International Journal of Cast Metals Research · 2000 · 45 citations · 2 references
EngineeringMaterials EngineeringMaterials ScienceMaterials CharacterizationMechanical Behavior Of MaterialsMetallurgyAlloysFracture MechanicsFracture ToughnessImpact BehaviorImpact MechanicsStrength Of MaterialsChemical ModificationCrack InitiationCrack PropagationHeat Treatment EffectsImpact StrengthImpact TestingInstrumented Impact TestingSolution Heat Treatment
The impact properties of 413, 356, 319 and 332 alloys were assessed using instrumented impact testing equipment. The fracture responses of the impact specimens were studied in terms of total absorbed energy, crack initiation and crack propagation energies. The influence of the microstructure on the impact strength was investigated. The effects of chemical modification and/or heat treatment of 356 alloy were examined by testing unmodified and Sr modified samples in the as-cast condition and T6 condition with different solution heat treatment times and artificial aging times.In the case of the 413 and 356 alloys, the impact strength was found to be influenced by the amount, size and morphology of the eutectic silicon. On the other hand, the intermetallic phases such as CuAl2 in 319 and 332 alloys exert a greater influence than does the eutectic silicon. Solution heat treatment of 356 alloy was found to have a profound effect on the impact properties.
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