Materials Science and Engineering
- +61 3 990 55247
- Room 233, Building 70, Clayton Campus
- 1995 PhD University of Birmingham, 1986 MSc Chinese Academy of Sciences, 1983 BSc South-Central University China
Prof Wu’s research interest is in the development of aerospace materials, in particular Ti alloys, and their manufacturing processes. Her key activities include: developing new alloys for specific applications; modifying existing alloys or processing conditions to maximise their performance, characterising microstructure and mechanical properties of Ti alloys in a range of sizes and developing new manufacturing processes to reduce manufacturing costs, whilst meeting mechanical property requirements for individual service conditions.
Professor Xinhua Wu has been involved extensively in Ti and TiAl alloys and in advanced powder processing, in particular for Ti and Ni alloy powders. Her research into alloy developmentand characterisation coversa range of Ti alloys (Ti64, Ti6246, Ti-15-3, Ti-15-3-0.1C, BuRTi, Ti5553…), TiAl (Ti4522XD, Ti46Al8Ta…), NiTi and NiTiCu shape memory alloys, NbSi ultrahigh temperature alloys etc.Her recent activities are mainly on development of innovative manufacturing including laser additive manufacturing and net-shape HIPping (hot isostatic pressing) which are technologies able to produce 3D complex components from their computer designs in one step, thus lead to a reduction in current manufacturing cost by 30-50% and reduction of material wastage by 90% and reduction of lead-time from 24 to 3 months for Ti, Ni, Al and steel structural components.
Her extensive collaboration with European aerospace companies and with European Framework projects typifies her drive and commitment to deliver aerospace-standard materials and processes.
Her recent activitieswith CRC Advanced Manufacturing and Baosteel mark the beginning of her upcoming research collaboration with partners in Pacific region on Ti ingots /forgings and Ti components for aircraft structures.
- F. Wang, Xinhua Wu and D. Clark, On direct laser deposited Hastelloy X: dimension, surface finish, microstructure and mechanical properties, J. Mat. Sci. & Tech., Vol 27, No, 1, 2011, pp 344-356.
- D. Hu and Xinhu Wu, Ductility in cast TiAl alloys, Materials Science Forum, Vol 638-642, 2010, pp 1336-1341.
- K. Zhang, J. Mei, N. Wain, and Xinhua Wu, Effect of Hot-Isostatic-Pressing Parameters on the Microstructure and Properties of Powder Ti-6Al-4V Hot-Isostatically-Pressed Samples, Metallurgical and Materials Transaction A, Vol 41A, 2010, pp 1033-1045.
- H. Jiang, K. Zhang, X.J. Hao, H. Saage, N. Wain, D. Hu, M.H. Loretto and Xinhua Wu, Nucleation of massive gamma during air cooling of Ti46A18Ta, Intermetalllics, Vol 18, 2010, pp 938-944.
- H. Saage, A.J. Huang, D. Hu, M.H. Loretto and Xinhua Wu, Microstructures and tensile properties of massively transformed and aged Ti46Al8Nb and Ti46Al8Ta alloys, Intermetallics, Vol 17, Issues 1-2, 2009, pp 32-38.
- H. Jiang, F.A. Garcia-Pastor, D. Hu, Xinhua Wu, M.H. Loretto, M. Preuss and P.J. Withers, Characterisation of microplasticity in TiAl-based alloys, Acta Materialia, Vol 57, Issue 5, 2009, pp 1357-1366.
- D. Hu, H. Jiang and Xinhua Wu, Microstructures and tensile properties of cast Ti-44Al-4Nb-4Hf-0.1Si-0.1B with refined lamellar microstructures, Intermetallics, 2009, Vol 17, Issue 9, pp 744-748.
- Xinhua Wu, A. Huang, D. Hu and M.H. Loretto, Oxidation-induced embrittlement of TiAl alloys, Intermetallics, Vol 17, Issue 7, 2009, pp 540-552.
- H. Jiang, D. Hu and Xinhua Wu, Thermal stability of the omega phase in Zr-containing TiAl alloys, J. Alloys and Compounds, Vol 475, 2009, pp 134-138.
- A.J. Huang, D. Hu, M.H. Loretto and Xinhua Wu, The formation of grain boundary gamma during cooling of Ti46Al8Nb, Intermetallics, Vol 17, Issue 5, 2009, pp 285-290.
- R. Dicks, F. Wang and Xinhua Wu, The manufacture of a niobium/niobium-silicide-based alloy using direct laser fabrication, Journal of Materials Processing Technology, Vo1 209, Issue 4, 2009, pp 1752-1757.
- F. Wang, J. Mei and Xinhua Wu, Direct laser fabrication Ti6Al4V/TiB, Journal of Materials Processing Technology, Vol 195, 2008, pp 321326.
- M.H. Loretto, A. Huang , D. Hu and Xinhua Wu, Factors influencing the return to equilibrium of quenched beta Ti alloys and of massively transformed TiAl-based alloys, Metall. Trans A. Vol 39A, No 7, 2008, pp 1480-1485.
- Alloy and Process Development, interested in understanding the relationship between composition and microstructure, mechanical properties and their processability for a range of alloys such as Ti64, Ti153, Ti5553, BuRTi, Ti6242, Ti6246 and others such asTiAl, NiTi and NiTiCu shape memory alloys and NbSi.
- The manufacturing processes studied include casting, forging and advanced powder processing. The research ranges from new alloy development to modification of existing commercial alloys or optimisation of their processing conditions to meet mechanical properties required by individual service conditions for applications in aerospace, oil & gas, offshore, automotive, chemical and biomedical industries. The characterisation of microstructure and mechanical properties covers materials from samples to large ingots or billets in tonnage.
- Laser Additive Manufacturing includes selective laser melting (laser powder bed) and direct laser fabrication (blown powder) processes. For the selective laser melting (SLM) the research is focused on the optimisation of process conditions in order to achieve smooth and consistent manufacture of net shape components from their CAD files as well as optimum microstructure and mechanical properties of alloys Al, Ti, Ni and steels. The research also covers optimisation of surface finish, dimension tolerance and elimination or minimisation of cracks or/and defects in the net shape components. The size of rapidly manufactured components using SLM can be up to 600mm in length, mainly for applications in aerospace, oil & gas, offshore, automotive, chemical and biomedical industries. For direct laser fabrication(DLF) (blown powder process), the research is focused on precision-repair of worn-out components, surface modification and manufacturing small batch of net-shape components from their CAD files directly using commercial alloys. The optimisation of process condition is coupled with the optimisation of microstructure and mechanical properties. The materials of interest include Ti, Ni, Steels and the size of the components can be up to 2-4m long. Rapid alloy synthesis using DLF by feeding different elements at different speeds at different locations is aimed to create new alloys 100 times faster and this study covers a wide range of alloys for structural and functional applications.
- Net shape HIPping is used to produce large Ti or Ni net shape components from commercial Ti or Ni alloy powders (up to 4m long and 2m wide) for applications in aerospace, energy, oil & gas and chemical industries. The research includes the optimisation of process conditions for mechanical properties required by individual service conditions and the development of processing route and condition for any alloys required by customers, including those which are normally deemed as un-HIPpable, e.g. Inco718, beta Ti alloys. Characterisation of a wide range of mechanical properties of HIPped alloy powders, such as Ti64, Ti5553 etc. is carried out for samples and for large components and ingots. The reduction of tooling cost through innovative methods aimed at further reducing component production cost for all materials is also of key interest.