Accession Number:

ADA564634

Title:

Novel Nanostructured Magnesium Composites for Lightweight Structural Application

Descriptive Note:

Final rept. 24 Nov 2010-24 Jun 2011

Corporate Author:

MATSYS INC STERLING VA

Personal Author(s):

• Zahrah, Tony F.
• Rowland, Rod

Report Date:

2011-06-24

Pagination or Media Count:

25.0

Abstract:

MATSYS initiated the development of novel compositions and processing techniques to produce lightweight, high-strength, nanostructured, Mg-based composites for structural applications. We used MA of a mixture of Mg or Mg alloy and reinforcement to synthesize a nanostructured composite powder with the reinforcement uniformly dispersed within the nanocrystalline metal matrix. These powders are then consolidated to full density by instrumented-HIP to produce nanostructured composites. The goals is to quantify the relationship between the amount of reinforcement and the resulting composite properties and tailor the process to balance the requirements for strength and ductility. To date we demonstrated that the tensile strength of nanostructured Mg is 58 higher than the coarse-grained material. The temperature required to achieve full densification has been reduced as a result of the microstructure refinement. We demonstrated the use of MA and instrumented-HIP to achieve the desired nanostructure in a fully dense material.

Descriptors:

• *COMPOSITE MATERIALS
• *MAGNESIUM ALLOYS
• *REINFORCEMENT(STRUCTURES)
• DENSITY
• DISPERSING
• HIGH DENSITY
• MAGNESIUM
• MATERIALS
• MATRIX MATERIALS
• METALS
• MICROSTRUCTURE
• NANOSTRUCTURES
• REFINING
• STRUCTURAL PROPERTIES
• TEMPERATURE
• TENSILE STRENGTH

Subject Categories:

• Laminates and Composite Materials
• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE