Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 405, Issue 1, Pages 9-16Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2010.07.026
Keywords
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Funding
- MEST/NRF of Korea [2005-2004718, 2009-0083392]
- Ministry of Education, Science and Technology of Korea
- National Research Foundation of Korea [2005-2004718, 2009-0083392, 핵06A1605] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effects of high temperature environmental damage on low temperature embrittlement of wrought nickel-base superalloys, Alloy 617 and Haynes 230 were evaluated. They were aged in an impure helium environment at 1000 degrees C for up to 500 h before tensile tested at room temperature. The tensile test results showed that the loss of ductility was associated with the increase in the inter-granular fracture with aging time. For Alloy 617, inter-granular oxidation and coarsening of grain boundary carbides contributed to the embrittlement. The significant loss of ductility in Haynes 230 was only observed after 500 h of aging when the globular intermetallic precipitates were extensively formed and brittle inter-granular cracking began to occur. (C) 2010 Elsevier B.V. All rights reserved.
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