Indenter load effects on creep deformation behavior for Ti-10V-2Fe-3Al alloy at room temperature

Indentation creep behavior at room temperature and its mechanism of Ti-10V-2Fe-3Al alloy with dual phase structure were investigated. Micro-indentation creep tests were performed under the maximum indenter load ranging from 1500 mN to 4500 mN and the holding time of 300 s. The effect of indenter load on creep behavior and creep parameters, like creep rate, creep strain rate, indentation stress and creep stress exponent, were analyzed at the steady-state creep. The results revealed that creep parameters exhibited significantly indentation depth dependent. At the secondary stage of creep, creep strain rate and creep rate increased with the increase of maximum indenter load, while creep stress and creep stress exponent exhibited an opposite trend. Especially, creep stress exponent of 7.65 ± 1.25 in power-law creep behavior of Ti-10V-2Fe-3Al alloy, which was consistent with dislocation process, indicated that the secondary stage of creep may be dominated by dislocation climb. Furthermore, experimental data and figures were used to evaluate and comprehend likely creep mechanisms during a micro-indentation scheme of Ti-10V-2Fe-3Al alloy.