Rapid Laser Heating of Metals under Constant Uniaxial Stress.
Abstract
This experimental program examined the strength-temperature relationship of four metals subjected to rapid laser heating. The materials studied were 6Al4V annealed titanium alloy, 304 annealed stainless steel, AZ-31B hard rolled magnesium, and 2024 age-hardened aluminum. A 200-watt CO2 laser heated the metal samples while they were being held under a constant uniaxial tensile stress. The heating times ranged from 0.1 second to several seconds while the heating rates varied from 0.25 to 1.9 times the metals' melting temperature in degrees centigrade per second. Sample yield was defined as a 0.2 percent offset in excess of the laser-induced thermal expansion. In general, the samples heated rapidly by the laser show higher yield temperatures than their conventional long soak counterparts, an effect caused by inertial mechanical and metallurgical properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0900865
Entities
People
- Keith G. Gilbert
- Ron Reinke
Organizations
- Air Force Research Laboratory