DIC-based studies of the overloading effects on the fatigue crack propagation behavior of Ti-6Al-4V ELI alloy
Source abstract
Abstract
Abstract In this paper experimental correlations between da/dN and ΔK and between a vs. N of an extra-low-interstitial titanium (Ti-6Al-4V ELI) alloy under four typical overload conditions (OL, UL, OL-UL and UL-OL) in an otherwise constant amplitude loading were obtained. By means of the digital image correlation (DIC) technique, the crack-tip deformation fields as well as the crack opening process corresponding to the four overloading patterns were measured. The results shown that both the crack propagation behaviors and the crack-tip strain distributions of the Ti-alloy were greatly influenced by the overloading conditions applied. The effect of the overloading pattern (sequence) on the fatigue crack propagation behavior of the Ti-alloy was then analyzed by combining the crack-tip deformation measurements with the fatigue crack propagation results from three possible mechanisms, i.e., the crack-tip blunting effect, the crack closure effect and crack-tip plastic zone effect. It was found that for the present investigated Ti-6Al-4V ELI alloy, the above three mechanisms made contributions in different extents to the fatigue crack growth retardation behavior.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · High-Velocity Impact and Material Behavior · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. In situ neutron diffraction study of internal strain evolution around a crack tip under variable-amplitude fatigue-loading conditions10.1016/j.scriptamat.2009.01.036 ↗
2. Skorupa M. Load interaction effects during fatigue crack growth under variable amplitude loading - A literature review. Part I: Empirical trends. Fatigue Fract Eng M 1998;21:987-1006. doi: 10.1046/j.1460-2695.1998.00083.x.10.1046/j.1460-2695.1998.00083.x ↗
3. Experimental measurement of crack opening and closure loads for 6082-T6 aluminium subjected to periodic single and block overloads and underloads10.1016/j.ijfatigue.2012.07.010 ↗
4. Changes in crack-opening stress after underloads and overloads in 2024–T351 aluminium alloy10.1016/0142-1123(95)00010-Q ↗
5. Study of underload effects on the delay induced by an overload in fatigue crack propagation10.1016/j.ijfatigue.2007.02.002 ↗
6. Prediction of crack growth under complex loading cycles10.1016/0142-1123(94)90452-9 ↗
7. The significance of fatigue crack closure
8. Synergy of crack closure, near-tip residual stress and crack-tip blunting in crack growth under periodic overloads - A fractographic study10.1016/j.ijfatigue.2016.08.004 ↗
9. Effects of surface deformation and crack closure on fatigue crack propagation after overloading and underloading10.1016/j.ijfatigue.2004.03.017 ↗
10. Separating plasticity-induced closure and residual stress contributions to fatigue crack retardation following an overload10.1016/j.jmps.2016.10.001 ↗
11. Spectrum loading and crack growth10.1115/1.3425362 ↗
12. The importance of compressive stresses on fatigue crack propagation rate10.1016/j.ijfatigue.2005.07.003 ↗
13. Prediction of crack growth in 350WT steel subjected to constant amplitude with over- and under-loads using a modified Wheeler approach10.1016/j.marstruc.2003.10.001 ↗
14. An engineering model of fatigue crack growth under variable amplitude loading10.1016/j.ijfatigue.2007.03.004 ↗
15. Proposed modifications to the Wheeler retardation model for multiple overloading fatigue life prediction10.1016/j.ijfatigue.2005.12.007 ↗
16. Mechanisms of fatigue crack growth retardation following overloads10.1016/0013-7944(83)90051-6 ↗
17. Effect of underloads or overloads in fatigue crack growth by crack-tip blunting10.1016/j.engfracmech.2005.10.009 ↗
18. Neutron diffraction measurements of residual stresses around a crack tip developed under variable-amplitude fatigue loadings10.1111/j.1460-2695.2010.01490.x ↗
19. On crack tip shielding due to plasticity-induced closure during an overload10.1111/j.1460-2695.2010.01439.x ↗
20. Mapping and load response of overload strain fields: synchrotron X-ray measurements10.1016/j.ijfatigue.2009.01.020 ↗
21. Optical and analytical investigation of overloads in biaxial fatigue cracks10.1016/j.ijfatigue.2016.12.035 ↗
22. Characterisation of overloads in fatigue by 2D strain mapping at the surface and in the bulk10.1111/ffe.12463 ↗
23. High resolution analysis of opening and sliding in fatigue crack growth10.1016/j.ijfatigue.2011.11.001 ↗
24. Digital image correlation measurement of near-tip fatigue crack displacement fields: constant amplitude loading and load history effects10.1111/j.1460-2695.2012.01707.x ↗
25. Effect of overload on crack closure in thick and thin specimens via digital image correlation10.1016/j.ijfatigue.2013.07.002 ↗
26. Effects of tensile/compressive overloads on fatigue crack growth behavior of an extra-low-interstitial titanium alloy10.1016/j.ijmecsci.2016.09.014 ↗
27. A study of the back stress and the friction stress behaviors of Ti-6Al-4V alloy during low cycle fatigue at room temperature10.1016/j.msea.2017.06.051 ↗
28. Ncorr: open-source 2D digital image correlation matlab software10.1007/s11340-015-0009-1 ↗
29. Investigation of fatigue crack closure using multiscale image correlation experiments10.1016/j.engfracmech.2009.08.002 ↗
30. Measurement of fatigue crack deformation on the macro- and micro-scale: Uniform and non-uniform loading10.1016/j.ijfatigue.2016.02.032 ↗
31. A fatigue crack driving force parameter with load ratio effects10.1016/S0142-1123(01)00158-X ↗
32. Leser WP, Newman JA, Johnston WM. Fatigue Crack Closure Analysis Using Digital Image Correlation. NASA/TM-2010-216695.
33. An algorithm for evaluating crack closure from local compliance measurements10.1046/j.1460-2695.2002.00444.x ↗
34. Experimental evaluation of crack shielding during fatigue crack growth using digital image correlation10.1111/ffe.12136 ↗
35. Analysis of overload effects and related phenomena10.1016/S0142-1123(99)00094-8 ↗