Abstract
In this paper, a series of tests are conducted to clarify viscoplastic deformation of Ti-6Al-4V Pure tensile tests with several strain rates, creep tests, stress relaxation tests and uniaxial ratchetting tests are chosen for the purpose. Moreover, cyclic tension-compression loading is also performed. The test results show that Ti-6Al-4V has viscoplastic deformation, and large creep, stress relaxation and ratchetting strain occur in spite of the small stress rate effect of the pure tension. Particularly, the large creep strain and ratchetting strain occur though the stress levels for creep tests and maximum stresses for ratchetting tests are lower than the yield stress.
