| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Microstructure-oriented Studies of Fatigue Damage in Additive Manufacturing Using Combined Enhanced Measurement Techniques |
| Author(s) |
Frank Walther |
| On-Site Speaker (Planned) |
Frank Walther |
| Abstract Scope |
The evolution of the microstructure in additive manufacturing (AM) processes is the detrimental effect on the fatigue strength in technical applications. Modern microscopy and intermittent testing with applied enhanced measurement techniques enable higher precision tracking of the influence of microstructure on fatigue damage stages. Intermittent fatigue testing of selective laser melted (SLM) Al alloys revealed the interaction between porosity and microstructure under loading in very-high cycle fatigue (VHCF) conditions. The grain boundary strengthening of the microstructure increased VHCF strength by 33%. Modification of AlSi10Mg composition with Sc leads to precipitation with enhanced elastic strength of SLM Al alloys by about 100 MPa. Nanodispersion of oxides into steels increased high-temperature strength significantly especially in steels modified interstitially by C and N. The previous examples of microstructure control as well as other examples are presented to reveal the potential to enhance the reliability of application of AM components based on microstructural improvements. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |