Solidification Characteristics and as-Cast Microstructure of Rhenium-Containing Single Crystal Superalloys under High Thermal Gradient Directional Solidification

Gang Liu; Lin Liu; Xin Bao Zhao; Tai Wen Huang; Jun Zhang

doi:10.4028/www.scientific.net/AMR.278.423

Paper Titles

A1-L1₂ Structures in the Al-Co-Ni-Ti Quaternary Phase System
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Development of New C&W Superalloys for High Temperature Disk Applications
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Hot Deformation Behaviors and Microstructure Evolution in a New PM Nickel-Base Superalloy
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Undercoolability of Superalloys and Solidification Defects in Single Crystal Components
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Solidification Characteristics and as-Cast Microstructure of Rhenium-Containing Single Crystal Superalloys under High Thermal Gradient Directional Solidification
p.423

Investigation of Freckle Formation under Various Solidification Conditions
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A Study of the Weldability of Gamma Prime Hardened Superalloys
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Characterization of the Weld Line Zones of an Inertia Friction Welded Superalloy
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Crack-Free Welding of IN 738 by Linear Friction Welding
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 278Solidification Characteristics and as-Cast...

Solidification Characteristics and as-Cast Microstructure of Rhenium-Containing Single Crystal Superalloys under High Thermal Gradient Directional Solidification

Abstract:

A series of Ni-base single crystal superalloys with increasing contents of Re (3-6 wt. %) were directionally solidified under a high thermal gradient of approximately 250 K/cm. It shows that Re additions slightly increases the liquidus temperature, but decreases the eutectic reaction and γ′-solvus temperature of the experimental alloys. EPMA analysis indicates that Re addition strongly influences the segregation ratios of the constituent elements, particularly for Cr, Mo and W, and thus results in more severe dendrite segregation and large amount of eutectic formation in the as-cast microstructures.

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Periodical:

Advanced Materials Research (Volume 278)

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423-427

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.278.423

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Online since:

July 2011

Authors:

Gang Liu, Lin Liu, Xin Bao Zhao, Tai Wen Huang, Jun Zhang

Keywords:

High Thermal Gradient, Rhenium, Solidification Characteristics

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