2 3 A D V A N C E D M A T E R I A L S & P R O C E S S E S | N O V E M B E R / D E C E M B E R 2 0 2 2 automatic hardness testing system was used in conjunction with AutoCAD CSV files to create complex, artistic, and engineered designs. The sample experienced localized recrystallization and grain growth, and the indentations were polished to reveal the new grains in the desired pattern. Through testing and experimentation, the optimal spacing was determined to be 80 to 100 μm between indentations with a 1 kgf load. Klemm’s I, II, and III, were investigated as potential etchants for the project. It was concluded that Klemm’s II was the most suitable etchant for the desired results due to its vibrant colors under polarized light. Using these processes, several images were created. ~AM&P For more information: Gerald R. Bourne, professor, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, 303.273.3778, bourne@mines. edu. This article has been adapted from a full length feature article in the October 2022 issue of ASM International’s journal, Metallography, Microstructure, and Analysis. References 1. 2021 International Metallographic Contest, ASM International, https:// www.asminternational.org/web/ims/ membership/imc. 2. M. Niewczas, Chapter 75: Disloca- tions and Twinning in Face Centered Cubic Crystals, Dislocations in Solids, Elsevier, Vol. 13, p 263-364, 2007. 3. G. Vander Voort, Color Metallography, Microscopy Today, November 2005. 4. Metallography: An Introduction, Metallography and Microstructures, Vol. 9, ASM Handbook, ASM International, 2004. ISBN: 0-87170-706-3. 5. Sodium Thiosulfate, Institut für Arbeitsschutz der DGUV, https://gestis. dguv.de/data?name=002480&lang=en.
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