The application of temper-etch inspection to micromilled AISI 4340 steel specimen
Description
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.
Date Created
The date the item was original created (prior to any relationship with the ASU Digital Repositories.)
2010
Agent
- Author (aut): Sayler, William A
- Thesis advisor (ths): Biekert, Russ
- Committee member: Danielson, Scott
- Committee member: Georgeou, Trian
- Publisher (pbl): Arizona State University