Through thickness property variations in friction stir welded AA6061 joint fatigued in very high cycle fatigue regime
Source abstract
Abstract
Abstract Ultrasonic fatigue tests were performed on friction stir welded AA6061 joint to investigate very high cycle fatigue (VHCF) behaviors. As a result, almost all the fatigue cracks are initiated from local plastic slip markings around the boundary between thermo-mechanically affected zone and heat affected zone. The fatigue strength decreases from the top to root of the welded joint, owing to the variation of plastic deformation history and temperature distribution through the thickness. In fractography, the fatigue crack initiation site is surrounded by a semicircular flat zone, of which the formation in VHCF regime accounts for more than 98% of the total fatigue life.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Metal Forming Simulation Techniques · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Gigacycle fatigue behavior of high strength aluminum alloys
2. Friction stir welding and processing10.1016/j.mser.2005.07.001 ↗
3. How and why the fatigue S–N curve does not approach a horizontal asymptote10.1016/S0142-1123(01)00123-2 ↗
4. Residual stresses and high cycle fatigue properties of friction stir welded SiCp/AA2009 composites10.1016/j.ijfatigue.2013.05.010 ↗
5. Statistical analysis of high-cycle fatigue behavior of friction stir welded AA5083-H32110.1007/s11665-010-9725-y ↗
6. Fatigue crack growth rate behaviour of friction-stir aluminium alloy AA2024-T3 welds under transient thermal tensioning10.1016/j.matdes.2013.02.081 ↗
7. Fsw – characteristic flaws in aluminium alloys joints
8. The deformation and ageing of mild steel: III discussion of results10.1088/0370-1301/64/9/303 ↗
9. Fatigue damage evaluation of low-alloy steel welded joints in fusion zone and heat affected zone based on frequency response changes in gigacycle fatigue10.1016/j.ijfatigue.2013.10.018 ↗
10. Effect of inclusion on subsurface crack initiation and gigacycle fatigue strength10.1016/S0142-1123(02)00037-3 ↗
11. Very high cycle fatigue of copper: Evolution, morphology and locations of surface slip markings10.1016/j.ijfatigue.2014.01.007 ↗
12. Microstructural fatigue mechanisms: cyclic slip irreversibility, crack initiation, non-linear elastic damage analysis10.1016/j.ijfatigue.2012.06.007 ↗
13. Specific features and mechanisms of fatigue in the ultrahigh-cycle regime10.1016/j.ijfatigue.2005.05.018 ↗
14. Very high cycle fatigue behavior of a low strength welded joint at moderate temperature10.1016/j.ijfatigue.2012.01.014 ↗
15. Fatigue crack initiation detection by an infrared thermography method10.1111/j.1460-2695.2009.01410.x ↗
16. Fatigue crack growth from small to long cracks in VHCF with surface initiations10.1016/j.ijfatigue.2007.03.015 ↗
17. Microstructural evolution of 6063 aluminum during friction-stir welding10.1007/s11661-999-0251-1 ↗
18. Microstructural investigation friction stir welded 7050–T651 aluminium10.1016/S1359-6454(02)00449-4 ↗
19. Tensile properties of a friction stir welded magnesium alloy: effect of pin tool thread orientation and weld pitch10.1016/j.msea.2010.06.012 ↗
20. Comparative study on local and global mechanical properties of 2024 T351, 2024 T6 and 5251 O friction stir welds10.1016/j.msea.2005.09.032 ↗
21. The constitutive behavior of laser welds in 304L stainless steel determined by digital image correlation10.1007/BF02586221 ↗
22. Dissipative and microstructural effects associated with fatigue crack initiation on an Armco iron10.1016/j.ijfatigue.2013.02.009 ↗
23. A TEM study of precipitation and related microstructures in friction-stir-welded 6061 aluminium10.1023/A:1004385928163 ↗
24. Effects of peening on mechanical properties in friction stir welded 2195 aluminum alloy joints10.1016/j.msea.2008.03.017 ↗
25. Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061–T6 friction stir weld10.1007/s10853-009-3868-y ↗
26. Propensities of crack interior initiation and early growth for very-high-cycle fatigue of high strength steels10.1016/j.ijfatigue.2013.02.023 ↗
27. Effect of carburizing treatment on the “fish eye” crack growth for a low alloyed chromium steel in very high cycle fatigue10.1016/j.msea.2012.09.025 ↗
28. Subsurface crack initiation and propagation mechanism under the super-long fatigue regime for high speed tool steel (JIS SKH51) by fracture surface topographic analysis10.1299/jsmea.49.1 ↗
29. Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region10.1016/j.msea.2011.06.001 ↗
30. Mechanisms of strain localization, crack initiation and fracture of polycrystalline copper in the VHCF regime10.1016/j.ijfatigue.2009.03.016 ↗
31. Coupling effect of plasticity, thermal dissipation and metallurgical stability in ultrasonic fatigue10.1016/j.ijfatigue.2013.06.004 ↗
32. Very high cycle fatigue behaviour of austenitic stainless steel and the effect of strain-induced martensite10.1016/j.ijfatigue.2009.05.007 ↗
33. Stress intensity factors for semicircular cracks. 2. Semi-infinite solid10.1115/1.3607862 ↗
34. Service load fatigue damage – a historical perspective10.1016/S0142-1123(99)00054-7 ↗
35. The behavior of cracks in elastic–plastic materials under plane normal and shear loadings10.1007/BF00032524 ↗