Advanced Metalworking Solutions for Naval Systems that Go in Harm's Way
NAVY METALWORKING CENTER JOHNSTOWN PA
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Alloy 625, a nickel-based alloy, is difficult to form, particularly at room temperature. A Navy Metalworking Center NMC project minimized potentially significant schedule delays for the construction of the CVN 78 aircraft carrier by identifying optimal forming practices for Alloy 625 in several critical components as well as by evaluating the corrosion performance of the Alloy 625-to-HSLA high strength, low alloy steel welds. Using the project findings, Northrop Grumman Shipbuilding-Newport News NGSB-NN was able to form several complex shapes on the first attempt and in sufficient time to support the production schedule for these critical components. The project results minimized the risk of cracking this very expensive material, which would not only delay the production schedule but would also add cost to re-manufacture these shapes. This project supports the efforts to attain the desired benefits of Alloy 625 and to achieve an extended life cycle for Navy ship seawater cooling system designs. NMC worked with an Integrated Project Team IPT consisting of NGSB-NN, Naval Surface Warfare Center Carderock Division NSWCCD, and the Future Aircraft Carriers Program Office to progress this technology.
- Marine Engineering