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Creep-Environment Interactions of Alloy 617 at Elevated Temperature

[+] Author Affiliations
Daejong Kim, Changheui Jang

KAIST, Daejeon, South Korea

Woo Seog Ryu

Korea Atomic Energy Research Institute (KAERI), Daejeon, South Korea

Paper No. PVP2008-61415, pp. 1215-1220; 6 pages
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4829-6
  • Copyright © 2008 by ASME


Creep behavior and degradation of creep properties of high-temperature materials often limit the lives of components and structures designed to operate for extended period under stress at elevated temperatures. A nickel-base superalloy, Alloy 617 in particular which is considered as a prospective material for hot gas duct and intermediate heat exchanger in very high temperature gas cooled reactor, was studied for creep properties. Creep tests were carried out under various sustained tensile loadings in air and helium environments at temperature of 800°C, 900°C, and 1000°C. Times for 1% creep strain and creep rupture were taken from the short-term creep tests within 1000 hours. Effect of creep-environment interaction on creep strain and changes in viscous deformation properties by dynamic recrystallization were discussed.

Copyright © 2008 by ASME
Topics: Creep , Temperature , Alloys



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