Destructive Techniques (Thermography, Ultrasound and Eddy Current) for Detection of Failures in Metallic Substrates with Composite Anticorrosive Coatings
High Temperature In-Situ X-ray Analysis of a Lean Duplex Stainless Steel
Materials for Facilities Liquefied Petroleum Gas as NFPA
PAN-27: Blends of PVDF with Its Processing Waste: Study of the Mechanical Properties of the Blends Thermally Aged
Structural Integrity of Pipelines
The Corrosion Behavior of Newly Developed API X120 Pipeline Steel in H2S and Moderate Temperature Environments

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