Tag: paper

Megan Hurley published “Comparative Analysis of Austenitized Steel Microstructures Due to Induction and Conventional Heating in High Magnetic Field” in Metallurgical and Materials Transactions A. This brief communication discusses the different effects that induction and conventional heating have on austenite grain growth and annealing twin formation in a near-eutectoid steel composition after heat-treatment with and […]

Yonguk Lee published “Nucleation and subsequent growth of heteroepitaxially recrystallized γ grains in a polycrystalline Ni-base superalloy” in Materials Characterization. By directly tracking the microstructure evolution via ex-situ EBSD microscopy, the correlation between the initial deformation stored energy near primary γ’ particles and nucleation of HeRX was intuitively understood. Additionally, the initial size advantage from […]

Nathan Fripp has published his first paper titled “Controlling the Pre-bending Delay During laser Sheet Metal Forming Under Different Atmospheres” in Lasers in Manufacturing and Materials Processing. This paper identifies the factors that influence the temperature buildup during the initial stage of laser forming and aims to provide methods of minimizing the time required to […]

Yonguk Lee published “Heteroepitaxial recrystallization under steep strain and temperature gradients” in Superalloy 718 and Derivatives. This paper addresses the HeRX behavior at varying processing conditions, discussing HeRX’s potential role for the abnormally large grain formation at strain limited condition, and competition between HeRX nucleation and annealing twin nucleation at primary γ’ particles at varying […]

Yonguk Lee published “Unraveling the impact of pressure and hold time in post-process heat treatments on microstructure and microhardness evolution in laser powder bed fusion Alloy 718” in Progress in Additive Manufacturing. This collaborative work with the Illinois Institute of Technology reports the accelerated recrystallization of LPBF Alloy 718 during the HIP process, suggesting that […]

Megan Hurley has published her first paper entitled “Microstructural Evolution of Steel during Magnetic Field Assisted Processing” in a JOM special issue for diffusionless phase transformations in engineering alloys. This paper discusses how applying varied magnetic field strengths during thermal processing impacts the formation and growth of austenite, martensite, and pearlite microstructures in a near-eutectoid […]

Tianchen Wei published his first paper “Laser Bending Behavior of Austenitic Stainless Steels and Characterization of the Resultant Microstructures” in the Journal of Materials Engineering and Performance. This study establishes a correlation between the initial microstructure of the material and the resulting bending angles achieved through laser sheet metal forming. It further elucidates the microstructural […]

Yonguk 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 […]

Yonguk 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 […]

Benjamin Anthony recently published “A ‘step’ in the right direction: quantifying error in twinning analysis due to EBSD scan resolution” in Scripta Materialia. This paper demonstrates the error in calculated twin fraction and other features when using too-large EBSD step sizes. Read the paper here: https://doi.org/10.1016/j.scriptamat.2023.115929