grain-structure-influencing-metal-propertiesConventionallycastDirectionallysolidifiedTechnicalsingle crystalMaterial properties at high temperatures areespecially heavily influenced by the sizeand orientation of grains.Dynamic strengthThermal fatigueCreep resistance/creep strain+++++++-00Grain boundary orientationLongitudinal "L" Transversal "T" Diagonal "D" 800 900 1000Temperature [°C]Life span [h]10005000DTLThe tests were conducted with equal loadsat specific temperature levelsMaterial: Ni-basedcast alloyDependency of creep resistance on thegrain orientation (schematic)ABCDA = Columnal crystals, large, transversalB = Globular crystals, largeC = Columnal crystals, small, longitudinalD = Small crystalsTypical grain distribution in a cast turbine stator vane