Can You Identify the Microstructure?

Can You Identify the Microstructure? Metallogr. Microstruct. Anal. (2017) 6:625–626 https://doi.org/10.1007/s13632-017-0404-3 MYSTERY M ICRO Springer Science+Business Media, LLC and ASM International 2017 Send your clear, brief description by e-mail to the MMA Describe the microstructure accurately and win an editor at ryan.deacon@asminternational.org. Entries should invitation to submit your own ‘‘Mystery Micrograph.’’ be titled: ‘‘MMA Mystery Micro 6(6).’’ Weck’s reagent colors hydrides white in this lightweight Above micrograph submitted by Frauke Hogue, FASM, material. Identify the material class and/or alloy. Hogue Metallography, Pacific Palisades, Calif. Winner and answer will appear in an upcoming issue. Exceptional micrographs from winner submittals may be used on the journal cover. 123 626 Metallogr. Microstruct. Anal. (2017) 6:625–626 Answer for Volume 6, Issue 4 Mystery Micrograph This micrograph corresponds to an industrial hypoeutectic lamellar cast iron (carbon equivalent = 3.9%). It shows a primary austenite particle result of a coarsening process after an isothermal treatment at 1175 C, the solid–liquid region, for 4 days. The structure is preserved at RT by quenching the sample into water. This quenching promotes the martensitic needles inside the austenite particle and the surrounding fine dendritic austenite structures with a ledeburitic matrix (blue and red). The microstructure is etched by Motz’s reagent, picric-based etchant. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Metallography, Microstructure, and Analysis Springer Journals

Can You Identify the Microstructure?