Effects of Rapid Heating and Cooling on the Hardness and Strength of 2014-T6 and 7050-T6 Aluminum Alloys

摘要

Specimens of 2014-T6 and 7075-T6 aluminum alloys, commonly used in rocket motor tubes, were heated at 165℉ per second to various temperatures and air-cooled, simulating conditions encountered in the firing of a rocket. Hardness was measured immediately after and 100 hours after the heating and cooling cycle. A relationship was thus established from which maximum temperatures of local areas of the fired motor tubes can be estimated from hardness values, High-heating-rate yield strengths of these alloys were plotted on the same graphs with the hardness-versus-temperature curves.