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

Autor:	Xingchen Yan, Shuo Yin, Chaoyue Chen, Richard Jenkins, Rocco Lupoi, Rodolphe Bolot, Wenyou Ma, Min Kuang, Hanlin Liao, Jian Lu, Min Liu
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Selective laser melting (SLM) additive manufacturing nanocrystalline fatigue resistance TEM characterisation Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 8, Pp 327-333 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
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:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/799268fb96104b10b03c006c24030e4b Zobrazit plný text záznamu View record in DOAJ