@article{oai:ynu.repo.nii.ac.jp:00003988,
 author = {Yokoyama, Hisanaga and Umezawa, Osamu and Nagai, Kotobu and Suzuki, Takashi and Kokubo, Kunio},
 issue = {11},
 journal = {Metallurgical and materials transactions. A, Physical metallurgy and materials science},
 month = {Nov},
 note = {application/pdf, To clarify the internal fatigue crack generation in a Ti-Fe-O (near α-type) alloy, microstructures, internal fatigue crack initiation sites, and dislocation structures in samples fractured during high-cycle fatigue tests at liquid nitrogen temperature were studied. The alloy contained two kinds of elongated α-phase microstructures, i.e., recovered α grains and recrystallized α grains. Untested samples contained mobile dislocations in recovered αgrains, but in recrystallized α grains, any dislocations were observed. Internal crack initiation sites were formed transgranularly and were related to the recrystallized α grain region, judging from their morphology, size, and chemistry. Dislocations in revovered α grains were rearranged after cyclic loading in either {0110}-<1120> planar arrays or subgrain structures due to dislocation annihilation. Few dislocations were seen in recrystallized α grains. We discuss the relationship between localized strain incompatibility due to coplanar arrays in recovered α grains and transgranular cracking in recrystallized α grains, and propose a model for fatigue crack generation.},
 pages = {2793--2805},
 title = {Cyclic deformation, dislocation structure, and internal fatigue crack generation in a Ti-Fe-O alloy at liquid nitrogen temperature},
 volume = {31},
 year = {2000}
}