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2012 - 11th Annual NC State Summer Undergraduate Research Symposium
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Session Time :
8/1/12 3:00 PM - 8/1/12 4:14 PM
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Content Area : Advanced Materials for Environmental Sustainability
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Lead Student Presenters : Andrew Jonathan Stutts
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Abstract Title : On the hardness and crystal structure of FeNiCrCoMn
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Abstract :
This project investigates the effects of annealing and varying composition on the hardness and crystal structure of the FeNiCrCoMn High Entropy Alloy. Several different samples were prepared, with the amounts of Nickel and Chromium being varied between 14 and 26 atomic percent in each. The samples were produced by mechanical alloying using high-energy ball milling resulting in an average grain size of less than 10 nm. Each of the samples was then annealed at 400, 600, 800, and 1000°C for one hour in a 98% argon/2% hydrogen atmosphere. Hardness values for the samples were calculated using the Vickers hardness test. Most of the samples exhibited an fcc structure, but some had significant intermetallic phases that were observed only after annealing. The crystal structure was analyzed using x-ray diffraction.
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Mentor and/or Co-Author : Carl C. Koch
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