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149351 https://hdl.handle.net/2286/R.I.8645 http://rightsstatements.org/vocab/InC/1.0/ All Rights Reserved 2010 vi, 57 p. : ill. (some col.) Masters Thesis Academic theses Text eng Sayler, William A Biekert, Russ Danielson, Scott Georgeou, Trian Arizona State University Partial requirement for: M.S.Tech, Arizona State University, 2010 Includes bibliographical references (p. 40-42) Field of study: Technology (Manufacturing engineering technology) Micromachining has seen application growth in a variety of industries requiring a miniaturization of the machining process. Machining at the micro level generates different cutter/workpiece interactions, generating more localized temperature spikes in the part/sample, as suggested by multiple studies. Temper-etch inspection is a non-destructive test used to identify `grind burns' or localized over-heating in steel components. This research investigated the application of temper-etch inspection to micromachined steel. The tests were performed on AISI 4340 steel samples. Finding, indications of localized over-heating was the primary focus of the experiment. In addition, change in condition between the original and post-machining hardness in the machined slot bottom was investigated. The results revealed that, under the conditions of the experiment, no indications of localized over-heating were present. However, there was a change in hardness at the bottom of the machined slot compared to the rest of the sample. Further research is needed to test the applicability of temper-etch inspection to micromilled steel and to identify the source of the change in hardness. Industrial Engineering Engineering Mechanical Engineering Localized over-heating Micromachining Non-destructive test Steel Temper-Etch Steel--Nondestructive testing. Steel The application of temper-etch inspection to micromilled AISI 4340 steel specimen