CREATE – Creep and dwell-fatigue in AM Ni-base alloys

Purpose and goal:

The goal of the project is to understand the significant differences in crack propagation properties, during dwell time, at high temperatures for AM printed IN718 compared to materials that are forged or cast. The transition from the conventional production methods to additive manufacturing has several advantages, but also need a greater understanding in order to manufacture products with equally good, or better, mechanical properties.

Expected results and effects:

The project will involve an increased implementation of AM materials and will also be of interest to a wider research group by increasing knowledge and driving the field forward, as well as contributing to collaborations between industry and academia. Another effect of the project is to maintain and develop competence and interest in high-temperature integrity, an aspect which, due to high costs, has, in Sweden, seen a steady decrease in interest in recent years.

Approach and implementation:

The project will have a duration of 4-years and will be carried out as a PhD-student project at Linköping University. The student to be recruited will be supported by supervisors from LiU with additional support from the project team at GKN. The project will be divided into five work packages (WPs)

WP1: Project management and dissemination WP2: Material and specimen supply WP3: Mechanical testing WP4: Fractography and material characterization WP5: Analysis of results and material modelling framework development