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Microstructural Characterization of Creep Damaged 11Cr-3.5W-3Co Steel
Kim, C.S.,Kwun, S.I.,Ahn, Bong Young,Nahm, Seung Hoon,Lee, Seung Seok Scitec Publications Ltd. 2006 Solid State Phenomena Vol.118 No.-
<P>The effects of the precipitate and martensite lath on the softening behavior have been investigated for 11Cr-3.5W-3Co steel during creep at 700. During creep, the precipitate on the PAG (prior austenite grain) boundaries and martensite lath boundaries coarsened. The recovery of dislocation density and an increase of martensite lath width took place. It is shown that the inverse of the size of the precipitates and the inverse of the square root of the martensite lath width have a linear relation with the Vickers hardness, which corresponds to the Hall-Petch relation and particle looping mechanism.</P>