|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Hume-Rothery Award Symposium: Alloy Phase Chemistry at the Atomic Level - Opportunities and Challenges
||Grain Boundaries in Molybdenum. The Role of Segregation for an Improved Ductility
||Katharina Babinsky, Sophie Primig, Wolfram Knabl, Alexander Lorich, Helmut Clemens, Verena Maier-Kiener
|On-Site Speaker (Planned)
Combining mechanical properties with chemical information on the nanometer scale have become a key approach in recent characterization techniques of metals and their alloys. The availability of advanced high-resolution characterization techniques such as the three-dimensional atom probe facilitates a detailed investigation of materialīs interfaces on the atomic level. For Molybdenum and its alloys it is shown how to correlate atom probe tomography with mechanical testing on different length-scales. The direct correlation of strength and ductility with segregation mechanisms significantly helps to understand the intergranular fracture of molybdenum. Therefore, high-angle grain boundaries of recrystallized and as-deformed molybdenum are studied and described by the interfacial excess values of the segregation over the disorientation of the grain boundaries. Furthermore, the grain boundaries of molybdenum model alloys, which are showing a fracture mode change, are analyzed and compared to pure molybdenum. An outlook for improved ductility of molybdenum focusing on segregated elements is given.
||Planned: Supplemental Proceedings volume