Tensile Properties and Corrosion Susceptibility of Alloy C-276 in S-I Environment

Authors

Ajit K. Roy, University of Nevada, Las VegasFollow
J. Pal, University of Nevada, Las VegasFollow

Document Type

Conference Proceeding

Publication Date

11-3-2005

Publication Title

2005 AIChE Annual Meeting and Fall Showcase

Publisher

American Institute of Chemical Engineers

First page number:

7942

Last page number:

7950

Abstract

The tensile properties of Alloy C 276, a leading candidate structural material for heat exchanger applications, have been determined at temperatures ranging from ambient to 600°C at a strain rate of 10-3 / sec. The results indicate that both the yield strength and ultimate tensile strength of this alloy were gradually reduced with increasing temperature, as expected. However, the ductility in terms of percentage elongation was reduced at 200 and 450°C. The results of stress corrosion cracking (SCC) tests involving this alloy in a simulated acidic solution, containing sulphuric acid & sodium iodide (S-I) revealed no failure at a constant load. SCC testing under a slow-strain-rate condition showed reduced failure stress at an elevated temperature, with insignificant variation in the ductility parameters. As to the general corrosion behavior, this alloy showed very little weight loss in a similar environment. The fractographic evaluation of the primary fracture surface of the tensile specimens revealed dimpled microstructures, indicating ductile failure.

Keywords

Alloys – Cracking; Alloys – Fatigue; Chromium alloys; Heat exchangers – Materials; Molybdenum alloys; Nickel alloys; Sodium iodide; Strains and stresses; Stress corrosion; Sulfuric acid

Disciplines

Heat Transfer, Combustion | Materials Science and Engineering | Mechanical Engineering | Mechanics of Materials | Metallurgy

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Roy, A. K., Pal, J. (2005). Tensile Properties and Corrosion Susceptibility of Alloy C-276 in S-I Environment. 2005 AIChE Annual Meeting and Fall Showcase 7942-7950. American Institute of Chemical Engineers.