University West is offering a PhD Studentship in Production Technology - Specializing in Weldability of Ni-based Superalloys
Research in The Division of Welding Technology in the Department of Engineering Science focus around three main areas in relation to welding technology; Metallurgy, Process physics modelling, and Process development and control.
Our main aim is to fundamentally study and improve understanding of welding processes and its influence on the materials. In a new project in cooperation with Swedish industry we seek a PhD student for a position at University West.
The scientific work in the project
Efficient and successful production and joining of precipitation hardening Ni-base superalloys requires precise control of processes and in depth understanding of relations between composition, processing thermal cycles and resulting microstructures as these control properties. This is true both for superalloy production using primary melting, rolling and heat treatment as well as component production with welding. Fabrication by welding using arc or laser adds to complexity to a component by introducing local variations in thermal cycles resulting in an inhomogeneous microstructure making control and prediction of microstructures and properties even more complex. It is therefore of outmost importance to understand the metallurgy and corresponding weldability of the specific material.
In the welding technology group, there are a number of ongoing and recent projects dealing with both production and welding of Ni-based superalloys. Techniques to control and monitor thermal cycles have been developed which together with instruments and software for evaluation and modelling of thermal cycles and microstructures provide unique possibilities to study these versatile but complex materials. With access to a state-of-the-art SEM-EBSD, Varestraint testing equipment, Gleeble Thermomechanical testing equipment, Arc Heat Treatment equipment, hardness mapping facilities as well as relevant software for modelling and thermodynamic calculations it is possible to both apply well-designed experiment to investigate the microstructure and corresponding weldability behavior.
Problems and materials would initially be selected from ongoing projects on superalloys. Focus will be mainly on precipitation hardening Ni-based superalloys, but complementary studies should also be made on other grades.
Potential research questions include:
- Influence of pre-weld heat treatments on hot cracking using arc or laser welding,
- influence of post weld heat treatment on strain age cracking,
- microstructure evolution during welding and heat treatment,
- microstructure evolution and its influence on mechanical properties.
PhD degree program: Production Technology
Research center: Doctoral students in Production Technology become members of the research group PTW (Production Technology West). The group collaborates with the engineering industry in the region at the Production Technology Centre, which houses an advanced research laboratory. For more information about our research center, go to: https://www.hv.se/en/research/research-education/production-technology/
Qualification requirements: Read 3.1 and 3.2 in General syllabus for the third-cycle programme in Production Technology, Ref. No 2015/1343 B 25: https://www.hv.se/en/research/research-education/courses/production-technology/
Selection: : The basic factor for selection from among qualified applicants is the ability to profit from such a program. For more information please read 3.3 in General syllabus for the third-cycle programme in Technology in Production Technology, Ref. No 2015/1343 B 25.
Qualifications of merit for this position (please upload supporting documentation):
- Master of Science (or equivalent level) in Material Science or equivalent
- Knowledge of welding (metallurgy and processes)
- Good knowledge of superalloys in general and precipitation hardening Ni-based superalloys in particular
- Experience in material- and property characterization
- Experience of microstructural characterization using techniques such as SEM, XRD, TEM etc is regarded as a merit
- Good understanding of material affecting issues during processing and production
- Experience of modelling and thermodynamical calculations is a merit
- Experience of research work and scientific writing (prior publications in the subject is regarded as a merit)
- Willingness to travel and perform experiments outside of University West if needed
- Ability to communicate orally and in writing in English (documented)
- Ability to communicate in Swedish is regarded as a merit
Applications are to be submitted electronically through the University West web-based recruitment tool, MyNetwork. Go to https://www.hv.se/en/meet-university-west/job-opportunities/.
The application must include:
- CV/Personal qualifications
- Personal letter containing: - Interest in the research topic. - Previous experience regarding the proposed research topic and its research methods and scientific theories. - Motive to pursue Doctoral studies.
- Degree project of second level of higher education
- Degree certificate of first and second level of higher education
- Other documents which the applicant wishes to invoke