Xianyan focuses on fundamentally understanding the fracture mechanisms of central cracks formed in the cross wedge rolling (CWR) process, an innovative metal forming process for manufacturing axisymmetrical stepped shafts widely used in the transport industry. An electronically driven CWR prototype was designed and manufactured to reveal the fracture mechanism under various stress states. The microstructure in high-strength steels was characterised to determine the critical microstructural factor. A physical-based damage model was proposed for predicting the central crack formation, which was validated quantitatively by CWR tests and FE modelling. Her work will help the CWR industry produce high-quality products and advance the scientific development of fracture mechanisms in complex engineering conditions.
Xianyan started her PhD study at Imperial College in 2017, after she completed her MSc study in Automotive Engineering at the Wuhan University of Technology in 2016, followed by a half-year academic visiting at the University of Nottingham.
et al., 2020, The study of central cracking mechanism and criterion in cross wedge rolling, International Journal of Machine Tools and Manufacture, Vol:159, ISSN:0890-6955
et al., 2020, A study on central crack formation in cross wedge rolling, Journal of Materials Processing Technology, Vol:279, ISSN:0924-0136
et al., 2020, Microstructural effects on central crack formation in hot cross-wedge-rolled high-strength steel parts, Journal of Materials Science, Vol:55, ISSN:0022-2461, Pages:9608-9622