Oxidation Resistance of Additively Manufactured Inconel 718 for Gas Turbine Applications

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.

Creator: 

Barcelo Singh, Adria

Date: 

2020

Abstract: 

This research investigates the oxidation behaviours of an additively manufactured (AM) superalloy Inconel 718 and to compare its oxidation performance to that of wrought Inconel 718. A plasma arc additive manufacturing process was utilized to manufacture the AM samples. All samples were exposed at 800°C and 900°C. The oxidized samples were analysed using SEM and EDS. Both surface and cross-section microstructure were examined, in addition to microstructure changes in the substrate. The results showed the two alloys had similar weight changes up to 400 hours. The thickness of the chromia oxide scale formed on AM Inconel 718 was thinner than on the wrought samples. There was also more internal oxidation on the AM samples. In addition, the formation of a subscale Nb-rich layer was observed between outer chromia and substrate. Based on the preliminary results, it was concluded that the AM material had slightly inferior oxidation performance than wrought alloy.

Subject: 

Engineering - Mechanical
Materials Science
Engineering - Environmental

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Applied Science: 
M.App.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Engineering, Mechanical

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).