THE RELATIONSHIP BETWEEN X-RAY RESIDUAL STRESS NEAR THE CRACK AND CRACK OPENING/CLOSING BEHAVIOR CONTROLLING FATIGUE CRACK PROPAGATION IN Ti-6Al-4V ALLOY
نویسندگان
چکیده
منابع مشابه
Mixed-Mode, High-Cycle Fatigue-Crack Growth Thresholds in Ti-6Al-4V: A Comparison of Large and Small Crack Behavior
There are few experimental results to date describing the crack-propagation threshold behavior of short fatigue cracks under multiaxial loading conditions. To address this need, in the present study, the variation in mixed-mode, high-cycle fatigue-crack growth thresholds with crack size and shape are reported for a Ti-6Al-4V turbine blade alloy, heat treated to two widely different microstructu...
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The role of crack-tip shielding in in ̄uencing mixed-mode (mode I II) fatigue-crack growth thresholds for large, through-thickness cracks in a Ti±6Al±4V turbine blade alloy is examined under high-cycle fatigue loading conditions, i.e., at a loading frequency of 1000 Hz in ambient temperature air for load ratios (Kmin=Kmax) of R 0:1±0.8. Techniques are developed to quantify crack-tip shielding...
متن کاملMixed-mode, high-cycle fatigue-crack growth thresholds in Ti– 6Al–4V: Role of small cracks
There have been few studies to date describing fatigue-crack propagation thresholds under mixed-mode loading conditions in the presence of cracks, that are small as compared to the characteristic microstructural dimensions. To address this need, the variation in mixed-mode, high-cycle fatigue-crack growth thresholds with crack size is reported for a Ti-6Al-4V turbine blade alloy with a fine-gra...
متن کاملEffects of Microstructure on Mixed-mode, High-cycle Fatigue Crack-growth Thresholds in Ti-6al-4v Alloy
A B S T R A C T Effect of microstructure on mixed-mode (mode I II), high-cycle fatigue thresholds in a Ti-6Al-4V alloy is reported over a range of crack sizes from tens of micrometers to in excess of several millimeters. Specifically, two microstructural conditions were exam-inedÐa fine-grained equiaxed bimodal structure (grain size $20 mm) and a coarser lamellar structure (colony size $500 m...
متن کاملMixed-mode, high-cycle fatigue-crack growth thresholds in Ti±6Al±4V I. A comparison of large- and short-crack behavior
Mixed-mode, high-cycle fatigue-crack growth thresholds are reported for through-thickness cracks (large compared to microstructural dimensions) in a Ti±6Al±4V turbine blade alloy with a bimodal microstructure. Speci®cally, the eect of combined mode I and mode II loading, over a range of phase angles b tanÿ1 DKII=DKI from 0° to 82° DKII=DKI 0±7), is examined for load ratios (ratio of minimu...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1998
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.47.9appendix_186