Journal
JOURNAL OF MATERIALS RESEARCH
Volume 26, Issue 10, Pages 1253-1259Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2011.70
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Funding
- Korea government Ministry of Knowledge Economy [20101020300460]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20101020300460] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this work, we have systematically explored the influence of thermo-mechanical treatment on the precipitation behavior and its strengthening in Inconel 740, a relatively new Ni-based superalloy, using specimens on which different levels of stresses were applied at 700 degrees C. With increasing applied stress, fraction of gamma prime precipitates increased (without significant size change) and nanoindentation hardness was enhanced. The stress effects were discussed in terms of the free energy barrier for heterogeneous nucleation and the prevailing mechanisms of precipitation strengthening.
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