STATISTICAL TREATMENT OF FRACTURE-TOUGHNESS DATA OF TI-AL-SI-NB ALLOYS

Authors
WITTKOWSKY B PFUFF M DOGAN B SCHWALBE KH WAGNER R
Citation
B. Wittkowsky et al., STATISTICAL TREATMENT OF FRACTURE-TOUGHNESS DATA OF TI-AL-SI-NB ALLOYS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 187(2), 1994, pp. 105-111
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
187
Issue
2
Year of publication
1994
Pages
105 - 111
Database
ISI
SICI code
0921-5093(1994)187:2<105:STOFDO>2.0.ZU;2-9
Abstract
A statistical analysis was applied to the fracture toughness data of b rittle hypoeutectic and eutectic Ti-Al-Si-Nb alloys consisting of the two intermetallic phases (Ti,Nb)(3)(Al,Si) and (Ti,Nb)(5)(Si,Al)(3) wi th differing volume fractions of the silicide phase. Model calculation s were performed using a simple damage mechanical approach that relate s the statistical properties of toughness data to a statistical distri bution of local strengths which accounts for microstructural features of the alloys. The good correlation observed between the experimental findings and the results of the numerical simulations do not support t he ''weakest link'' model as the underlying failure mechanism of britt le Ti-Al-Si-Nb alloys.