Formation and stability of aluminum-based metallic glasses in Al-Fe-Gd alloys

Journal Article · Tue Nov 01 00:00:00 EST 1988 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/S0036-9748(88)80290-4· OSTI ID:6001462

He, Y; Poon, S J; Shiflet, G J

Metallic glasses, a class of amorphous alloys made by rapid solidification, have been studied quite extensively for almost thirty years. It has been recognized for a long time that metallic glasses are usually very strong and ductile, and exhibit high corrosion resistance relative to crystalline alloys with the same compositions. Recently, metallic glasses containing as much as 90 atomic percent aluminum have been discovered independently by two groups. This discovery has both scientific and technological implications. The formability of these new glasses have been found to be unusual. Studies of mechanical properties in these new metallic glasses show that many of them have tensile strengths over 800MPa, greatly exceeding the strongest commercial aluminum alloys. The high strengths of aluminum-rich metallic glasses can be of significant importance in obtaining high strength low density materials. Therefore, from both scientific and technological standpoints, it is important to understand the formation and thermal stability of these metallic glasses. Al-Fe-Gd alloys were chosen for a more detailed study since they exhibit high tensile strengths.

• Research Organization: Univ. of Virginia, Charlottesville, VA (US)
• OSTI ID: 6001462
• Journal Information: Scr. Metall.; (United States), Vol. 22:11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
METALLIC GLASSES
DUCTILITY
TERNARY ALLOY SYSTEMS
CORROSION RESISTANCE
ALUMINIUM BASE ALLOYS
GADOLINIUM ALLOYS
IRON ALLOYS
MECHANICAL PROPERTIES
STABILITY
THERMAL EXPANSION
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
EXPANSION
RARE EARTH ALLOYS
TENSILE PROPERTIES
360103* - Metals & Alloys- Mechanical Properties
360603 - Materials- Properties
360105 - Metals & Alloys- Corrosion & Erosion
360604 - Materials- Corrosion
Erosion
& Degradation