Unique metallic glass formability and ultra-high tensile strength in Al-Ni-Fe-Gd alloys

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90064-Y· OSTI ID:6302576

He, Y; Poon, S J ^[1]; Dougherty, G M; Shiflet, G J ^[2]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Physics
2. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science

The metallic glass formability of aluminum-rich Al-Ni-Fe-Gd alloys has been systematically investigated. The critical cooling rate required to form an amorphous state in this system is generally low, and comparable to that of some of the best metallic glass formers, such as Pd-Cu-Si. Amorphous ribbons up to 0.25 mm thick can easily be produced by the single-roller melt-spinning technique. Tensile strengths as high as 1280 MPa and Young's modulus of 75 GPa have been obtained. Bulk amorphous alloys with good mechanical properties are optimized in Al[sub 85]Ni[sub 6]Fe[sub 3]Gd[sub 6]. DSC and DTA studies reveal that the glass formability is unique for Al-based alloys because the reduced glass temperature T[sub rg] for Al-Ni-Fe-Gd can be as low as 0.44. This is much lower than conventional theory would suggest for easy glass forming systems. A mechanism for the unusual glass formability is suggested.

• OSTI ID: 6302576
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 41:2; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
TENSILE PROPERTIES
GADOLINIUM ALLOYS
IRON ALLOYS
METALLIC GLASSES
CRYSTALLIZATION
NICKEL ALLOYS
AMORPHOUS STATE
PHYSICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
RARE EARTH ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies