Low- and high-cycle fatigue resistance of Ti-6Al-4V ELI additively manufactured via selective laser melting: Mean stress and defect sensitivity
Source abstract
Abstract
Abstract Selective laser melting (SLM) is a net-shape AM technology to produce metal parts also for load-carrying applications. The present work is aimed at investigating the fatigue performance of the biomedical titanium Grade 23 (aka Ti-6Al-4V ELI) AMed via SLM. Low and high cycle fatigue tests are carried out on samples that received a low temperature stress-relief treatment. In addition, the effect of selected post processing treatments on the high cycle fatigue response is assessed. Material characterization is complemented with residual stress and microhardness measurements, computed tomography scans, metallographic and fractographic inspections. These experimental analyses served to elaborate an interpretative model accounting for the modifications produced by the post-processing treatments. The results denote the important role exerted by mean and residual stresses as well as defects on the fatigue performance. The relatively low fatigue strength of SLM manufactured parts indicates that further developments in this fabrication route are still necessary to make their mechanical properties competitive with those of traditionally processed components.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Additive Manufacturing and 3D Printing Technologies · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
Show source-provided references
1. Progress in additive manufacturing and rapid prototyping10.1016/S0007-8506(07)63240-5 ↗
2. Rapid manufacturing and rapid tooling with layer manufacturing (LM) technologies, state of the art and future perspectives10.1016/S0007-8506(07)60206-6 ↗
3. Metal additive manufacturing: a review10.1007/s11665-014-0958-z ↗
4. Froes FH, Dutta B. The additive manufacturing (AM) of titanium alloys. In: advanced materials research. Trans Tech Publ; 2014. p. 19–25.10.4028/www.scientific.net/AMR.1019.19 ↗
5. Selective laser melting of biocompatible metals for rapid manufacturing of medical parts10.1108/13552540710776142 ↗
6. Electron beam additive manufacturing of titanium components: properties and performance10.1115/1.4025773 ↗
7. A study of the microstructural evolution during selective laser melting of Ti–6Al–4V10.1016/j.actamat.2010.02.004 ↗
8. Caiazzo F, Cardaropoli F, Alfieri V, Sergi V, Cuccaro L, 2013. Experimental analysis of selective laser melting process for Ti-6Al-4V turbine blade manufacturing. In: XIX international symposium on high-power laser systems and applications XIX international symposium on high-power laser systems and applications, Istanbul (Turkey) 10th to 14th September 2013.10.1117/12.2010577 ↗
9. Next-generation biomedical implants using additive manufacturing of complex, cellular and functional mesh arrays10.1098/rsta.2010.0010 ↗
10. Mechanical properties of open-cell metallic biomaterials manufactured using additive manufacturing10.1016/j.matdes.2013.01.071 ↗
11. Lütjering · 2007
12. An overview on the use of titanium in the aerospace industry10.1016/0921-5093(96)10233-1 ↗
13. Influence of processing on microstructure and mechanical properties of (α+β) titanium alloys10.1016/S0921-5093(97)00778-8 ↗
14. Influence of sharp microstructural gradients on the fatigue crack growth resistance of α + β and near-α titanium alloys10.1111/j.1460-2695.2005.00932.x ↗
15. Microstructure and mechanical behavior of Ti–6Al–4V produced by rapid-layer manufacturing, for biomedical applications10.1016/j.jmbbm.2008.05.004 ↗
16. As-fabricated and heat-treated microstructures of the Ti-6Al-4V alloy processed by selective laser melting10.1007/s11661-011-0731-y ↗
17. Additive manufacturing of strong and ductile Ti–6Al–4V by selective laser melting via in situ martensite decomposition10.1016/j.actamat.2014.11.028 ↗
18. Analytical modelling of residual stress in additive manufacturing10.1111/ffe.12560 ↗
19. In situ characterization of the deformation and failure behaviour of non-stochastic porous structures processed by selective laser melting10.1016/j.msea.2011.07.026 ↗
20. The effect of manufacturing defects on the fatigue behaviour of Ti-6Al-4V specimens fabricated using selective laser melting10.4028/www.scientific.net/AMR.891-892.1519 ↗
21. Effects of defects in laser additive manufactured Ti–6Al–4V on fatigue properties10.1016/j.phpro.2014.08.120 ↗
22. Improvement of fatigue resistance and ductility of TiAl6V4 processed by selective laser melting10.1016/j.jmatprotec.2015.01.025 ↗
23. Anisotropic high cycle fatigue behavior of Ti–6Al–4V obtained by powder bed laser fusion10.1016/j.ijfatigue.2016.04.032 ↗
24. On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: fatigue resistance and crack growth performance10.1016/j.ijfatigue.2012.11.011 ↗
25. On the fatigue properties of metals manufactured by selective laser melting–the role of ductility10.1557/jmr.2014.157 ↗
26. Fatigue performance evaluation of selective laser melted Ti–6Al–4V10.1016/j.msea.2014.01.041 ↗
27. Fatigue performance of additive manufactured TiAl6V4 using electron and laser beam melting10.1016/j.ijfatigue.2016.05.001 ↗
28. Fatigue life of additively manufactured Ti–6Al–4V in the very high cycle fatigue regime10.1016/j.ijfatigue.2016.05.018 ↗
29. Murakami · 2002
30. Low and high-cycle fatigue properties of an ultrahigh-strength TRIP bainitic steel10.1111/ffe.12589 ↗
31. Fatigue and fracture resistance of heavy-section ferritic ductile cast iron10.3390/met7030088 ↗
32. A comparison of fatigue strength sensitivity to defects for materials manufactured by AM or traditional processes10.1016/j.ijfatigue.2016.06.020 ↗
33. Critical assessment of the fatigue performance of additively manufactured Ti–6Al–4V and perspective for future research10.1016/j.ijfatigue.2015.12.003 ↗
34. On the anomalous mean stress sensitivity of Ti-6Al-4V and its consideration in high cycle fatigue lifetime analysis10.1016/j.ijfatigue.2016.07.010 ↗
35. The effect of post-sintering treatments on the fatigue and biological behavior of Ti-6Al-4V ELI parts made by selective laser melting10.1016/j.jmbbm.2017.03.024 ↗
36. Electropolishing of CP titanium and its alloys in an alcoholic solution-based electrolyte10.4012/dmj.27.258 ↗
37. Porosity testing methods for the quality assessment of selective laser melted parts10.1016/j.cirp.2016.04.054 ↗
38. Zanini F, Carmignato S, Savio E. Enhancing CT porosity measurements on metal additive manufactured parts. In: Proceedings of Euspen 17th international conference; Hannover, Germany, 29 May – 2 June 2017.
39. Cyclically induced softening due to low-angle boundary annihilation in a martensitic steel10.1016/j.msea.2005.02.092 ↗
40. Elastic behaviour characterisation of TRIP 700 steel by means of loading–unloading tests10.1016/j.msea.2015.03.050 ↗
41. On the combination of the critical distance theory with a multiaxial fatigue criterion for predicting the fatigue strength of notched and plain shot-peened parts10.1016/j.ijfatigue.2016.08.015 ↗
42. Numerical simulation of residual stress relaxation in shot peened high-strength aluminum alloys under reverse bending fatigue10.1115/1.3184083 ↗
43. Hänel · 2003
44. A stress–strain parameter for the fatigue of metals
45. Statistical analysis of defects for fatigue strength prediction and quality control of materials10.1046/j.1460-2695.1998.00104.x ↗