Biomodal dwell-fatigue Weibull distribution of forged titanium IMI 834

Download
  1. Get@NRC: Biomodal dwell-fatigue Weibull distribution of forged titanium IMI 834 (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1177/1056789514541823
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleInternational Journal of Damage Mechanics
ISSN1056-7895
1530-7921
Subjecttitanium alloy; dwell-fatigue; bimodal Weibull distribution; damage, strain
AbstractThis study addresses cumulative damage and its evolution during the cold dwell fatigue of a near-alpha titanium alloy. An experimental study was undertaken to examine the evolution of life, strain, strength and damage of 13 titanium IMI 834 samples cut from a single disk forging. The samples were tested in the same dwell-fatigue loading conditions. In the dwell phase, the load is maintained at 80% of ultimate tensile strength (824 MPa, 90% of yield strength) for thirty seconds. The secant Young's modulus and inelastic strain at minimum load were measured in order to document the evolution of the irreversible damage against the number of cycles for all specimens. Experimental observations show significant differences in dwell-fatigue life and damage behavior. This mechanical analysis and an analysis of the cumulative Weibull reliability distribution suggest a bimodal dwell-fatigue failure process. Some features of the mechanical behavior can be used to sort the samples according to each of the two failure modes and improve the reliability of the fatigue test campaign.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NRC numberNRC-EME-55664
NPARC number21275984
Export citationExport as RIS
Report a correctionReport a correction
Record identifier9649ccdf-fa27-4b43-834d-31cfe4cca2f7
Record created2015-08-26
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)