THE MECHANICAL-PROPERTIES OF SINGLE-PHASE GAMMA-TI47AL51MN2 POLYCRYSTALS

The mechanical properties of polycrystalline samples of the single pha se gamma-Ti47Al51Mn2 alloy have been studied during compression tests in a wide range of temperatures (120-1270 K). The flow stress and the work hardening rate are measured during imposed strain rate tests, whi le the strain rate sensitivity of the stress is examined using both st rain rate jumps and stress relaxation experiments. From the temperatur e, strain and stress dependence of these parameters, it is shown that the investigated temperature domain can be divided into three regimes corresponding to different deformation mechanisms. The results are com pared to the data available in the literature and are found to be in g ood agreement with the dislocation structures and dislocation motion m echanisms that we have previously reported. Copyright (C) 1996 Acta Me tallurgica Inc.