@inproceedings{5d66e88ae3fa4adaa504c010a7fd34a3,
title = "Microstructure and crack propagation in Ti-3Al-8V-6Cr-4Mo-4Zr",
abstract = "Fatigue crack growth in air and in aqueous 3.5% NaCl as well as fracture toughness have been evaluated for the metastable β-titanium alloy Ti-3Al-8V-6Cr-4Mo-4Zr in various microstructural conditions. Two solution heat treatments (SHT), 800°C and 927°C, were chosen to produce two different grain sizes. Approximately 20 vol.% unrecrystallized β grains remained after SHT at the lower temperature. Yield stresses were 895 and 850 MPa, respectively. Both simplex and duplex aging treatments were performed for both grain sizes to vary the distribution of α precipitates while keeping the yield stress in the range of 1075-1220 MPa for all aged conditions. Fatigue crack paths tended to be more tortuous in as-SHT material. Unaged material exhibits slightly better da/dN-ΔK behavior (at R=0.1) and significantly higher fracture toughness levels than aged material. The unrecrystallized regions were associated with a loss in ductility and toughness.",
author = "Krugmann, {H. E.} and Gregory, {J. K.}",
year = "1991",
language = "English",
isbn = "0873391306",
series = "Proc Symp Microstruct Prop Relat Titanium Aluminides Alloys Presented 90 TMS Fall Meet",
publisher = "Publ by Minerals, Metals & Materials Soc (TMS)",
pages = "549--561",
booktitle = "Proc Symp Microstruct Prop Relat Titanium Aluminides Alloys Presented 90 TMS Fall Meet",
note = "Proceedings of the Symposium on Microstructure/Property Relationships in Titanium Aluminides and Alloys presented at the 1990 TMS Fall Meeting ; Conference date: 07-10-1990 Through 11-10-1990",
}