Enhancement of fatigue properties of selective laser melting fabricated TC4 alloy by multiple shot peening treatments
Source abstract
Abstract
This study investigated the impact of multiple shot peening (SP) treatments on the surface morphology, microstructure, residual stress and fatigue performance of TC4 alloy manufactured by selective laser melting (SLM). The multiple SP treatments were conducted sequentially using cast steel beads, ceramic beads and glass beads at different peening intensities. In comparison to the conventional single SP process, multiple SP treatments reduced surface roughness and stress concentration coefficient while further increasing the residual compressive stress on the alloy surface. SP significantly enhanced the fatigue life of the alloy by 6.4 to 9.6 times, with a more pronounced improvement observed with multiple SP. Fatigue fracture analysis revealed that the untreated alloy showed multiple fatigue sources which all located on the surface, with surface printing defects acting as potential sites for crack initiation. After SP treatments, all fatigue cracks were initiated beneath the surface. The improved fatigue performance of SLM-formed TC4 alloy could be mainly attributed to the SP-induced surface microstructure refinement and residual compressive stresses. Furthermore, results indicated that, for subsurface crack initiation, the initial cracks primarily stemmed from the fracture of α/α' martensite in the primary β columnar grains.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Surface Treatment and Residual Stress · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (49)
Show source-provided references
1. Deformation and failure mechanisms of Ti–6Al–4V as built by selective laser melting10.1016/j.msea.2019.138456 ↗
2. Study on selective laser melting and heat treatment of Ti-6Al-4V alloy10.1016/j.rinp.2018.07.008 ↗
3. Additive manufacturing of Ti6Al4V alloy: a review
4. Ultra-high specific strength Ti6Al4V alloy lattice material manufactured via selective laser melting10.1016/j.msea.2022.142956 ↗
5. In-situ investigation on fatigue behaviors of Ti-6Al-4V manufactured by selective laser melting10.1016/j.ijfatigue.2019.105424 ↗
6. Fatigue performance evaluation of selective laser melted Ti–6Al–4V10.1016/j.msea.2014.01.041 ↗
7. Comparative study of fatigue properties of Ti-6Al-4V specimens built by electron beam melting (EBM) and selective laser melting (SLM)10.1016/j.matchar.2018.03.028 ↗
8. 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 ↗
9. Additive manufacturing of metals10.1016/j.actamat.2016.07.019 ↗
10. Improvement of fatigue resistance and ductility of TiAl6V4 processed by selective laser melting10.1016/j.jmatprotec.2015.01.025 ↗
11. Fatigue performances of selective laser melted Ti-6Al-4V alloy: influence of surface finishing, hot isostatic pressing and heat treatments10.1016/j.ijfatigue.2018.11.019 ↗
12. Effect of HIP post-processing at 850 °C/200 MPa in the fatigue behavior of Ti-6Al-4V alloy fabricated by Selective Laser Melting10.1016/j.ijfatigue.2022.107097 ↗
13. Microstructural analysis of selective laser melted Ti6Al4V modified by laser peening and shot peening for enhanced fatigue characteristics10.1016/j.matchar.2021.110935 ↗
14. Study of selective laser melting (SLM) Inconel 718 part surface improvement by electrochemical polish ing10.1016/j.matdes.2016.11.103 ↗
15. Investigation of microstructural evolution in a selective laser melted Ti6Al4V alloy induced by an ultrasonic surface rolling process10.1016/j.msea.2019.138696 ↗
16. Fatigue behaviour of PBF additive manufactured TI6AL4V alloy after shot and laser peening10.1016/j.ijfatigue.2021.106536 ↗
17. Residual stress and microstructure evolutions of SAF 2507 duplex stainless steel after shot peening10.1016/j.apsusc.2018.07.182 ↗
18. Surface post-treatments for metal additive manufacturing: Progress, challenges, and opportunities
19. Process dependent porosity and the influence of shot peening on porosity morphology regarding selective laser melted AlSi10Mg parts
20. Evaluation of the residual stress and microstructure character in SAF 2507 duplex stainless steel after multiple shot peening process10.1016/j.surfcoat.2018.03.012 ↗
21. Numerical and experimental analysis of surface roughness generated by shot peening10.1016/j.apsusc.2012.03.111 ↗
22. An analysis of stress concentrations caused by shot peening and its application in predicting fatigue strength10.1111/j.1460-2695.1992.tb01262.x ↗
23. Experimental study on macro- and microstress state, microstructural evolution of austenitic and ferritic steel processed by shot peening10.1016/j.surfcoat.2018.12.097 ↗
24. The effects of microstructural and chemical surface gradients on fatigue performance of laser powder bed fusion AlSi10Mg
25. Effect of solid-state phase transformation on residual stress of selective laser melting Ti6Al4V10.1016/j.msea.2021.141299 ↗
26. Research on the influence of heat treatment on residual stress of TC4 alloy produced by laser additive manufacturing based on laser ultrasonic technique10.1016/j.ultras.2021.106466 ↗
27. Nanoscale surface modification of AISI 316L stainless steel by severe shot peening10.1016/j.matdes.2016.03.162 ↗
28. Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V10.1016/j.msea.2014.07.086 ↗
29. Selective laser melting of Ti6Al4V alloy: process parameters, defects and post-treatments10.1016/j.jmapro.2021.01.009 ↗
30. Selective laser melting of Ti6Al4V alloy: Effect of post-processing on fatigue life, residual stress, microstructure, microhardness and surface roughness10.1016/j.matchar.2022.112571 ↗
31. Effects of conventional shot peening, severe shot peening, re-shot peening and precised grinding operations on fatigue performance of AISI 1050 railway axle steel10.1016/j.ijfatigue.2021.106613 ↗
32. Surface integrity evolution and fatigue evaluation after milling mode, shot-peening and polishing mode for TB6 titanium alloy10.1016/j.apsusc.2016.06.162 ↗
33. Surface roughness and fatigue properties of selective laser melted Ti–6Al–4V alloy components
34. Fatigue behavior of a low-alloy steel with nanostructured surface obtained by severe shot peening10.1016/j.engfracmech.2011.06.011 ↗
35. Competitive effect of residual stress and surface roughness on the fatigue life of shot peened S42200 steel at room and elevated temperature10.1016/j.triboint.2023.108422 ↗
36. Low- and high-cycle fatigue resistance of Ti-6Al-4V ELI additively manufactured via selective laser melting: mean stress and defect sensitivity10.1016/j.ijfatigue.2017.10.021 ↗
37. Goodmant · 1899
38. Subsurface crack initiation during fatigue as a result of residual stresses, Fatig. Fract. Eng10.1111/j.1460-2695.1979.tb00388.x ↗
39. Mechanisms of macrozone elimination and grain refinement of near α Ti alloy via the spheroidization of the Widmannstätten structure10.1016/j.actamat.2023.119339 ↗
40. Determination of surface mechanical property and residual stress stability for shot-peened SAF2507 duplex stainless steel by in situ X-ray diffraction stress analysis10.1016/j.jmrt.2020.05.028 ↗
41. Stability of shot peening induced residual stresses and their influence on fatigue lifetime10.1016/j.msea.2010.09.050 ↗
42. Estimation of residual stress relaxation in low alloy steel with different hardness during fatigue by in situ X-ray measurement10.1016/j.ijfatigue.2023.107989 ↗
43. Effect of shot peening on the surface integrity and fatigue property of gear steel 16Cr3NiWMoVNbE at room temperature10.1016/j.ijfatigue.2023.107668 ↗
44. Fatigue behaviour of notched laser powder bed fusion AlSi10Mg after thermal and mechanical surface post-processing10.1016/j.msea.2021.142145 ↗
45. The effect of laser shock peening, shot peening and their combination on the microstructure and fatigue properties of Ti-6Al-4V titanium alloy
46. Mechanical Properties of AlSi10Mg Produced by Selective Laser Melting10.1016/j.phpro.2012.10.059 ↗
47. On the fatigue strength enhancement of additive manufactured AlSi10Mg parts by mechanical and thermal post-processing10.1016/j.matdes.2018.02.055 ↗
48. Application of gradient severe shot peening as a novel mechanical surface treatment on fatigue behavior of additively manufactured AlSi10Mg10.1016/j.msea.2023.145397 ↗
49. On the effect of shot-peening on fatigue resistance of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting (AM-SLM)