Tag: Yonguk Lee
Yonguk Lee publishes paper describing multiply coherent gamma grains in a Ni-base superalloy
August 21, 2024Yonguk Lee recently published “On the Formation of Multiply Coherent γ Grains in a Powder Metallurgy Ni Base Superalloy” in the Superalloys 2024 proceedings. The paper reports a unique γ microstructure which contains multiple pinning particles inside that are coherent (multiply coherent gamma grains, MCGs), which are explained to have possibly formed through the combined effect of initial orientation […]
Read more »![HAADF-STEM images of the LHSR alloy. a Low magnification image showing multiple primary γ′ particles. b Magnified image of the red dashed box in (a) that shows round, darker areas on the right side of the image, indicative of tertiary γ′ precipitates. c Magnified image of the dashed orange box in (b) highlighting the coherent γ-γ′ interface. d High magnification HAADF-STEM image along the [112] zone axis from (c) marked by the blue dashed box, showing the atomic structure of the L12 γ′ LHSR alloy.](https://faculty.eng.ufl.edu/miller-mse/wp-content/uploads/sites/236/2024/08/13_modified-1024x937.png)
Yonguk Lee publishes paper describing the prevalence of HeRX in LSHR
January 23, 2024Yonguk Lee recently published “Prevalence of Heteroepitaxial Recrystallization in the Low Solvus High Refractory (LSHR) γ–γ′ Superalloy” in Metallography, Microstructure, and Analysis. The paper reports the observation of HeRX outside of low-misfit Ni-base superalloys for the first time, which suggests that HeRX can contribute to microstructural evolution in a much wider range of polycrystalline Ni-base […]
Read more »Yonguk Lee passes MSE qualifying exam!
May 1, 2023Yonguk (Tony) Lee passed his qualifying exam, with his proposal entitled “Heteroepitaxial recrystallization in Ni-based superalloys: its nucleation and boundary character.”
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