TRI-SERVICE GREEN GUN BARREL An Environmentally Friendly Deposition Process to Replace Aqueous Electrodeposition of Chrome HARD CHROME ALTERNATIVES TEAM PROGRAM REVIEW MEETING KENNEDY SPACE CENTER 13-14 DECEMBER 2000 U.S. Army Research, Development and Engineering Center Benet Laboratory Watervliet, NY 12189-4050 John D. Vasilakis, DSN 974-5692
TRI-SERVICE GREEN GUN BARREL An Environmentally Friendly Deposition Process to Replace Aqueous Electrodeposition of Chrome HARD CHROME ALTERNATIVES TEAM PROGRAM REVIEW MEETING KENNEDY SPACE CENTER 13-14 DECEMBER 2000 U.S. Army Research, Development and Engineering Center - PowerPoint PPT Presentation
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TRI-SERVICE GREEN GUN BARREL An Environmentally Friendly Deposition Process to Replace Aqueous
Electrodeposition of Chrome
HARD CHROME ALTERNATIVES TEAMPROGRAM REVIEW MEETING
KENNEDY SPACE CENTER13-14 DECEMBER 2000
U.S. Army Research, Development and Engineering Center Benet Laboratory
Watervliet, NY 12189-4050John D. Vasilakis, DSN 974-5692
INTERACTIONS
ACADEMIA
• New Jersey Institute of Technology
• Rensselaer Polytechnic Institute
• SUNY - Albany
• SUNY - Stonybrook
• Stevens Institute of Technology
• INDUSTRY OTHERS
• GDAS/SACO ARDEC CCL
• UDLP ARL
• Boeing GGB Partners
Problem / Objective
• ProblemEnvironmentally unfriendly materials and processCarcinogenic chemicals (Cr VI)8% of barrel cost due to environmental compliance (target of opportunity)
Watervliet Arsenal (120-155mm)Rock Island Arsenal (25mm)General Dynamics (25mm,30mm)
ObjectiveReplace the current material and process with an environmentally friendly process for gun barrel bore protection
What is CMS ?CYLINDRICAL MAGNETRON SPUTTERING
(sputtering circa 1780) (magnetron sputtering circa 1935)
Effect of Post-Heating of Coatingon Rifled Barrel Section
Groove test following the heating of the coated section. Some alpha-Ta is beginningto precipitate. Adhesion is excellent.
Groove test of specimen CMS-00317 afterapprox 1.5 mil of plating. Mainly beta-Tatexture. Knoop hardness 800-900. Much ‘decohesion’ and interfacial failure
Only for non-autofrettaged guns
GROOVE TEST ON MUZZLE END OF M242 SECTION
Photomicrograph of the
muzzle section of a fired
Bushmaster tube section.
Groove tests for adhesion
were conducted after the
firing.
SPUTTERED COATING ON GROOVE
Coating changes from alpha to betaTantalum alongthe side of thegroove.
UNAFFECTED COATING ON LAND
Alpha Tantalum
SPUTTERING TOWER
Sputtering tower isholding a 44” long45mm diameter tubesection in preparationfor plating a 45mm Casius gun tube forthe InternationalFTMA program
The same tower is willbe used to plate the 25mm Bushmaster and the GAU-12.