High temperature mechanical properties and microscopic examination of extruded powder aluminum

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6260056

Woods, T. O.; Berghaus, D. G.; Peacock, H. B.

The purpose of this work is to examine the high temperature mechanical properties and structure of extruded powder aluminum so that its failure mechanisms can be determined. Specimens made from both extruded 101 ALCOA (Aluminum Company of America) powder aluminum and 1100 commercial aluminum rods were mechanically tested in simple tension, simple compression, pure torsion, and combined tension-torsion and compression-torsion loadings at a test temperature of 350/degree/C. The varied loadings are necessary to analyze material behavior because during extrusion the material is subjected to combinations of tensile, shear, and compressive deformations. Both powder aluminum and 100 aluminum specimens were tested to that stress-strain curves from the two materials could be compared to reveal differences in material properties which are due to the laminary structure of the extruded powder material. During extrusion the powder particles form a laminar structure. This structure consist of elongated particles which are separated by aluminum oxide. The brittle oxide originally coated the pre-extruded particles. 9 refs., 4 figs.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6260056
• Report Number(s): DP-MS-88-213; CONF-8906119-1; ON: DE89010457
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALUMINIUM
COMPRESSION STRENGTH
CRYSTAL STRUCTURE
DEFORMATION
DUCTILITY
ELEMENTS
EXTRUSION
FABRICATION
FAILURES
HIGH TEMPERATURE
MATERIALS WORKING
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
POWDERS
TENSILE PROPERTIES