The influence of temperature and strain rate on the flow stress and work hardening rate of a 7075 aluminum alloy was studied under compressive loading over the temperature range from 23 degrees C to 470 degrees C, and strain rates from 0.001 s(-1) and 2100 s(-1). While the temperature dependence of the flow stress was found to be most significant at temperatures below 300 degrees C, the strain rate dependence of the flow stress was found to be pronounced at temperatures above 23 degrees C. Concurrently, the work hardening rate decreases significantly with increasing temperature between 23 degrees C and 300 degrees C and increases slightly at higher temperatures. The minimum work hardening rate is observed to occur at temperatures between 200 degrees C and 300 degrees C and shift to higher temperatures with increasing strain rate. A negative strain rate dependence of work hardening rate was observed at 23 degrees C, although a positive strain rate dependence of work hardening rate occurs at higher temperatures. Analysis of the experimental data revealed three deformation regimes.