A Method for Performing Dynamic Tensile Extrusion of Materials at High Temperature
Abstract
Dynamic tensile extrusion is a well-established material characterization technique that involves firing a test projectile through a conical die. Our method adds the capability of performing extrusions after heating the projectile (and test barrel) with a 7 kW induction furnace. This new apparatus successfully extruded a 6.35-mm (0.25-inch) copper projectile to a diameter of 1.9 mm at a temperature of approximately 725 C. The extruded copper fragments were recovered, mostly undamaged, using a ballistic gel block. We performed three tests at a projectile velocity of approximately 450 m/s, with one test done at room temperature as a control. Up to twice the amount of a given projectile will extrude through the die at high temperature when compared with the amount extruded from a room-temperature test.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 28, 2019
- Accession Number
- AD1074920
Entities
People
- Jeffrey Ball
- Joseph Koby
Organizations
- United States Army Combat Capabilities Development Command