Technical report WVT-TR-
75017. Watervliet Arsenal. Watervliet, New York, 1975, - 14 p.Two tubes were examined metallographically as part of the fatigue testing program being conducted at the Watervliet Arsenal for the Naval Weapons Lab NWL), Dahlgren, VA. One tube, No. 52, was fired 1590 rounds with NACO, while the other tube, No. 7, was fired 1500 rounds with PYRO as the propellant. NACO, which is a propellant designed to reduce the wear rate, has a flame temperature of 2150 K as compared to 2650 K for the PYRO. Summarized herein are the results of a metallographic examination i:ito the surface and near surface relative damage introduced by the two types of propellant.Contents:
Introduction.
Procedures.
Results and Discussion.
Macroscopic Comparison of the Tubes.
Microscopic Comparison of the Tubes.
Hardness of the Layers.
Conclusions.
