Grain size dependence of fatigue properties of friction stir processed ultrafine-grained Al-5024 alloy
Source abstract
Abstract
Abstract The main objective of the present study was to examine the effect of grain size on the fatigue properties of 5024 Al alloy. Two ultrafine-grained (UFG) and one fine-grain microstructures were produced via friction stir processing (FSP). Fatigue properties were investigated using a fully reversible bending fatigue testing machine. Microstructural evolution during fatigue was analyzed by carrying out interrupted fatigue testing with subsequent orientation imaging microscopy. Emphasis was given to grain size on the evolution of deformed structure, intergranular dislocation density, and overall S-N curve. A comparison with literature demonstrates the importance of the processing route to obtain the UFG microstructure. This difference is highlighted through an analysis of Basquin equation parameters. The results indicate that FSP can be utilized as an effective route to obtain stable UFG microstructure. A fractographic study was done to understand the effect of microstructure on fatigue crack initiation and propagation rates. Crack growth rates in stage-II has been compared for the three different grain sizes.
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Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Aluminum Alloys Composites Properties · Metal Forming Simulation Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Exceptional high fatigue strength in Cu-15 at. % Al alloy with moderate grain size10.1038/srep27433 ↗
2. Overview no. 112: the cyclic properties of engineering materials10.1016/0956-7151(94)90493-6 ↗
3. Bulk nanostructured materials from severe plastic deformation10.1016/S0079-6425(99)00007-9 ↗
4. Novel ultra-high straining process for bulk materials—development of the accumulative roll-bonding (ARB) process10.1016/S1359-6454(98)00365-6 ↗
5. Zehetbauer · 2006
6. Synthesis and mechanical behavior of nanostructured materials via cryomilling10.1016/j.pmatsci.2005.04.004 ↗
7. Nanocrystalline Al–Mg alloy with ultrahigh strength and good ductility10.1016/j.scriptamat.2005.09.028 ↗
8. Advances in ultrafine-grained materials10.1016/j.mattod.2013.03.004 ↗
9. Friction stir welding and processing10.1016/j.mser.2005.07.001 ↗
10. Valiev · 2013
11. The effect of friction stir processing on the microstructure and mechanical properties of equal channel angular pressed 5052Al alloy sheet10.1007/s10853-011-5497-5 ↗
12. Horita · 2000 · 155
13. Microstructural evolution and mechanical properties of Cu–Al alloys subjected to equal channel angular pressing10.1016/j.actamat.2008.12.002 ↗
14. Strengthening mechanisms in nanostructured high-purity aluminium deformed to high strain and annealed10.1016/j.actamat.2009.05.017 ↗
15. Critical grain size for change in deformation behavior in ultrafine grained Al–Mg–Sc alloy10.1016/j.scriptamat.2010.11.051 ↗
16. Cyclic deformation and fatigue properties of very fine-grained metals and alloys10.1016/j.ijfatigue.2009.10.007 ↗
17. On the grain-size dependence of metal fatigue: outlook on the fatigue of ultrafine-grained metals
18. Mechanical properties and microstructures of Al-Mg-Sc alloys10.1007/BF02782422 ↗
19. Strengthening mechanisms of an Al-Mg-Sc-Zr alloy10.1016/S1359-6454(02)00258-6 ↗
20. Serration behavior and shear band characteristics during tensile deformation of an ultrafine-grained 5024 Al alloy10.1016/j.msea.2014.08.027 ↗
21. Hall · Proc Phys Soc Sect B · 1951 · 64 · 74710.1088/0370-1301/64/9/303 ↗
22. Thermal stability of friction stir processed ultrafine grained Al Mg Sc alloy10.1016/j.matchar.2012.09.003 ↗
23. Development of a reversible bending fatigue test bed to evaluate bulk properties using sub-size specimens10.1520/JTE101669 ↗
24. Landgraf · 1970
25. Cyclic plastic strain energy and fatigue of metals10.1520/STP43764S ↗
26. Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates10.1016/j.actamat.2010.01.029 ↗
27. Twinning-related microstructural evolution during hot rolling and subsequent annealing of pure magnesium10.1016/j.msea.2009.03.015 ↗
28. Orientation gradients and geometrically necessary dislocations in ultrafine grained dual-phase steels studied by 2D and 3D EBSD10.1016/j.msea.2010.01.004 ↗
29. Fatigue life of fine-grain Al–Mg–Sc alloys produced by equal-channel angular pressing10.1016/S0921-5093(02)00813-4 ↗
30. Universality behind Basquin’s law of fatigue10.1103/PhysRevLett.100.094301 ↗
31. A. Handbook, volume 12: fractography
32. On the correlation between fatigue striation spacing and crack growth rate: a three-dimensional (3-D) X-ray synchrotron tomography study10.1007/s11661-011-0963-x ↗
33. Fractographic measurements of crack-tip closure10.1520/STP36963S ↗
34. Wanhill R, Hattenberg T. Fractography-based estimation of fatigue crack “initiation” and growth lives in aircraft components; 2006.
35. Marker loads for quantitative fractography of fatigue cracks in aerospace alloys
36. Some fractographic contributions to understanding fatigue crack growth10.1016/j.ijfatigue.2017.06.036 ↗
37. The influence of metallurgical structure on the mechanisms of fatigue crack propagation10.1520/STP47230S ↗
38. Effect of microstructure on fatigue life and fracture morphology in an aluminum alloy10.1016/j.scriptamat.2008.11.032 ↗