Effects of laser shock processing on high cycle fatigue crack growth rate and fracture toughness of aluminium alloy 6082-T651
Source abstract
Abstract
Abstract The effects of laser shock processing without protective coating on high-cycle fatigue crack growth and fracture toughness were investigated. Laser shock peening treatment was performed on compact tension specimens from both sides perpendicular to the crack growth direction, followed by subsequent grinding. Fatigue crack growth tests were performed at frequencies between 116 and 146 Hz, at R = 0.1 and a constant stress intensity range during the fatigue crack initiation phase and K-decreasing test. A lower number of cycles was required to initiate a fatigue precrack, and faster fatigue crack growth was found in tensile residual stress field of LSP-treated specimens. The crack growth threshold decreased by 60% after LSP treatment. The fracture toughness decreased by 28–33% after LSP treatment. The fatigue-to-ductile transition boundary on fractographic surfaces show linear fatigue crack fronts in non-treated specimens and curves after LSP treatment.
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Research context
OpenAlex topics: Surface Treatment and Residual Stress · Healthcare and Venom Research · Erosion and Abrasive Machining
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References (36)
Show source-provided references
1. Effects of laser energy on fatigue crack growth properties of 6061-T6 aluminium alloy subjected to multiple laser penning10.1016/j.engfracmech.2013.01.011 ↗
2. The effect of residual stresses arising from laser shock-peening on fatigue crack growth10.1016/j.engfracmech.2010.03.033 ↗
3. Effects of laser peenign with different coverage areas on fatigue crack growth properties of 6061-T6 aluminium alloy10.1016/j.ijfatigue.2012.09.010 ↗
4. Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts10.1016/j.actamat.2010.03.026 ↗
5. Laser and shot peening effects on fatigue crack growth in friction stir welded 7075-T7351 aluminum alloy joints10.1016/j.ijfatigue.2006.05.007 ↗
6. Effects of laser induced shock waves on metals
7. Effects of laser shock peening and groove spacing on the wear behavior of non-smooth surface fabricated by laser surface texturing10.1016/j.apsusc.2014.06.029 ↗
8. Surface modifications induced in 316L steel by laser peening and shot-peening. Influence on pitting corrosion resistance10.1016/S0921-5093(99)00698-X ↗
9. Laser shock processing effects on isothermal oxidation resistance of GH586 superalloy10.1016/j.apsusc.2015.01.033 ↗
10. http://ceas.uc.edu/lspcenter/lspconference.html.
11. Laser shock peening without absorbent coating (LSPwC) effect on 3D surface topography and mechanical properties of 6082-T651 Al alloy10.1016/j.surfcoat.2012.08.048 ↗
12. Characteristis of surface layer formed on Inconel 718 by laser shock peening with and without a protective coating10.1016/j.jmatprotec.2015.06.026 ↗
13. Fatigue in laser shock peened open-hole thin aluminium specimens10.1016/j.msea.2011.12.010 ↗
14. Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061-T6 aluminium alloy10.1016/j.msea.2004.07.025 ↗
15. Effect of laser shock processing on fatigue crack growth of duplex stainless steel10.1016/j.msea.2010.10.020 ↗
16. ASM International. Fatigue. Elements of metallurgy and engineering alloys; 2008 [Chapter 14].
17. Laser shock peening effect on the dislocation transitions and grain refinement of Al–Mg–Si alloy10.1016/j.matchar.2014.08.020 ↗
18. ASTM E399-12e3 · 2012
19. ASTM E837-08 · 2008 · vol. 03.01
20. ASTM E647-05. Standard test method for measurement of fatigue crack growth rates; 2003.
21. Fatigue testing of materials and components under mean load conditions
22. Laser shock processing of aluminium alloys: application to high cycle fatigue behaviour10.1016/0921-5093(95)10084-9 ↗
23. Physics and applications of laser-shock processing10.2351/1.521861 ↗
24. Investigation of the effects of shed-rate, initial Kmax and geometric constrain on ΔKth in Ti-6-Al-4V at room temperature10.1016/S0142-1123(99)00037-7 ↗
25. NASGRO, reference manual, version 4.02., September 2002.
26. Behavior of surface and corner cracks subjected to tensile and bending loads in Ti–6Al–4V alloy
27. Microstructure dependent fatigue crack growth in aged hardened aluminium alloys10.1016/j.ijfatigue.2004.04.004 ↗
28. Ivetic G, Meneghin I, Troiani E, Molinari G, Lanciotti A, Ristori V, et al. ICAF 2011 structural integrity: influence of efficiency and green imperatives 2011, Part 8. p. 855–66.10.1007/978-94-007-1664-3_66 ↗
29. Tensile properties and fracture toughness of heat treated 6082 alloy
30. ASTM B646-12 · 2012
31. ASTM B645-10(2015) · 2015
32. ASM Handbook, Fractography, vol. 12; 1987.
33. Kemp RMJ. Fatigue crack closure – a review. Royal aerospace establishment. Technical report TR 90046, Unlimited. London; 1990. p. 25–8.
34. Grabec · 2000
35. Effects of microstructure on the fatigue crack growth behaviour of light metals and design considerations
36. Broek · 1989