Preliminary Development of Ultrasonic C-Scan Test Methods and Standards to Determine Projectile-Rotating Band Integrity
Abstract
In the attachment of a copper rotating band to a projectile body, craters, unbonds, and crack systems may develop. Theses defects may produce serious structural failures or aerodynamic instability. The ultrasonic C-scan evaluation of roating bands on 8-inch diameter projectiles was conducted using both longitudinal and shear angle techniques to assess the integrity of the weld overlay band and the shell body. The longitudinal wave method was used to inspect for unbond areas at the interface of the shell body and rotating band. From this work it was ascertained that ultrasonic C-scanning yields an accurate representation of unbond areas developed during the weld overlay method of attaching rotating bands. Cracks and craters at the outer diameter of the steel body were investigated by means of the shear angle beam method. It was found that at an optimum shear angle of 45 deg, longitudinal saw cuts of various depths and also actual weld craters in the steel shell are readily detected and recorded with C-scan techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1976
- Accession Number
- ADA020970
Entities
People
- Daniel J. Roderick
- Robert A. Muldoon
- Robert H. Brockelman
Organizations
- United States Army Research Laboratory