2. Department of Mechanical and Manufacturing Engineering Trinity College Dublin The University of Dublin
3. LERMPS ICB UMR RS Université Bourgogne Franche-Comté UTBM,6303 CN
4. National Engineering Laboratory for Modern Materials Surface Engineering Technology The Key Lab of Guangdong for Modern Surface Engineering Technology Guangdong Institute of New Materials
5. Hong Kong Branch of National Precious Metals Material Engineering Research Center Department of Material Science and Engineering City University of Hong Kong
BSTRACTUltrasonic 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.
Abstract
BSTRACTUltrasonic 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.