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Data and videos for ultrafast synchrotron X-ray imaging studies of metal solidification under ultrasound (2018)
Journal Article
Wang, B., Tan, D., Lee, T. L., Khong, J. C., Wang, F., Eskin, D., …Mi, J. (2018). Data and videos for ultrafast synchrotron X-ray imaging studies of metal solidification under ultrasound. Data in Brief, 17, (837-841). doi:10.1016/j.dib.2018.01.110. ISSN 2352-3409

The data presented in this article are related to the paper entitled ‘Ultrafast synchrotron X-ray imaging studies of microstructure fragmentation in solidification under ultrasound’ [Wang et al., Acta Mater. 144 (2018) 505-515]. This data article pro... Read More

Ultrafast synchrotron X-ray imaging studies of microstructure fragmentation in solidification under ultrasound (2017)
Journal Article
Wang, B., Tan, D., Lee, T. L., Khong, J. C., Wang, F., Eskin, D., …Mi, J. (2018). Ultrafast synchrotron X-ray imaging studies of microstructure fragmentation in solidification under ultrasound. Acta Materialia, 144, (505-515). doi:10.1016/j.actamat.2017.10.067. ISSN 1359-6454

Ultrasound processing of metal alloys is an environmental friendly and promising green technology for liquid metal degassing and microstructural refinement. However many fundamental issues in this field are still not fully understood, because of the... Read More

In situ observation of ultrasonic cavitation-induced fragmentation of the primary crystals formed in Al alloys (2017)
Journal Article
Wang, F., Tzanakis, I., Eskin, D., Mi, J., & Connolley, T. (2017). In situ observation of ultrasonic cavitation-induced fragmentation of the primary crystals formed in Al alloys. Ultrasonics Sonochemistry, 39, (66-76). doi:10.1016/j.ultsonch.2017.03.057. ISSN 1350-4177

The cavitation-induced fragmentation of primary crystals formed in Al alloys were investigated for the first time by high-speed imaging using a novel experimental approach. Three representative primary crystal types, Al3Ti, Si and Al3V with different... Read More

On the occurrence of a eutectic-type structure in solidification of Al-Zr alloys (2017)
Journal Article
Wang, F., Eskin, D. G., Khvan, A. V., Starodub, K. F., Lim, J. J., Burke, M. G., …Mi, J. (2017). On the occurrence of a eutectic-type structure in solidification of Al-Zr alloys. Scripta materialia, 133, (75-78). doi:10.1016/j.scriptamat.2017.02.027. ISSN 1359-6462

For the first time, experimental evidence is presented for the occurrence of a eutectic reaction in dilute Al-Zr alloys solidified at cooling rates from 0.5 to 5 K/s. Particles which formed at grain boundaries during solidification were confirmed by... Read More

Numerical and physical simulation of rapid microstructural evolution of gas atomised Ni superalloy powders (2016)
Journal Article
Li, Z., Grant, P. S., Zheng, L., Lee, T. L., Liu, N., Liu, Z., …Grant, P. (2017). Numerical and physical simulation of rapid microstructural evolution of gas atomised Ni superalloy powders. Materials & design, 117, (157-167). doi:10.1016/j.matdes.2016.12.074. ISSN 0264-1275

The rapid microstructural evolution of gas atomised Ni superalloy powder compacts over timescales of a few seconds was studied using a Gleeble 3500 thermomechanical simulator, finite element based numerical model and electron microscopy. The study fo... Read More

Multi-scale characterisation of the 3D microstructure of a thermally-shocked bulk metallic glass matrix composite (2016)
Journal Article
Zhang, W., Mi, J., Bodey, A. J., Kockelmann, W., Korsunsky, A. M., Rau, C., & Sui, T. (2016). Multi-scale characterisation of the 3D microstructure of a thermally-shocked bulk metallic glass matrix composite. Scientific reports, 6(1), (18545-1-18545-7). doi:10.1038/srep18545. ISSN 2045-2322

Bulk metallic glass matrix composites (BMGMCs) are a new class of metal alloys which have significantly increased ductility and impact toughness, resulting from the ductile crystalline phases distributed uniformly within the amorphous matrix. However... Read More

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). doi:10.1016/j.jcrysgro.2015.11.034. ISSN 0022-0248

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

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). doi:10.1016/j.scriptamat.2014.12.019. ISSN 1359-6462

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

In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures (2014)
Journal Article
Tan, D., Lee, T. L., & Mi, J. (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). doi:10.1007/s11663-014-0256-z. ISSN 1073-5615

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

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. doi: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

The effect of cooling rate on the wear performance of a ZrCuAlAg bulk metallic glass (2014)
Journal Article
Mi, J., Fan, H., Huang, Y., Liu, F., Shen, J., Sun, J., …Wang, D. (2014). The effect of cooling rate on the wear performance of a ZrCuAlAg bulk metallic glass. Materials and Design, 58, (284-289). doi:10.1016/j.matdes.2014.01.067. ISSN 0261-3069

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

A high-speed imaging and modeling study of dendrite fragmentation caused by ultrasonic cavitation (2012)
Journal Article
Shu, D., Sun, B., Grant, P. S., & Mi, J. (2012). A high-speed imaging and modeling study of dendrite fragmentation caused by ultrasonic cavitation. Metallurgical and materials transactions. A, Physical metallurgy and materials science, 43(10), (3755-3766). doi:10.1007/s11661-012-1188-3. ISSN 1073-5623

The dynamic behavior of ultrasound-induced cavitation bubbles and their effect on the fragmentation of dendritic grains of a solidifying succinonitrile 1 wt pct camphor organic transparent alloy have been studied experimentally using high-speed digit... Read More

An implicit parallel multigrid computing scheme to solve coupled thermal-solute phase-field equations for dendrite evolution (2011)
Journal Article
Mi, J., Grant, P. S., & Guo, Z. (2012). An implicit parallel multigrid computing scheme to solve coupled thermal-solute phase-field equations for dendrite evolution. Journal of Computational Physics, 231(4), (1781-1796). doi:10.1016/j.jcp.2011.11.006. ISSN 0021-9991

An implicit, second-order space and time discretization scheme together with a parallel multigrid method involving a strip grid domain partitioning has been developed to solve fully coupled, nonlinear phase field equations involving solute and heat t... Read More