Fatigue strength improvement of selective laser melted Ti6Al4V using ultrasonic surface mechanical attrition
Autor: | Shuo Yin, Richard Jenkins, Rocco Lupoi, Min Liu, Jian Lu, Rodolphe Bolot, Xingchen Yan, Hanlin Liao, Chaoyue Chen, Wenyou Ma, Min Kuang |
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Rok vydání: | 2019 |
Předmět: |
Materials science
fatigue resistance 02 engineering and technology 01 natural sciences law.invention law 0103 physical sciences lcsh:TA401-492 medicine Selective laser melting (SLM) General Materials Science Attrition Ti 6al 4v TEM characterisation Composite material 010302 applied physics Titanium alloy 021001 nanoscience & nanotechnology medicine.disease Laser Fatigue limit Nanocrystalline material lcsh:Materials of engineering and construction. Mechanics of materials Ultrasonic sensor nanocrystalline 0210 nano-technology additive manufacturing Layer (electronics) |
Zdroj: | Materials Research Letters, Vol 7, Iss 8, Pp 327-333 (2019) |
ISSN: | 2166-3831 |
DOI: | 10.1080/21663831.2019.1609110 |
Popis: | 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. |
Databáze: | OpenAIRE |
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