A new impact-tension-compression testing technique based on a one-dimensional elastic-stress-wave theory has been developed. The technique was applied to investigate dynamic response in pure iron. The experimental results of the loading wave agreed well with the theoretical prediction. The stress, strain, and strain rate of a specimen during impact were evaluated with the aid of a stress-wave analysis. A new experimental technique has been developed to investigate the dynamic-hysteresis loop and the dynamic Baushinger effect in materials. It is presently being developed for applications to dynamic-fatigue studies.