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Article Dans Une Revue Materials Research Letters Année : 2019

Fatigue strength improvement of selective laser melted Ti6Al4V using ultrasonic surface mechanical attrition

Résumé

Ultrasonic surface mechanical attrition treatment (SMAT) was employed to modify the surface microstructural layer of SLM Ti6Al4V ELI biomedical material to improve the fatigue performance. The SMAT method can introduce a nanostructured layer in the SLM sample surface by imposing high-strain-rate plastic deformation. The nanostructured layer improves the mechanical strength of the SMAT-affected zone and induces compressive residual stress parallel with the surface which suppress the initiation of cracks. As a result, the specimen after SMAT exhibits significantly higher fatigue strength than the non-treated sample in both low- and high-cycling regime. This research demonstrates that surface mechanical attrition treatment (SMAT) is a promising post-processing technology for selective laser melting. SMAT improves the fatigue strength of selective laser melted Ti6Al4V by 100%.

Dates et versions

hal-04149412 , version 1 (03-07-2023)

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Citer

Xingchen Yan, Shuo Yin, Chaoyue Chen, Richard Jenkins, Rocco Lupoi, et al.. Fatigue strength improvement of selective laser melted Ti6Al4V using ultrasonic surface mechanical attrition. Materials Research Letters, 2019, 7 (8), pp.327-333. ⟨10.1080/21663831.2019.1609110⟩. ⟨hal-04149412⟩
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