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Study of Fatigue and Fracture Behavior of Cr-Based Alloys and IntermetallicMaterials: Effects of Processing on the Microstructure and Mechanical Behavior of Binary Cr-Ta Alloys

机译:Cr基合金与金属间材料的疲劳与断裂行为研究:加工对二元Cr-Ta合金组织和力学行为的影响

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The microhardness and tensile and fracture-toughness properties of drop-cast anddirectionally-solidified Cr-9.25 atomic percent Ta alloys have been investigated. Directional solidification was found to soften the alloy which could be related to the development of equilibrium and aligned microstructures. It was observed that the tensile properties of the Cr-Ta alloys at room and elevated temperatures could be improved by obtaining aligned microstructures. The directionally-solidified alloy also showed increased fracture toughness at room temperature. This trend is mainly associated with crack deflection and the formation of shear ribs in the samples with aligned microstructures. The sample with better-aligned lamellar exhibits greater fracture toughness.

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