Growth of icosahedral medium-range order in liquid TiAl alloy during rapid solidification
Source abstract
Abstract
Abstract The formation and evolution of icosahedral medium-range order structures of TiAl alloy during the rapid solidification are investigated based on molecular dynamics simulations. The icosahedral medium-range order structural evolutions are described in detail by coordination number and icosahedral connectivity parameters. Simultaneously, the evolution of the medium-range order icosahedral clusters is analyzed by nano-clusters tracing method. The results reveal that the full growths of icosahedral medium-range order structures improve the glass forming ability and stability of metallic glass. Meanwhile, the hexagonal connected icosahedral clusters which link via volume-sharing have excellent structural stability, and the dendritic icosahedral clusters based on the hexagonal formation keep continuous growth below the Tg. The junctions which consist of the hexagonal formations enhance the compactness of icosahedral medium-range order structure. Moreover, the icosahedral medium-range order is an appropriate structural characterization which accurately defines the characteristics of amorphous TiAl alloy during the rapid solidification.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Mineralogy and Gemology Studies · Phase-change materials and chalcogenides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Metallic glasses10.1126/science.267.5206.1947 ↗
2. Stabilization of metallic supercooled liquid and bulk amorphous alloys10.1016/S1359-6454(99)00300-6 ↗
3. Glass formation, corrosion behavior and mechanical properties of bulk glassy Cu–Hf–Ti–Nb alloys10.1016/j.actamat.2005.04.037 ↗
4. A new Cu–Hf–Al ternary bulk metallic glass with high glass forming ability and ductility10.1016/j.scriptamat.2006.02.042 ↗
5. Comparative analysis of glass-formation in binary, ternary, and multicomponent alloys10.1063/1.3506687 ↗
6. Geometry of the structure of monatomic liquids10.1038/185068a0 ↗
7. A new structural model for transition metal–metalloid glasses10.1038/276484a0 ↗
8. Icosahedral medium-range orders and backbone formation in an amorphous alloy10.1007/s12540-010-1204-3 ↗
9. Local and medium range structures in amorphous alloys10.1016/0022-3093(85)90239-X ↗
10. Topology of covalent non-crystalline solids II: medium-range order in chalcogenide alloys and A Si (Ge)10.1016/0022-3093(81)90172-1 ↗
11. Interference function of crystalline embryo model of amorphous metals.–I, Japan10.1143/JJAP.21.981 ↗
12. A structural model for metallic glasses10.1038/nmat1219 ↗
13. Atomic packing and short-to-medium-range order in metallic glasses10.1038/nature04421 ↗
14. Icosahedral clustering with medium-range order and local elastic properties of amorphous metals10.1016/j.actamat.2010.03.029 ↗
15. Atomic-level structure and structure–property relationship in metallic glasses10.1016/j.pmatsci.2010.12.002 ↗
16. Icosahedral order in supercooled liquids and glassy alloys
17. Networked interpenetrating connections of icosahedra: effects on shear transformations in metallic glass10.1016/j.actamat.2010.09.020 ↗
18. Chen · 1999 · 371
19. Recent progress in the development of gamma titanium aluminide alloys10.1002/1527-2648(200011)2:11<699::AID-ADEM699>3.0.CO;2-J ↗
20. Investment casting technology for production of TiAl low pressure turbine blades—Process engineering and parameter analysis10.1016/j.intermet.2010.11.014 ↗
21. Effects of cutting angle, edge preparation, and nano-structured coating on milling performance of a gamma titanium aluminide10.1016/j.jmatprotec.2012.07.021 ↗
22. Evaluation of yttria applicability as a crucible for induction melting of TiAl alloy10.2320/matertrans.MAW201002 ↗
23. Solidification behaviour of TiAl-based alloys studied by directional solidification technique10.1016/j.intermet.2010.11.021 ↗
24. Molecular dynamics study on liquid-to-amorphous transition in Ti-Al alloys10.2320/matertrans1989.39.147 ↗
25. The rapid solidification of Ti3Al: a molecular dynamics study10.1088/0953-8984/16/24/002 ↗
26. A crystal plasticity materials constitutive model for polysynthetically-twinned γ-TiAl+α2-Ti3Al single crystals10.1023/A:1017942117952 ↗
27. Interatomic potentials for atomistic simulations of the Ti-Al system10.1103/PhysRevB.68.024102 ↗
28. Molecular dynamics simulation studies of structural and dynamical properties of rapidly quenched Al
29. Empirical criterion for the glass transition region based on Monte Carlo simulations10.1103/PhysRevLett.41.1244 ↗
30. Is the fragility of a liquid embedded in the properties of its glass?10.1126/science.1089446 ↗
31. Viscosity and specific volume of bulk metallic glass-forming alloys and their correlation with glass forming ability10.1016/j.actamat.2004.04.023 ↗
32. The influence of efficient atomic packing on the constitution of metallic glasses10.1080/1478643031000098828 ↗
33. Under what conditions can a glass be formed?10.1080/00107516908204405 ↗
34. Roles of local icosahedral chemical ordering in glass and quasicrystal formation in metallic glass formers10.1088/0953-8984/15/31/102 ↗
35. Poisson's ratio and the fragility of glass-forming liquids10.1038/nature02947 ↗
36. Short-range and medium-range order in rapidly quenched Al 50 Mg 50 alloy10.1016/j.jnoncrysol.2010.11.014 ↗
37. Cluster growing process and a sequence of magic numbers10.1103/PhysRevLett.90.053401 ↗
38. A model metal potential exhibiting polytetrahedral clusters10.1063/1.1574797 ↗
39. The double-funnel energy landscape of the 38-atom Lennard-Jones cluster10.1063/1.478595 ↗