Fracture Behavior and Delamination Toughening of Molybdenum in Charpy Impact Tests

摘要: This study combines advanced characterization techniques with conventional Charpy impact tests to relate the mechanical properties microstructure of technically pure molybdenum, especially regarding its toughness. V-notched samples different orientations were prepared from a rolled molybdenum plate in stress-relieved and recrystallized condition. The ductile-to-brittle transition-temperature was analyzed terms delamination behavior influenced by microstructure. A pronounced increase toughness found for specific oriented samples, which can be explained macroscopic delamination. Elongated grains led enhanced variations orientations. In general, occurs as result brittle fracture; however, an test provoked. mechanism is called thin sheet toughening or toughening. Electron backscatter diffraction measurements performed get deeper knowledge about crack propagation plate. Recrystallization shifts transition region significantly higher temperatures, globular grain shape well boundary segregation. occurrence discussed, taking texture, segregation effects into account.