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Article: Tensile Properties of Ni-Based Superalloy 720Li: Temperature and Strain Rate Effects
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- October 1, 2008
- Author:
CopyrightCopyright Minerals, Metals & Materials Society Oct 2008. Provided by ProQuest LLC. (Hide copyright information)
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Tensile properties, deformation, and fracture behavior of a wrought nickel-base superalloy 720Li have been studied in standard solutionized and two-stage-aged condition in the temperature range of 25 °C to 750 °C. Effect of strain rate on tensile behavior was assessed at 25 °C, 400 °C, and 750 °C at five strain rates that range between 10^sup -5^ s^sup -1^ and 10^sup -1^ s^sup -1^. The yield strength and ultimate tensile strength of the alloy remained unaffected by temperature until about 600 °C and 500 °C, respectively, typical of superalloys strengthened by fine and coherent intermetallic Ni^sub 3^Al-based precipitates. The flow stress of the alloy was found to be insensitive to ...