Mechanical Properties and Cracking Behavior of High-Temperature Heat-Exchanger Materials
Document Type
Conference Proceeding
Publication Date
2005
Publication Title
2005 ASME Pressure Vessels and Piping Conference
Publisher
American Society of Mechanical Engineers
First page number:
709
Last page number:
715
Abstract
The structural materials selected for high-temperature heat-exchanger applications are expected to withstand very severe operating conditions including elevated temperatures and aggressive chemical species during hydrogen generation using nuclear power. Three different cycles namely sulfur-iodine, calcium-bromine and high temperature electrolysis have been identified for hydrogen generation. Three different structural materials namely Alloy C-22, Alloy C-276 and Waspaloy have been tested to evaluate their high-temperature tensile properties and stress corrosion cracking (SCC) resistance in an acidic solution. The data indicate that all three alloys are capable of maintaining appreciably high tensile strength upto a temperature of 600°C. The results of SCC testing indicate that all three materials are highly resistant to cracking in an acidic solution retaining much of their ductility and time to failure in the tested environment. Fractographic evaluation by scanning electron microscopy revealed dimple microstructure indicating significant ductility in all three alloys.
Keywords
Alloys – Fracture; Alloys – Mechanical properties; Fracture (Process); Heat exchangers – Materials; High temperatures; Hydrogen as fuel; Mechanical properties; Nuclear energy; Strains and stresses; Stress corrosion
Disciplines
Materials Science and Engineering | Mechanical Engineering | Mechanics of Materials | Metallurgy | Oil, Gas, and Energy | Sustainability
Language
English
Permissions
Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited
Repository Citation
Roy, A. K.,
Savalia, L.,
Kothapalli, N.
(2005).
Mechanical Properties and Cracking Behavior of High-Temperature Heat-Exchanger Materials.
2005 ASME Pressure Vessels and Piping Conference
709-715.
American Society of Mechanical Engineers.