Room-temperature compressive creep behavior of Ti-6Al-4V ELI alloys with basketweave microstructure under an alternating compressive stress

Titanium alloys have great potential as candidate materials for the deep-sea facilities. Long-term creep deformation behavior of pressure-bearing structures made titanium under alternating compressive stress has a direct impact on structural stability. The evaluations Ti-6Al-4V ELI with basketweave microstructure stresses been carried out by uniaxial tester. deformations strong sensitivity due to larger strain higher applied stress. dislocation densities in α and β phases increase stresses. slip multiplication occur accompanying high dislocations density caused deformation. large concentration occurs at grain boundaries α/β phase plug after creep, which causes boundary pinning. is decelerating process controlled <a> slip. slight refinements grains hardening confirmed creeps. synergistic effects multiplication, pinning lead strengthening