Title

Tensile Deformation of Alloy-22 at Ambient and Elevated Temperatures

Document Type

Conference Proceeding

Publication Date

7-22-2008

Publication Title

ASME 2007 Conference Proceedings

Publisher

ASME

Volume

6

First page number:

391

Last page number:

394

Abstract

Significant efforts are in progress to identify and characterize the tensile properties of structural materials for application in hydrogen generation using a thermochemical process known as the sulfur-iodine cycle. Austenitic Alloy-22 has been evaluated for its tensile properties at temperatures ranging from ambient to 1000°C. As expected, the tensile strength was gradually decreased with increasing temperature due to the ease of plastic deformation at these temperatures. However, the failure strain gradually decreased from room temperature to 600°C, possibly due to the occurrence of a phenomenon known as dynamic strain aging. Transmission electron microscopy revealed maximum dislocation density at 600°C. Fractographic evaluation of the tested specimens by scanning electron microscopy showed dimpled microstructures at the primary fracture surface indicating ductile failures. However, at higher temperatures intergranular brittle failures were observed.

Keywords

Austenite; Steel alloys – Fatigue; Strains and stresses

Disciplines

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

Language

English

Comments

Conference held: San Antonio, Texas, USA, July 22–26, 2007

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.

Identifier

DOI: http://dx.doi.org/10.1115/PVP2007-26464; ISBN: 0-7918-4284-3; eISBN: 0-7918-3804-8

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