AAWSAP DIRD, Metallic Glasses for Aerospace Applications, December 2009

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Contents
Summary.................................................................................................................v
Metallic Glasses...................................................................................................... 1
Structure ............................................................................................................ 1
Processing.......................................................................................................... 2
Glass-Forming Alloys...................................................................................... 2
Casting and Molding ....................................................................................... 4
Joining ........................................................................................................... 5
Foams ............................................................................................................. 5
Thin Films and Coatings ................................................................................. 5
Mechanical Behavior Near Room Temperature ............................................... 5
Stiffness: Elastic Deformation ........................................................................ 6
Strength and Ductility: Plastic Deformation ................................................... 6
Fracture Toughness........................................................................................ 8
Fatigue ........................................................................................................... 9
Wear Resistance........................................................................................... 10
Corrosion and Stress-Corrosion Cracking ..................................................... 10
Mechanical Behavior at Elevated Temperature ............................................. 11
Other Properties: Magnetic, Electrical, Optical, Thermal, and Acoustic ........ 12
Metallic Glass Matrix Composites ......................................................................... 13
Processing and Structure of Composites .......................................................... 13
Ex Situ Composites........................................................................................... 14
In Situ Composites ........................................................................................... 14
Mechanical Properties of Composites ............................................................... 15
Strength and Ductility: Plastic Deformation ..................................................... 16
Fracture and Fatigue ........................................................................................ 16
Aerospace Applications of Metallic Glasses .......................................................... 16
Structural Applications ..................................................................................... 16
Other Applications............................................................................................ 19
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UNCLASSIFIED/ /FOR OFFl&IAL YSE ONLI/