TY - THES

T1 - Evaluierung der Schädigung von additiv gefertigten Zellstrukturen mit Hilfe einer zerstörungsfreien Prüfmethode

AU - Vasold, Paola Maria

N1 - gesperrt bis 30-05-2028

PY - 2023

Y1 - 2023

N2 - Additive manufacturing processes are constantly offering new ways and possibilities to generate complex structures from different materials. Due to their lightweight construction properties, lattice structures made of AlSi10Mg are in great demand, especially in the aerospace industry but also in the automotive industry, and are the subject of intensive research. Components in these application areas have high demands in terms of quality and function. This makes extensive (non-destructive) testing, such as the CT scan, which is frequently used for AM products, unavoidable. However, these are often associated with high effort and costs. For this reason, this thesis deals in depth with the development of a simple, efficient and cost-effective non-destructive testing method. Frequency measurements have proven to be a successful method. In this thesis the theoretical background is described, a potential test setup is reviewed and measurements before and after different types of damage are performed. In addition, the mechanical properties of AM fabricated lattice structures are determined and furthermore the microstructure and porosity are characterized before and after heat treatment. A significant decrease in the first and second resonant frequencies was observed due to the induced volume damage, as well as a general change in the frequency signal due to plastic damage.

AB - Additive manufacturing processes are constantly offering new ways and possibilities to generate complex structures from different materials. Due to their lightweight construction properties, lattice structures made of AlSi10Mg are in great demand, especially in the aerospace industry but also in the automotive industry, and are the subject of intensive research. Components in these application areas have high demands in terms of quality and function. This makes extensive (non-destructive) testing, such as the CT scan, which is frequently used for AM products, unavoidable. However, these are often associated with high effort and costs. For this reason, this thesis deals in depth with the development of a simple, efficient and cost-effective non-destructive testing method. Frequency measurements have proven to be a successful method. In this thesis the theoretical background is described, a potential test setup is reviewed and measurements before and after different types of damage are performed. In addition, the mechanical properties of AM fabricated lattice structures are determined and furthermore the microstructure and porosity are characterized before and after heat treatment. A significant decrease in the first and second resonant frequencies was observed due to the induced volume damage, as well as a general change in the frequency signal due to plastic damage.

KW - Additive Fertigung

KW - SLM

KW - Zellstrukturen

KW - AlSi10Mg

KW - Frequenzmessung

KW - Zerstörungsfreie Prüfmethoden

KW - additive manufacturing

KW - SLM

KW - cell structures

KW - lattice structures

KW - AlSi10Mg

KW - frequency measurement

KW - non-destructive testing methods

M3 - Masterarbeit

ER -