High Tensile Strength Bulk Glassy Alloy Zr65Al10Ni10Cu15 Prepared by Extrusion of Atomized Glassy Powder
- 1 January 1996
- journal article
- Published by Japan Institute of Metals in Materials Transactions, JIM
- Vol. 37 (1) , 70-77
- https://doi.org/10.2320/matertrans1989.37.70
Abstract
This paper deals with the first success of producing a bulk Zr–Al–Ni–Cu glassy alloy with the same mechanical properties as those for the as-cast bulky and melt-spun glassy alloys by extrusion of atomized glassy powder in the supercooled liquid region. A Zr65Al10Ni10Cu15 glassy alloy was chosen as the best composition because of the achievement of the lowest viscosity in the supercooled liquid region and an appropriate extrusion temperature (Te) was evaluated to be about 673 K. The temperature-time-transformation (T.T.T.) diagram in the supercooled liquid region was also determined through the measurement of the time up to crystallization at various temperatures. The bulk glassy alloy prepared by extrusion at an extrusion ratio of 5 and Te=673 K has a nearly full density above 99% and the Tg, Tx and ΔHx values are the same as those for the as-atomized glassy powder with a particle size below 150 μm. Furthermore, the extruded bulk alloy also exhibits a tensile strength of 1520 MPa, a Young’s modulus of 80 GPa and a tensile fracture strain of 0.02 which are nearly the same as those for the as-cast bulk and melt-spun glassy alloys. The fracture takes place along the maximum shear plane and the fracture surface consists of a well-developed ruggedness similar to the vein pattern typical for amorphous alloys with good bending ductility. The success of producing the bulk glassy alloy with high tensile strength by the extrusion method seems to be encouraging the future development of the Zr-based glassy alloy.Keywords
This publication has 21 references indexed in Scilit:
- High Strength Bulk Amorphous Alloys with Low Critical Cooling Rates (Overview)Materials Transactions, JIM, 1995
- Preparation of Bulky Amorphous Zr–Al–Co–Ni–Cu Alloys by Copper Mold Casting and Their Thermal and Mechanical PropertiesMaterials Transactions, JIM, 1995
- Preparation of Bulky Zr-Based Amorphous Alloys by a Zone Melting MethodMaterials Transactions, JIM, 1994
- Cu-Rich Cu–Al–Ln (Ln=Ce or Nd) Amorphous AlloysMaterials Transactions, JIM, 1993
- Bulky La–Al–TM (TM=Transition Metal) Amorphous Alloys with High Tensile Strength Produced by a High-Pressure Die Casting MethodMaterials Transactions, JIM, 1993
- Production of amorphous La-Al-Ni and Zr-Al-Ni alloy tubes by a metallic-mould casting methodJournal of Materials Science Letters, 1993
- Mg–Cu–Y Bulk Amorphous Alloys with High Tensile Strength Produced by a High-Pressure Die Casting MethodMaterials Transactions, JIM, 1992
- Mg–Cu–Y Amorphous Alloys with High Mechanical Strengths Produced by a Metallic Mold Casting MethodMaterials Transactions, JIM, 1991
- Al–La–Ni Amorphous Alloys with a Wide Supercooled Liquid RegionMaterials Transactions, JIM, 1989
- Mechanical Strengths, Thermal Stability and Electrical Resistivity of Aluminum-Rare Earth Metal Binary Amorphous AlloysMaterials Transactions, JIM, 1989