Specialist Subjects:

Titanium alloys
Nickel Manufacture
Grain Boundary Engineering
Semi-solid forming
Additive Layer Manufacturing
Metals Casting
Failure Analysis (Metals)

Chartered Engineer (CEng) – Institute of Materials, Minerals and Mining.

MIMMM status – Full member of the Institute of Materials, Minerals and Mining.


Postgraduate Taught Masters

Microstructural evaluation of joining/repair processes for aerospace applications

Postgraduate Research

  1. Validation of a high integrity joining/repair process for aerospace applications
  2. Thermo-mechanical characterisation of a nickel super alloy
  3. Alternative Joining Techniques for Ti alloys Powder Interlayer Bonding
  4. High Integrity Joining and Repair of Gamma TiAl (2nd Supervisor)
  5. Fatigue Behaviour of Novel Titanium Alloys (2nd Supervisor)

Areas of Expertise

  • Materials
  • Metals
  • Fatigue
  • Microstructure


  1. Bache, M., Davies, H., Davey, W., Thomas, M., Berment-Parr, I. Microstructural Control of Fatigue Behaviour in a Novel a+b Titanium Alloy Metals
  2. Davies, P., Johal, A., Davies, H., Marchisio, S., Davies, H. Powder interlayer bonding of titanium alloys: Ti-6Al-2Sn-4Zr-6Mo and Ti-6Al-4V The International Journal of Advanced Manufacturing Technology
  3. Lavery, N., Cherry, J., Mehmood, S., Davies, H., Girling, B., Sackett, E., Brown, S., Sienz, J., Brown, S., Sienz, J., Lavery, N., Davies, H., Sackett, E. Effects of hot isostatic pressing on the elastic modulus and tensile properties of 316L parts made by powder bed laser fusion Materials Science and Engineering: A 693 186 213
  4. Zhang, L., Belblidia, F., Davies, H., Lavery, N., Brown, S., Davies, D., Brown, S. Optimizing gate location to reduce metal wastage: Co–Cr–W alloy filling simulation Journal of Materials Processing Technology 240 249 254
  5. Eckermann, J., Mehmood, S., Davies, H., Lavery, N., Brown, S., Sienz, J., Jones, A., Sommerfeld, P., Brown, S., Sienz, J., Lavery, N., Davies, H. Computational modeling of creep-based fatigue as a means of selecting lead-free solder alloys Microelectronics Reliability 54 6-7 1235 1242

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  • EG-185 Materials Practicals 1: structure / property links in metals

    This course is designed to provide students with an introduction to the skills necessary to prepare materials for microscopic examination and to conduct standard mechanical tests. The course supports the Level 1 lecture courses, in particular the courses on Introduction to Materials (EG-180) and on Mechanical Properties (EG-184). The emphasis for this module is the development of practical, experimental, and scientific report writing skills.

  • EG-387 Metals: Advanced Manufacturing and Protection

    This module explores the link between fundamental science and advanced materials behaviour. The first section explores the use of computational modelling of the physics involved in many materials processing methods. Specific examples related to solidification and annealing are covered. The second section deals with the detailed chemical reactions occurring during the corrosion of metals, following on to explore methods of prediction and prevention. To extend students¿ ability to design and use materials by linking the engineering use of metalforming processes and chemistry (via design against corrosion).

  • EG-M113 Advanced Manufacturing of Metals

    The module will provide a deeper understanding of the physical principles underlying the processing of near net and net shaped technologies for advanced metal manufacturing. The course will cover casting, semi-solid metal manufacturing (Thixoforming), additive layer manufacturing and Powder Metallurgy for manufacturing. NOTE. Continuous casting methods will not be covered. The areas covered will cross cut the engineering disciplines of advanced manufacturing technology and material science to broaden the technical and industrial context of both conventional and advanced manufacturing for metals.


  • Upscale of a novel powder interlayer bonding repair process for complex Titanium 6-4 parts. (current)

    Other supervisor: Prof Martin Bache
  • TBC (current)

    Other supervisor: Prof Mark Whittaker
  • Fatigue behaviour in novel titanium alloys (current)

    Other supervisor: Prof Martin Bache
  • High Integrity Joining and Repair of Gamma Titanium Aluminides (current)

    Other supervisor: Prof Steve Brown
  • Small scale testing of high `y` nickel based superalloys manufactured by ALM (current)

    Other supervisor: Prof Robert Lancaster
  • Materials and Mechanical Characterisation of Additive Manufactured Alloys for the Nuclear Sector (current)

    Other supervisor: Prof Robert Lancaster
  • Remnant Life Assessment based on the Small Punch Test and the Wilshire Equations (current)

    Other supervisor: Dr Mark Evans
  • Further discussion needed with industrial supervisor to confirm new title. (current)

    Other supervisor: Prof Mark Whittaker
  • Development of a High Integrity Interlayer Joining Technology for High Temperature Aerospace Applications (current)

    Other supervisor: Dr Karen Perkins
  • Powder interlayer bonding of future alloys. (current)

    Other supervisor: Prof Mark Whittaker
  • Thermo-mechanical characterisation of a nickel superalloy. (current)

    Other supervisor: Prof Geraint Williams
  • Investigation into heat treatment of Weartech Co-Cr-Mo alloys (awarded 2019)

    Other supervisor: Prof Martin Bache

Career History

Start Date End Date Position Held Location
2018 Present Associate Professor Swansea University
2015 Present Senior Lecturer Institute of Structural Materials, Swansea University
2011 2015 Senior Technical Manager ASTUTE, Swansea University
2001 2010 Various Technical Roles VALE (Nickel Refinery)
1998 2000 Research Officer Swansea University
1996 1998 Research Assistant Swansea University

Academic History

Date Qualification Location
1996 PhD Swansea University
1993 BEng Materials Engineering Swansea University

External Responsibilities


Fatigue of Titanium alloys
Previous research has focussed upon low temperature dwell sensitivity in Titanium Alloys. During this period I pioneered the technique of Fracture facet orientation determination via Electron Backscatter diffraction (EBSD).  

Current work is focussed upon validation of a powder bonding technology previously developed at Swansea to support generation of a micro-mechanical models.

Investigation into the early stages of the bonding process are being studied using a combination of metallographic and volumetric characterisation methods (e.g. X-ray CT).

Grain Boundary Engineering.

Grain boundary engineering is an approach designed to control the properties of materials by controlling the grain boundary character distribution (GBCD), mainly by promoting a high proportion of so-called special grain boundaries in them. Through a systematic modification of GBCD,  mechanical properties such as strength, ductility, creep, and corrosion resistance can be improved.  Sequential thermomechanical processing (such as mechanical deformation by cold rolling/tensile straining),  followed by mid- or high- temperature annealing has been adopted to optimize microstructures, by increasing the fraction of special grain boundaries and breaking-up the interconnected random grain boundary network.

Research into GBE is now underway for Novel Aerospace alloys.

Semi-Solid Metal Joining.

Joining in the thixotropic state is considered to be an effective alternative joining method to welding because the material is processed when it is in a semisolid state between solidus and liquidus temperatures. Here the material shows thixotropic behaviour. Metal in a thixotropic state has many features such as high softness, good flowability, superb workability, and excellent join ability.

The key potential advantage of the semisolid joining of alloys is that it can avoid many of the problems (deterioration of the fracture toughness, corrosion resistance, and yield strength in the HAZ) because of the fact that the solidification and heat transfer processes are basically different from those of typical welding.

Nickel Manufacture

Ten years’ experience across a range of Departments within the Nickel Manufacturing Industry- Extensive knowledge of Nickel Powders/Pellets manufactured via Carbonyl Process.