Q4. (20 pnts) A) Write the Hall-Petch equation for strengthening through grain size reduction. Define all...
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Q4. (20 pnts) A) Write the Hall-Petch equation for strengthening through grain size reduction. Define all involved parameters. B) Extract material constants from the plot below, which shows the influence of grain size, d, on the yield strength of Ni thin films. Show all work on the page dedicated to Q4. Compute the yield strength, if a grain size of 23 um is used. 40 35 30 25 O 06 0 12 0.16 0 10 12 d (um2) 0.08 0.14 Figure taken from Keller and Hug, "Hall-Petch behaviour of Ni polycrystals with a few grains per thickness", Materials Letters 62 (2008) 1718-1720. Dots represent experimental data. You need to use the straight trendline for your answer. Yield stress (MPa) Q4. (20 pnts) A) Write the Hall-Petch equation for strengthening through grain size reduction. Define all involved parameters. B) Extract material constants from the plot below, which shows the influence of grain size, d, on the yield strength of Ni thin films. Show all work on the page dedicated to Q4. Compute the yield strength, if a grain size of 23 um is used. 40 35 30 25 O 06 0 12 0.16 0 10 12 d (um2) 0.08 0.14 Figure taken from Keller and Hug, "Hall-Petch behaviour of Ni polycrystals with a few grains per thickness", Materials Letters 62 (2008) 1718-1720. Dots represent experimental data. You need to use the straight trendline for your answer. Yield stress (MPa)
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Advanced Financial Accounting
ISBN: 978-0137030385
6th edition
Authors: Thomas Beechy, Umashanker Trivedi, Kenneth MacAulay
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