Abstract
Effects of restricted slip conditions on both Taylor factor and plastic strain energy under the condition of tensile yielding have been analyzed in α-titanium alloys at low temperature, using full constraints model. Role of secondary slip systems, i.e. ‹a› basal slip and ‹c+a› pyramidal slip, was clarified, when prismatic slip was dominant. Although no influence of secondary slip conditions on Taylor factor was detected, the plastic strain energy was sensitive to the operating secondary slip systems. When the basal system was chosen as secondary slip, the energy increased in all tensile axes, especially around ‹0001›. In addition, no basal slip operation decreased the plastic strain energy. In the tensile axis around ‹0001› , the plastic strain energy was the highest and the operation of ‹c+a› pyramidal slip was necessary. High elastic strain energy, therefore, must be accumulated to a high level around ‹0001›, since pyramidal slip can be hardly active because of its very high critical resolved shear stress.
