Assessment of grain boundary cohesion of technically pure and boron micro-doped molybdenum via meso-scale three-point-bending experiments
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Autoren
Organisationseinheiten
Externe Organisationseinheiten
- Plansee SE, Reutte
- Erich-Schmid-Institut für Materialwissenschaft der Österreichischen Akademie der Wissenschaften
Abstract
Grain boundary engineering plays a major role for controlling the properties of modern high-performance materials. Especially Mo and its alloys have advantageous high-temperature structural properties as well as a number of attractive functional properties. However, depending on the processing state, technically pure Mo is prone to intercrystalline failure at low temperatures. The addition of B and/or C is known to improve interface cohesion, allowing for a targeted improvement of mechanical properties through segregation engineering. In this work, the early stages of crack initiation of technically pure and B micro-doped Mo are investigated by scanning electron microscopy on the tension-loaded surface after three-point-bending of mm-sized specimens. Increased grain boundary cohesion is evident from a drastically reduced relative length of separated interfaces in the B-doped material. The presence of B at the grain boundaries is confirmed via atom probe tomography experiments.
Details
Originalsprache | Englisch |
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Aufsatznummer | 109848 |
Seitenumfang | 8 |
Fachzeitschrift | Materials and Design |
Jahrgang | 207.2021 |
Ausgabenummer | September |
DOIs | |
Status | Veröffentlicht - 24 Mai 2021 |