Impression test—A review

Indentation test using a cylindrical indenter with a flat end is now known as impression test. The advantage is its capability to reach a steady state for creep test at constant load and it is possible to compare with the conventional tensile or compression tests. The test is simple and all the temperature and strain rate dependences can be obtained locally from one sample avoiding the sample to sample variations. It became very popular in the last decade. The literature is reviewed here.