Microstructure and mechanical properties of precipitation-hardened aluminum under high rate deformation. [6061-T6]

Conference · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6734671

Grady, D E; Asay, J R; Rohde, R W; Wise, J L

In recent years the shock deformation properties of a precipitation-hardened aluminum alloy (6061-T6) have been investigated extensively with time-resolved wave-profile gauges. Studies have revealed complicating features of the shock-deformation process not easily explained by existing theories of plastic deformation. Specifically, unusual behavior in the dynamic hardness or strength, post-shock hardness, steady wave viscosity, and post-shock microstructure has been observed over the shock pressure range of 1 to 15 GPa. The deformation structure suggests that microscopic heterogeneity in the deformation and temperature state during dynamic compression may be responsible for the observed effects. We have undertaken a study to correlate the shock compression and quasistatic deformation of 6061-T6 aluminum. Recovered specimens which have been shock loaded are examined metallurgically, and results are compared with both static and dynamic mechanical-property measurements. Illuminating correlations are emerging from this study, although an unambiguous determination of the importance of heterogeneous effects is yet to be achieved. A modeling effort of dynamic deformation in aluminum based on heterogeneous deformation and adiabatic thermal trapping is being pursued. 7 figures.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6734671
• Report Number(s): SAND-82-1627C; CONF-820725-3; ON: DE83002870
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
COLD WORKING
COMPRESSION
CRYSTAL STRUCTURE
DEFORMATION
FABRICATION
HARDENING
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROSTRUCTURE
PRECIPITATION HARDENING
SHOCK WAVES