Microstructure Evolution and Processing Map of Superalloy GH720Li during Isothermal Compression

Zhao Li; Shu Hong Fu; Tao Wang; Yu Xin Zhao; Yong Zhang; Mai Cang Zhang

doi:10.4028/www.scientific.net/MSF.747-748.588

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Superalloys and the Development of Advanced Ultra-Supercritical Power Plants
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HomeMaterials Science ForumMaterials Science Forum Vols. 747-748Microstructure Evolution and Processing Map of...

Microstructure Evolution and Processing Map of Superalloy GH720Li during Isothermal Compression

Abstract:

sothermal compression tests for superalloy GH720Li were conducted to investigate the effect of hot deformation parameters on microstructure evolution. The changing characteristics of flow stress during hot deformation were also studied. The flow instability area was calculated based on Prasad Plastic Instability Criterion and the hot processing map was obtained. The results showed that dynamic recrystallization was the main softening mechanism of GH720Li alloy during hot deformation. The peak and steady stress decreased significantly with an increase of test temperature and a decrease of the strain rate. Finally, three unstable areas have been found from the processing map.

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Periodical:

Materials Science Forum (Volumes 747-748)

Pages:

588-593

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.747-748.588

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Online since:

February 2013

Authors:

Zhao Li, Shu Hong Fu, Tao Wang, Yu Xin Zhao, Yong Zhang, Mai Cang Zhang

Keywords:

GH720Li, Hot Deformation Behavior, Microstructure Evolution, Processing Map

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References

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