Fatigue and fracture toughness of a Nb-Ti-Cr-Al-X single-phase alloy at ambient temperature

Authors
Davidson, DL Chan, KS Loloee, R Crimp, MA
Citation
Dl. Davidson et al., Fatigue and fracture toughness of a Nb-Ti-Cr-Al-X single-phase alloy at ambient temperature, MET MAT T A, 31(4), 2000, pp. 1075-1084
Citations number
50
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science",Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN journal
10735623 → ACNP
Volume
31
Issue
4
Year of publication
2000
Pages
1075 - 1084
Database
ISI
SICI code
1073-5623(200004)31:4<1075:FAFTOA>2.0.ZU;2-3
Abstract
The fatigue and fracture resistance of a commercially made, single-phase Nb -base alloy with 35 at. pct Ti, 5 at. pct Cr, 6 at. pct Al, and several ele ments to increase solid solution strengthening have been investigated. The threshold for fatigue crack growth was determined to be approximate to 7 MP a root m and fracture toughness approximate to 35 MPa root m. Crack growth was intermittent and sporadic; the fracture path was tortuous, crystallogra phic, and appeared to favor the {100} and {112} planes. Fatigue crack closu re was measured directly at the crack tip. The fatigue and fracture propert ies of the commercial alloy are compared against those of Nb-Cr-Ti and Nb-C r-Ti-Al alloys. The comparison indicated that Ti addition is beneficial for , but Al addition is detrimental to, both fracture toughness and fatigue cr ack resistance.