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Effect of ultrasonic melt treatment on the refinement of primary Al3Ti intermetallic in an Al–0.4Ti alloy (2015)
Journal Article
Mi, J., Connolley, T., Eskin, D., & Wang, F. (2016). Effect of ultrasonic melt treatment on the refinement of primary Al3Ti intermetallic in an Al–0.4Ti alloy. Journal of Crystal Growth, 435, 24-30. https://doi.org/10.1016/j.jcrysgro.2015.11.034

High intensity ultrasonic melt treatment was applied to an Al–0.4 wt% Ti alloy over three selected temperature ranges: 810 to 770 °C (above liquidus), 770 to 730 °C (across liquidus), and 730 to 690 °C (below liquidus). The size and morphology of the... Read More about Effect of ultrasonic melt treatment on the refinement of primary Al3Ti intermetallic in an Al–0.4Ti alloy.

In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth (2015)
Journal Article
Li, F., Zhang, J., Dong, Q., Dai, Y., Fu, Y., Xie, H., …Sun, B. (2015). In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth. Materials Characterization, 109, 9-18. https://doi.org/10.1016/j.matchar.2015.09.008

© 2015 Elsevier Inc. All rights reserved. Special growth pattern representing unique growth conditions is a vital clue to investigate the morphology evolution mechanism in metallic alloy solidification. The dendrite pattern and growth orientation of... Read More about In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth.

Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al (2015)
Journal Article
Yang, J., Zhang, J., Dai, Y., Ma, J., Li, F., Bian, F., …Sun, B. (2015). Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al. Computational Materials Science, 109, 41-48. https://doi.org/10.1016/j.commatsci.2015.05.033

© 2015 Elsevier B.V. All rights reserved. In this study, the elements Fe, Si, V and Ti, which exhibit typical segregation behavior in Al, were chosen as solute atoms to be analyzed. The structure of molten Al, the local structure around solute atoms... Read More about Ab initio simulation: The correlation between the local melt structure and segregation behavior of Fe, V, Ti and Si in liquid Al.

Solidification of Al alloys under electromagnetic pulses and characterization of the 3D microstructures under synchrotron x-ray tomography (2015)
Journal Article
Manuwong, T., Zhang, W., Kazinczi, P. L., Bodey, A. J., Rau, C., & Mi, J. (2015). Solidification of Al alloys under electromagnetic pulses and characterization of the 3D microstructures under synchrotron x-ray tomography. Metallurgical and materials transactions. A, Physical metallurgy and materials science, 46(7), 2908-2915. https://doi.org/10.1007/s11661-015-2874-8

A novel programmable electromagnetic pulse device was developed and used to study the solidification of Al-15 pct Cu and Al-35 pct Cu alloys. The pulsed magnetic fluxes and Lorentz forces generated inside the solidifying melts were simulated using fi... Read More about Solidification of Al alloys under electromagnetic pulses and characterization of the 3D microstructures under synchrotron x-ray tomography.

High speed synchrotron X-ray imaging studies of the ultrasound shockwave and enhanced flow during metal solidification processes (2015)
Journal Article
Tan, D., Lee, T. L., Khong, J. C., Connolley, T., Fezzaa, K., & Mi, J. (2015). High speed synchrotron X-ray imaging studies of the ultrasound shockwave and enhanced flow during metal solidification processes. Metallurgical and materials transactions. A, Physical metallurgy and materials science, 46(7), 2851-2861. https://doi.org/10.1007/s11661-015-2872-x

The highly dynamic behaviour of ultrasonic bubble implosion in liquid metal, the multiphase liquid metal flow containing bubbles and particles, and the interaction between ultrasonic waves and semisolid phases during solidification of metal were stud... Read More about High speed synchrotron X-ray imaging studies of the ultrasound shockwave and enhanced flow during metal solidification processes.

Characterization of the residual stresses in spray-formed steels using neutron diffraction (2015)
Journal Article
Lee, T. L., Mi, J., Zhao, S. L., Fan, J. F., Zhang, S. Y., Kabra, S., & Grant, P. S. (2015). Characterization of the residual stresses in spray-formed steels using neutron diffraction. Scripta materialia, 100, 82-85. https://doi.org/10.1016/j.scriptamat.2014.12.019

Neutron diffraction was used to characterize the residual stresses in an as-sprayed tube-shaped steel preform. The measured residual stress distributions were compared with those simulated using finite element method by taking into account the effect... Read More about Characterization of the residual stresses in spray-formed steels using neutron diffraction.

In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures (2014)
Journal Article
Mi, J., Tan, D., & Lee, T. L. (2015). In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures. Metallurgical and Materials Transactions B, 46(4), 1615-1619. https://doi.org/10.1007/s11663-014-0256-z

Considerable progress has been made in studying the mechanism and effectiveness of using ultrasound waves to manipulate the solidification microstructures of metallic alloys. However, uncertainties remain in both the underlying physics of how microst... Read More about In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures.

The onset of plasticity of a Zr-based bulk metallic glass (2014)
Journal Article
Huang, Y., Khong, J. C., Connolley, T., & Mi, J. (2014). The onset of plasticity of a Zr-based bulk metallic glass. International Journal of Plasticity, 60, 87-100. https://doi.org/10.1016/j.ijplas.2014.05.003

The deformation behaviors of a Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glassy alloy under step-controlled tensile loads have been studied in situ and systematically using scanning electron microscopy and synchrotron X-ray diffraction. A circular h... Read More about The onset of plasticity of a Zr-based bulk metallic glass.

The effect of cooling rate on the wear performance of a ZrCuAlAg bulk metallic glass (2014)
Journal Article
Huang, Y., Fan, H., Wang, D., Sun, Y., Liu, F., Shen, J., …Mi, J. (2014). The effect of cooling rate on the wear performance of a ZrCuAlAg bulk metallic glass. Materials and Design, 58, 284-289. https://doi.org/10.1016/j.matdes.2014.01.067

In the present work, the local atomic ordering and the wear performance of ZrCuAlAg bulk metallic glass (BMG) samples with different diameters have been studied using transmission electron microscopy (TEM) plus autocorrelation function analysis, and... Read More about The effect of cooling rate on the wear performance of a ZrCuAlAg bulk metallic glass.

Understanding the deformation mechanism of individual phases of a ZrTi-based bulk metallic glass matrix composite using in situ diffraction and imaging methods (2014)
Journal Article
Huang, Y., Khong, J. C., Connolley, T., & Mi, J. (2014). Understanding the deformation mechanism of individual phases of a ZrTi-based bulk metallic glass matrix composite using in situ diffraction and imaging methods. Applied physics letters, 104(3), Article 031912. https://doi.org/10.1063/1.4863095

The plasticity of a ZrTi-based bulk metallic glass composite consisting of glassy matrix and crystalline dendritic phase was studied in-situ under identical tensile loading conditions using scanning electron microscopy and synchrotron X-ray diffracti... Read More about Understanding the deformation mechanism of individual phases of a ZrTi-based bulk metallic glass matrix composite using in situ diffraction and imaging methods.

The interdendritic-melt solidification control (IMSC) and its effects on the porosity and phase change of a Ni-based superalloy (2013)
Journal Article
Zheng, L., Zhang, G., Xiao, C., Lee, T. L., Han, B., Li, Z., …Mi, J. (2014). The interdendritic-melt solidification control (IMSC) and its effects on the porosity and phase change of a Ni-based superalloy. Scripta materialia, 74, 84-87. https://doi.org/10.1016/j.scriptamat.2013.11.001

A novel interdendritic-melt solidification control (IMSC) technique is developed to manufacture equiaxed Ni-based superalloy with much reduced porosity. The basic concept of IMSC is illustrated. The effects of IMSC on the porosity and phases of IN792... Read More about The interdendritic-melt solidification control (IMSC) and its effects on the porosity and phase change of a Ni-based superalloy.

Phase field study of the tip operating state of a freely growing dendrite against convection using a novel parallel multigrid approach (2013)
Journal Article
Guo, Z., Mi, J., Xiong, S., & Grant, P. (2014). Phase field study of the tip operating state of a freely growing dendrite against convection using a novel parallel multigrid approach. Journal of Computational Physics, 257(A), 278-297. https://doi.org/10.1016/j.jcp.2013.10.004

Alloy dendrite growth during solidification with coupled thermal-solute-convection fields has been studied by phase field modeling and simulation. The coupled transport equations were solved using a novel parallel-multigrid numerical approach with hi... Read More about Phase field study of the tip operating state of a freely growing dendrite against convection using a novel parallel multigrid approach.

Rich tomography techniques for the analysis of microstructure and deformation (2013)
Journal Article
Baimpas, N., Xie, M., Song, X., Hofmann, F., Abbey, B., Marrow, J., …Korsunsky, A. M. (2014). Rich tomography techniques for the analysis of microstructure and deformation. International Journal of Computational Methods, 11(3), Article 1343006. https://doi.org/10.1142/S0219876213430068

Until very recently, the three-dimensionality of the material world presented numerous challenges in terms of characterization, data handling, visualization, and modeling. For this reason, 2D representation of sections, projections, or surfaces remai... Read More about Rich tomography techniques for the analysis of microstructure and deformation.

The effects of annealing on the microstructure and the dynamic mechanical strength of a ZrCuNiAl bulk metallic glass (2013)
Journal Article
Huang, Y., Zheng, W., Fan, H., Wang, D., Shen, J., & Mi, J. (2013). The effects of annealing on the microstructure and the dynamic mechanical strength of a ZrCuNiAl bulk metallic glass. Intermetallics, 42, 192-197. https://doi.org/10.1016/j.intermet.2013.07.001

Isothermal annealing has been applied to a bulk metallic glass alloy, Zr50.7Cu28Ni9Al12.3. Nanocrystalline precipitates, mainly consisting of Ni3Zr and Ni42Zr 58 phases, appear from the amorphous matrix when annealed at 743 K for different times, and... Read More about The effects of annealing on the microstructure and the dynamic mechanical strength of a ZrCuNiAl bulk metallic glass.

Phase field simulation of binary alloy dendrite growth under thermal- and forced-flow fields: An implementation of the parallel-multigrid approach (2013)
Journal Article
Guo, Z., Mi, J., Xiong, S., & Grant, P. S. (2013). Phase field simulation of binary alloy dendrite growth under thermal- and forced-flow fields: An implementation of the parallel-multigrid approach. Metallurgical and Materials Transactions B, 44(4), 924-937. https://doi.org/10.1007/s11663-013-9861-5

Dendrite growth and morphology evolution during solidification have been studied using a phase field model incorporating melt convection effects, which was solved using a robust and efficient parallel, multigrid computing approach. Single dendrite gr... Read More about Phase field simulation of binary alloy dendrite growth under thermal- and forced-flow fields: An implementation of the parallel-multigrid approach.

In situ study of the evolution of atomic strain of bulk metallic glass and its effects on shear band formation (2013)
Journal Article
Huang, Y. J., Khong, J. C., Connolley, T., & Mi, J. (2013). In situ study of the evolution of atomic strain of bulk metallic glass and its effects on shear band formation. Scripta materialia, 69(3), 207-210. https://doi.org/10.1016/j.scriptamat.2013.03.016

The tensile behavior of TiZrNiCuBe metallic glass was studied using synchrotron X-ray diffraction and scanning electron microscopy. Shear band formation was carefully controlled by the introduction of a stress gradient due to a semi-circular notch. M... Read More about In situ study of the evolution of atomic strain of bulk metallic glass and its effects on shear band formation.

High speed imaging study of the dynamics of ultrasonic bubbles at a liquid-solid interface (2013)
Presentation / Conference Contribution
Tan, D., & Mi, J. (2013). High speed imaging study of the dynamics of ultrasonic bubbles at a liquid-solid interface. Materials Science Forum, 765, 230-234. https://doi.org/10.4028/www.scientific.net/MSF.765.230

High speed imaging, including the ultrafast synchrotron X-ray imaging facility at the beamline 32-ID-B of the Advanced Photon Source (APS), was used to study in-situ (1) the dynamics of ultrasonic bubbles inside a water suspension with an acoustic fi... Read More about High speed imaging study of the dynamics of ultrasonic bubbles at a liquid-solid interface.

Ultrafast X-ray imaging and modelling of ultrasonic cavitations in liquid metal (2013)
Presentation / Conference Contribution
Lee, T. L., Khong, J. C., Fezzaa, K., & Mi, J. (2013). Ultrafast X-ray imaging and modelling of ultrasonic cavitations in liquid metal. Materials Science Forum, 765, 190-194. https://doi.org/10.4028/www.scientific.net/MSF.765.190

The dynamics of ultrasonic bubbles in liquid metal are captured in-situ for the first time using the ultrafast X-ray phase contrast imaging facility housed at the Advanced Photon Source, Argonne National Laboratory, in the USA. The experimental obser... Read More about Ultrafast X-ray imaging and modelling of ultrasonic cavitations in liquid metal.