Tittle

Experimental characterization, understanding and modelling of behaviour under different thermomechanical loads of two grades of aluminium alloy, one for additive manufacturing and one for shaping processes application.

Objectives

The goal is to identify and model the mechanisms governing the evolution of the texture and microstructure of two grades of aluminium alloy according the thermomechanical loads.

Host institution

Luleå tekniska universitet in Sweden

Job offer

The goal is to identify the mechanisms governing the evolution for plastic response covering a wide range of temperature strain and strain rates. The ESR2 will have to study among other things: phases transformations, recrystallization and grain growth during hot deformation of two grades of aluminium commonly used in additive manufacturing and shaping processes.

The work requires basic thermo-mechanical characterisation, as literature data is scarce. ESR2 must be able to establish connections between the various material thermal and mechanical effects. He/she will calibrate the material parameters from observations of the microstructure and the overall response of high strain rate tensile tests, the Split-Hopkinson pressure bar test and the quick torsion test, in order to study the influence of different heat treatments and different hot deformations on the kinetics of the allotropic phase transformation. The ESR2 will have access to the advanced microstructural characterization equipment of the UBx, MAT, UPV-EHU and LTU laboratories to conduct accuracy characterizations (measuring bench, microscopy, EBSD, dilatometry, differential scanning calorimetry, gleeble ...).

In the light of these observations, a complete and accurate analysis of the material’s structural evolution during the deformation process will help identify the different mechanisms involved according to the material studied (adiabatic shear bands, grain size, recrystallization, phases changes etc.).

The role of the ESR2 within the ENABLE project will be central. She/he will have to work in perfect coordination with the ESRs of the other work packages. ESR2 will propose constitutive models in high strains especially for ESR3 focused on dynamic recrystallization (DRX) and for ESR8 focused on friction stir welding (FSW). ESR2 will study the effect of the high strain rates for ESR7 specially the adiabatic shear bands formation which occurs during the machining. ESR2 will assist ESR9 in establishing a model for solidification of materials in the melt pool commonly observed in additive manufacturing (AM).

Finally, these experimental approaches will be the basis for the modelling work which will be carried out in close cooperation with ESR4 and ESR5 (WP2/Finite-Element). The experimental data obtained by ESR2 will constitute the calibration base for the microstructural modelling developed by ESR4.

Collaboration

Secondment

10 months across Europe

• 5 months MAT (Fr) (09/2019-01/2020)
• 1 month UBx (Fr) (02/2020)
• 2 months SVK (Sw) (03/2020-04/2020)
• 2 months GKN (05/2020-06/2020)

Timeline

Qualifications

• Excellent master degree in mechanical engineering, material science, physical measurement or related disciplines.
• Strong interest in material science and working knowledge in the field of metallic alloys, fields measuring.
• Significant laboratory experience in the design, synthesis and characterization (crystallographic phase analysis, electron microscopy, surface analysis) of metallic materials, numerical modelling.
• Familiarity with lab equipment, including chemical handling procedures and attention to detail as well as environmental, health and safety (EHS) requirements.
• Excellent communication skills and willingness to work in collaborative projects with multiple partners.
• Very good English language skills.
• Self-motivation and the ability to achieve goals independently as well as to contribute effectively to the team.

apply for this job

• Send your CV and a cover letter to the following address:

ESR2-APPLICATION@ENABLE-PROJECT.COM

• Please put in the object of your email that your are applying for the ESR2 position.
• Please check that you meet all eligibility criteria.