Accession Number:

ADA564806

Title:

Fabrication and Investigation of Intermetallic Compound-Glassy Phase Composites having Tensile Ductility

Descriptive Note:

Final rept. 22 Feb 2010-22 Feb 2012

Corporate Author:

TOHOKU UNIV SENDAI (JAPAN)

Personal Author(s):

• Louzguine, Dmitri

Report Date:

2012-08-09

Pagination or Media Count:

8.0

Abstract:

The purpose of this research was to produce in-situ ductile crystalline intermetallic compound-glassy composite materials with high strength and good plasticity. A range of composite specimens was prepared Cu-Y, Y-Cu-Ag, Y-Cu-Al, Cu-Y-Ag, Mg-Cu-Y, Mg-Y-Ag, Mg-Y-Zn, Ni-Cu-Ti-Zr using casting and melt spinning techniques. Structure was examined by x-ray diffraction phase transformations were studied by differential scanning and isothermal calorimetry. Crystal-glassy composites formed in Y-Cu-Ag, Y-Cu-Al and Cu-Y-Ag and Ni-Cu-Ti-Zr alloys whereas Mg-based alloys did not smelt well. Ribbon samples of Y-Cu-Ag, Y-Cu-Al and Cu-Y-Ag alloys showed good bending ductility while bulk Ni-Cu-Ti-Zr alloy samples of 2 mm in diameter demonstrated large plasticity owing to martensitic transformation in B2 crystalline phase and TRIP effect. Large deformations up to about 20 were achieved in Ni-Cu-Ti-Zr alloys.

Descriptors:

• *COMPOSITE MATERIALS
• *DUCTILITY
• *INTERMETALLIC COMPOUNDS
• *TENSILE PROPERTIES
• CALORIMETRY
• CRYSTALS
• DEFORMATION
• MAGNESIUM ALLOYS
• MARTENSITE
• MELTS
• PHASE TRANSFORMATIONS
• PLASTIC PROPERTIES
• SCANNING
• SPINNING(INDUSTRIAL PROCESSES)
• TRANSFORMATIONS
• X RAY DIFFRACTION

Subject Categories:

• Inorganic Chemistry
• Laminates and Composite Materials
• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE