Introduction of new Titanium material forms in Containment Structures

Purpose and goal:

The project aims to study how titanium alloys produced with additive manufacturing processes can be used in engine structures with containment requirements. To succeed, both test methods and analysis methods need to be developed. The methods need to handle high strain rates, stress states and temperature effects.

Alloys of interest are Ti-64 as well as Ti-6242, the latter being particularly suitable for higher temperatures. The goal is to be able to manufacture components with a more ´net shape´ and reduced environmental impact, still with maintained flight safety. Expected results and effects:

Project results will increase knowledge about additively manufactured materials and how its characteristic material structure affects the dimensioning of compressor cases for aircraft engines. The expectation is that results can contribute to a reduced environmental impact, partly during manufacturing and then during the engine´s life cycle through lower weight.

Approach and implementation:

Test specimens will be manufactured to be able to compare sheet material and additively manufactured material, for both Ti-64 and Ti-6242. The data from material testing will be evaluated and material models with associated failure criterion will be calibrated. The material model will then be verified against ballistic testing, test that should be able to be simulated by FE analysis.

Test material is provided by GKN and testing is performed by LTU. Modeling and simulation will then be in collaboration between industry and academia.