Six thread rolling die specimens were compared based on surface characteristics and material properties. This research is important in providing insights into why some tools may perform better than others. Surface characteristics were quantified by measuring five locations on new and used die regions. Measurements were compared using F-tests of height parameters, relative area, and complexity. Material characteristics were compared by examining the alloy, microstructure, microhardness profiles, and failure mode. The larger dies appeared to have failed from spalling, while the smaller dies by abrasive wear. Hardness vs. depth profiles were different for each die. At scales between 1 and 10 µm2, relative area appears to correlate well to lifetime.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Booth, Jessica A.
• Massey, Mackenzie N.

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-042612-135331

Advisor

• Brown, Christopher A.

Year

• 2012

Date created

• 2012-04-26

Resource type

• Major Qualifying Project

Major

• Mechanical Engineering

Rights statement

• In Copyright