• Synthesis, processing, and physical/mechanical behavior of advanced structural alloys

• Development and application of neutron scattering for structural materials research

RESEARCH 1 : SYNTHESIS & PROCESSING OF STRUCTURAL ALLOYS & COMPOSITES

OVERVIEW

This research program involves design, synthesis and processing of advanced structural alloys and composites using casting, powder metallurgy, electrodeposition, friction stir processing as well as characterizations using electron microscopy, neutron/synchrotron diffraction, and mechanical testing. The objectives of this research program are to (i) develop metallic alloys and composites with a significantly improved and balanced properties appropriate for unique and new structural applications  and (ii) explore and establish scientific/engineering principles of processing-microstructure-performance relationship of advanced structural and functional materials.

SPECIFIC INTERESTS

• Synthesis and processing: casting, powder metallurgy, electrodeposition, friction stir processing, etc.

• Materials: metallic glasses, ultrafine-grained alloys, nanostructured alloys, etc.

RELATED PUBLICATIONS

• H. Li, K. Tao, H. Choo, and P. K. Liaw, “Enhanced Strength and Ductility at a Cryogenic Temperature in a Nanostructured Ni-Fe Alloy”, Mater. Sci. Forum, Vols. 539-543, pp. 2828-2833 (2007).
• W. H. Jiang, F. Jiang, F. X. Liu, H. Choo, P. K. Liaw, and K. Q. Qiu, “Temperature Dependence of Serrated Flows in Compression in a Bulk Metallic Glass”, Appl. Phys. Lett, 89, 261909 (2006). 
• W. H. Jiang, G. J. Fan, H. Choo, and P. K. Liaw, “Ductility of Zr-Based Bulk Metallic Glass with Different Specimen Geometries”, Mater. Lett., 60, pp. 3537-3540 (2006). 
• W. H. Jiang, G. J. Fan, F. X. Liu, G. Y. Wang, H. Choo, and P. K. Liaw, “Rate Dependence of Shear Banding and Serrated Flows in a Bulk Metallic Glass”, J. Mater. Res., 21 (9), pp. 2164-2167 (2006). 
• G. J. Fan, L. F. Fu, Y. D. Wang, Y. Ren, H. Choo, P. K. Liaw, G. Y. Wang, N. D. Browning, “Uniaxial Tensile Plastic Deformation of a Bulk Nanocrystalline Alloy Studied by a High-Energy X-ray Diffraction Technique”, Appl. Phys. Lett., 89 (10), 101918 (2006). 
• D. C. Qiao, C. Fan, P. K. Liaw, and H. Choo, “Crystallization Kinetics of the (Zr₅₈Ni_13.6Cu₁₈Al_10.4)Nb₁ Bulk Metallic Glass”, Adv. Eng. Mater., 8 (8), pp. 714-719 (2006). 
• C. Fan, D. C. Qiao, T. W. Wilson, H. Choo, P. K. Liaw, “As-Cast Zr-Ni-Cu-Al-Nb Bulk Metallic Glasses Containing Nanocrystalline Particles with Ductility”, Mater. Sci. Eng. A., 431 (1-2), pp. 158-165 (2006). 
• W. H. Jiang, F. X. Liu, Y. D. Wang, H. F. Zhang, H. Choo, and P. K. Liaw, “Comparison of Mechanical Behavior between Bulk and Ribbon Cu-based Metallic Glasses”, Mater. Sci. & Eng. A, vol. 430 (1-2), 350-354 (2006). 
• G. J. Fan, H. Choo, and P. K. Liaw, “Embrittlement in a Bulk Nanocrystalline Alloy Induced by Room-Temperature Aging”, Appl. Phys. Lett., 89 (6), 061919 (2006). 
• C. Fan, P. K. Liaw, V. Haas, J. J. Wall, H. Choo, A. Inoue, and C. T. Liu, “Structures and Mechanical Behaviors of Zr₅₅Cu₃₅Al₁₀ Bulk Amorphous Alloys at Ambient and Cryogenic Temperatures”, Phys. Rev. B, 74 (1), 014205 (2006). 
• H. Li, K. Tao, C. Fan, P. K. Liaw, and H. Choo, “Effect of Temperature on Mechanical Behavior of Zr-Based Bulk Metallic Glasses, Appl. Phys. Lett., 89 (4), 041921 (2006). 
• H. Li, F. Ebrahimi, H. Choo, and P. K. Liaw, “Grain Size Dependence of Tensile Behavior in Nanocrystalline Ni-Fe Alloys”, J. Mater. Sci., 41, pp. 7636-7642 (2006).
• W. H. Jiang, F. Liu, D. C. Qiao, H. Choo, and P. K. Liaw, “Plastic Flow in Dynamic Compression of a Zr-Based Bulk Metallic Glass”, J. Mater. Res., 21 (6), pp. 1570-1575 (2006). 
• G. J. Fan, J. Z. Li, W. K. Rhim, D. C. Qiao, H. Choo, P. K. Liaw, and W. L. Johnson, “Thermophysical Properties of a Cu₄₆Zr₄₂Al₇Y₅ Bulk Metallic Glass-Forming Liquid”, Appl. Phys. Lett., 88 (22), 221909 (2006).
• C. Fan, L. J. Kecskes, T. Jiao, H. Choo, A. Inoue, and P. K. Liaw, “Shear Bands Deformation in Amorphous Alloys and Composites”, Mater. Trans., 47 (3), pp. 817-821 (2006). 
• C. Fan, T. W. Wilson, W. Dmowski, H. Choo, J. W. Richardson, E. R. Maxey, and P. K. Liaw, “Quenched-in Quasicrystal Medium-Range Order and Pair Distribution Function Study on Zr₅₅Cu₃₅Al₁₀ Bulk Metallic Glass”, Intermetallics, vol. 14 (8-9), 888-892 (2006). 
• D. C. Qiao, P. K. Liaw, C. Fan, Y. H. Lin, G. Y. Wang, H. Choo, and R. A. Buchanan, “Fatigue and Fracture Behavior of (Zr₅₈Ni_13.6Cu₁₈Al_10.4)₉₉Nb₁ Bulk-Amorphous Alloy”, Intermetallics, vol. 14 (8-9), pp. 1043-1050 (2006). 
• G. J. Fan, L. F. Fu, D. C. Qiao, H. Choo, P. K. Liaw, and N. D. Browning, "Grain Growth in a Bulk Nanocrystalline Co Alloy during Tensile Plastic Deformation", Scripta Mater., vol. 54 (12), 2137-2141 (2006).
• G. J. Fan, Y. D. Wang, L. F. Fu, H. Choo, P. K. Liaw, Y. Ren, and N. D. Browning, “Orientation-Dependent Grain Growth in a Bulk Nanocrystalline Alloy during the Uniaxial Compressive Deformation”, Appl. Phys. Lett., 88 (17), 171914 (2006). 
• C. Fan, H. Li, L. J. Kecskes, K. X. Tao, H. Choo, P. K. Liaw, and C. T. Liu, “Mechanical Behavior of Bulk Amorphous Alloys Reinforced by Ductile Particles at Cryogenic Temperatures”, Phys. Rev. Lett., 96 (14), 145506 (2006). 
• G. J. Fan, H. Choo, P. K. Liaw, and E. J. Lavernia, “Plastic Deformation and Fracture of Ultrafine-grained Al-Mg Alloys with a Bimodal Grain-size Distribution”, Acta Mater., vol. 54 (7), 1759-1766 (2006).
• J. J. Wall, C. Fan, P. K. Liaw, C. T. Liu, and H. Choo, “A Combined Drop/Suction-Casting Machine for the Manufacture of Bulk Metallic Glass Materials,” Rev. Sci. Instrum., vol. 77 (3), 033902 (2006). 
• H. Q. Li, C. Fan, K. X. Tao, H. Choo, and P. K. Liaw, “Compressive Behavior of a Zr-Based Metallic Glass at Cryogenic Temperatures”, Adv. Mater., vol. 18 (6), 752-754 (2006). 
• C. L. Xu, J. F. Chen, Y. Cui, Q. Han, H. Choo, P. K. Liaw, D. H. Wu,  “Influence of the Surface Treatment on the Deposition of Platinum Nanoparticles on the Carbon Nanotubes”, Adv. Eng. Mater., vol. 8 (1-2), 73-77 (2006).
• C. Fan, L. J. Kecskes, D. Qiao, H. Choo, and P. K. Liaw, “Properties of As-Cast and Structurally Relaxed Zr-Based Bulk Metallic Glasses”, J. Non-Crystall. Solids, vol. 352 (2), 174-179 (2006).
• T. W. Wilson, H. Choo, W. D. Porter, S. A. Speakman, C. Fan, and P. K. Liaw, “Amorphization and Crystallization Processes of the Ball-Milled Al-Y-Fe-TM Alloys (TM=Ni, Co, Cu, and Fe)”, J. Non-Crystall. Solids, 352, pp. 4024-4029 (2006). 
• C. Fan, P. K. Liaw, T. W. Wilson, W. Dmoski, H. Choo, C. T. Liu, J. W. Richardson, Th. Proffen, “Structural Model for Bulk Amorphous Alloys”, Appl. Phys. Lett., 89, 111905 (2006). 
• Y. D. Wang, Y. Ren, M. L. Benson, H. Choo, P. K. Liaw, Y. D. Liu, L. Zuo, and D. Brown, “Phase Transformation in Ferromagnetic Shape-Memory Alloys”, Powder Diffr., 21, 179 (2006). 
• G. J. Fan, L. F. Fu, H. Choo, P. K. Liaw, and N. D. Browning, “Uniaxial Tensile Plastic Deformation and Grain Growth of Bulk Nanocrystalline Alloys”, Acta Mater., 54 (18), pp. 4781-4792 (2006). 
• G. J. Fan, H. Choo, P. K. Liaw, and E. J. Lavernia, “A Model for the Inverse Hall-Petch Relation of Nanocrystalline Materials”, Mater. Sci. Eng. A, vol. 409 (1-2), 243-248 (2005). 
• G. J. Fan, H. Choo, and P. K. Liaw, “Fragility of Metallic Glass-Forming Liquids: A Simple Thermodynamic Connection”, J. Non-Crystall. Solids, vol. 351 (52-54), 3879-3883 (2005). 
• Y. Cui, C. L. Xu, Q. Y. Han, H. Choo, and P. K. Liaw, “Formation of Dendritic Nanotubes under an Electric Field”, Adv. Eng. Mater., 7 (9),  827-829 (2005). 
• C. Fan, H. Choo, P. K. Liaw, “Influences of Ta, Nb, or Mo Additions in Zr-based Bulk Metallic Glasses on Microstructure and Thermal Properties”, Scripta Mater., vol. 53 (12), 1407-1410 (2005). 
• G. J. Fan, H. Choo, P. K. Liaw, and E. J. Lavernia, “Strength Softening and Stress Relaxation of Nanostructured Materials”, Metall. Mater. Trans., 36A (10), 2641-2649 (2005).
• G. J. Fan, G. Y. Wang, H. Choo, P. K. Liaw, B. Q. Han, Y. S. Park, and E. J. Lavernia, “Deformation Behavior of Ultrafine-Grained Al-Mg Alloy at Different Strain Rates”, Scripta Mater., vol. 52 (9), 929-933 (2005).

ADVANCED MATERIALS SYNTHESIS LAB (Opens a new window)