Grain Growth Behaviour of Superalloy U720Li under Continuous Heating Conditions

Abstract:

In the present work, experimental research on grain growth kinetic at different temperatures and times of heat treatment for superalloy U720Li has been carried out. The average grain sizes have been obtained under different heat treatment temperatures and times. The aim of the present study was to quantify the progress of grain growth and the corresponding activation energy and growth exponent. It has been found that both the activation energies for grain growth and growth exponent differ a lot between before and after the solution of the primary γ phase. The activation energies increase with the increase in holding time. Those trends might be due to the different solute drag effect and the variational lattice constant of γ phase.

• Periodical: Advanced Materials Research (Volume 709)
• Pages: 161-165
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.709.161
• Online since: June 2013
• Authors: Tao Wang, Shu Hong Fu, Zhao Li, Yong Zhang, Yu Xin Zhao, Ling Guo
• Keywords: Activation Energy, Grain Growth, Heat Treatment, U720Li Alloy

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