Effect of Elements on Hot Tearing of Directionally Solidified Ni-Based Superalloys

Yan Li Wang; Zhao Hui Huang; Xi Hong Zhao; Jia Rong Li

doi:10.4028/www.scientific.net/AMR.150-151.975

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 150-151Effect of Elements on Hot Tearing of Directionally...

Effect of Elements on Hot Tearing of Directionally Solidified Ni-Based Superalloys

Abstract:

The effect of elements such as Ti, Al, Hf, Zr and B on hot tearing susceptibility during directional solidification was explored by tube-like samples with thickness of 1.0 mm, 1.5mm and 2.0mm in wall. Results of SEM of elements on solidification of casting Ni-based superalloys were presented. The influential extent among the investigated elements is found to be: the largest is Ti, then Zr, B and Al, and Hf is the smallest. Titanium promotes the formation of (γ+γ´) eutectic, increases sizes of the eutectic. Increasing Al content results in the size of γ+γ´ eutectic and the number of γ´. Increasing Zr content promotes γ+γ´ eutectic.Varying B content shows little microstructural evolution.

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Periodical:

Advanced Materials Research (Volumes 150-151)

Pages:

975-978

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.150-151.975

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Online since:

October 2010

Authors:

Yan Li Wang, Zhao Hui Huang, Xi Hong Zhao, Jia Rong Li

Keywords:

Directional Solidification, Hot Tearing, Microstructure, Ni Based Superalloy

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