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- Title
Fatigue properties of conventionally manufactured and micro-powder-injection-moulded 17-4PH micro-components.
- Authors
Slaby, S. A.; Kraft, O.; Eberl, C.
- Abstract
Micro-powder injection moulding ( μPIM) is a promising mass manufacturing technique for the microsystem technology. Because typical applications - like sensors or actuators - need to withstand serious mechanical loadings, the investigations of the mechanical properties are of vital importance. Therefore, we implemented a small-scale testing setup that enables tensile and tension-tension-fatigue testing of freestanding micro-samples. This allowed for investigating tensile and fatigue properties of conventionally produced and μPIM 17-4PH stainless-steel thin membranes. The conventionally produced samples were machined from bulk material and showed properties and lifetimes comparable with the best bulk samples. The μPIM samples showed a weaker but more ductile behaviour, due to a ferritic phase and SiO2 inclusions. But their ultimate tensile strength of up to SU = 1021 ± 48 MPa and their relative fatigue strength of ≈46% SU ( R = −1) are still comparable with average bulk values. This indicates the high potential of μPIM materials.
- Subjects
MATERIAL fatigue; POWDER injection molding; MECHANICAL loads; TENSILE strength; STAINLESS steel; ARTIFICIAL membranes
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2016, Vol 39, Issue 6, p780
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.12416