Ultrahigh strength Al-based amorphous alloys containing Sc
- 1 May 2004
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 19 (5), 1539-1543
- https://doi.org/10.1557/jmr.2004.0206
Abstract
Amorphous metallic alloys possess high strength characteristics, which are superior to crystalline materials. Here we report an influence of Sc addition on glass-forming ability, glass-transition behavior, supercooled liquid region, and mechanical properties of an Al84Y9Ni5Co2 glassy alloy. This paper also aims to present a promising (Al0.84Y0.09Ni0.05Co0.02)95Sc5 amorphous alloy. This alloy has an ultrahigh tensile fracture strength exceeding 1500 MPa, which surpasses those for all the other Al-based fully crystalline and amorphous alloys reported to date, in addition to high Young’s modulus of 78 GPa. The fracture surface of this new alloy exhibited vein pattern typical for amorphous alloys with good ductility, and multiple shear bandswere observed on the lateral surface. The ultrahigh tensile strength of the (Al0.84Y0.09Ni0.05Co0.02)95Sc5 amorphous alloy results from an increase in the interatomic constraint force by the addition of Sc, an element having highly negative enthalpy of mixing with Al, Ni, and Co and the highest chemical affinity with Al among the alloying elements.Keywords
This publication has 19 references indexed in Scilit:
- Amorphization and nanostructure synthesis in Al alloysIntermetallics, 2002
- Investigation of Structure and Properties of the Al–Y–Ni–Co–Cu Metallic GlassesJournal of Materials Research, 2002
- Strong influence of supercooled liquid on crystallization of the Al85Ni5Y4Nd4Co2 metallic glassApplied Physics Letters, 2001
- Full or partial replacement of Y by rare-earth and some other elements in the Al85Y8Ni5Co2 alloyJournal of Light Metals, 2001
- Fabrications and mechanical properties of bulk amorphous, nanocrystalline, nanoquasicrystalline alloys in aluminum-based systemJournal of Light Metals, 2001
- Calculations of Mixing Enthalpy and Mismatch Entropy for Ternary Amorphous AlloysMaterials Transactions, JIM, 2000
- New Amorphous Alloys with Good Ductility in Al-Ce-M (M=Nb, Fe, Co, Ni or Cu) SystemsJapanese Journal of Applied Physics, 1988
- Synthesis and Properties of Metallic Glasses That Contain AluminumScience, 1988
- New Amorphous Al-Y, Al-La and Al-Ce Alloys Prepared by Melt SpinningJapanese Journal of Applied Physics, 1988
- Aluminum-Based Amorphous Alloys with Tensile Strength above 980 MPa (100 kg/mm2)Japanese Journal of Applied Physics, 1988