Low-Cycle Fatigue Behavior and Fracture Characteristics of Low-Cost Ti-2Fe-0.1B Alloy

In recent decades, the effect of Fe element addition on titanium alloy has been investigated extensively due to development low-cost alloys, as well B microalloying, which could decrease grain size alloys during casting process. As a key structural material, study fatigue behavior is crucial and always attractive for scientists. Hence, in this paper, low cycle (LCF) fracture characteristics Ti-2Fe-0.1B with lamellar structure were systematically, five different strain amplitudes (Δεt/2) range from 0.6% 1.4% selected control LCF It was found that exhibits continuous cyclic softening whole at Δεt/2 ≤ 1.2%, while = 1.4%, it slight hardening initial stage cycle, then shows softening. Compared pure other typical indicated maximum life under same amplitude, can be attributed fine result trace B, hinder dislocation movement crack propagation.