Questions and Answers
What is the purpose of an impact test?
To assess the material's resistance to impact loading
What does the impact energy value indicate about a material?
Its toughness under test conditions
What are the three conditions chosen for impact test to represent potential for fracture?
Low temperature, high strain rate, and triaxial stress state
Which standardized tests are used to measure impact toughness?
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What shape is the specimen for both Charpy and Izod tests?
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At what angle is the V-notch machined into the specimen for Charpy and Izod tests?
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What is the primary difference between the Charpy and Izod techniques?
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What is the measure of impact energy in the Charpy V-notch (CVN) technique?
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What is the significance of ductile-to-brittle transition temperature (DBTT)?
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What happens to the impact energy as the temperature is lowered?
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How does the nature of fracture mode change as the temperature is lowered?
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What is used to determine the transition temperature for ductile and brittle fracture?
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What is the equation for impact strength ($σ_{impact}$) in the Charpy V-notch (CVN) technique?
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