Abstract
A dynamic compression test was carried out on sintered Cu and Fe compacts to clarify their deformation behaviour using a drop-hammer testing machine. The results obtained were as follows:
1) At the high strain rate of about 3×102/sec, the sintered Fe compacts showed sharp pseudo-yield points, but pre-strained specimens did not show such pseudo-yield behaviour.
2) For the first impact of Cu compacts, the dynamic load increased gradually with increasing time, but in the subsequent dynamic tests, the load increased abruptly and then became constant.
3) The dynamically-deformed sintered Fe showed upper and lower yield points. On the contrary, the specimens statically deformed showed only single yield point.
