Influence of Processing Factors on Stress Relaxation Behavior of TC4 Alloy

The stress relaxation behavior characters of TC4 alloy and influence of processing factors were studied . The results showed that the stress relaxed very fast at the first stage, while slowly at the second stage, and the residual stress approached a limit after a long relaxation time. Stress relaxation was characterized with stress relaxation limit and stress relaxation rate. The higher temperature resulted in higher stress relaxation rate and lower relaxation limit. Different initial stress gave the same relaxation limit at same temperature.