STRESS-RELIEF HEAT TREATMENT OF MANGANESE-NICKEL-ALUMINUM BRONZE AND MANGANESE-BRONZE WELDMENTS
Tensile properties, weldability, general corrosion, and corrosion-fatigue properties were determined as a function of stress-relief heat treatment for both cast Mn-Ni-Al bronze and manganese-bronze propeller alloys. It was found that Mn-Ni-Al bronze is susceptible to stress-corrosion cracking in the as-welded heat-affected zone. Stress-relief heat treatments in the range of 700 to 1200F were effective in eliminating the stress-corrosion cracking in this alloy. Manganese-bronze weldments exhibited poor weldability but were not found susceptible to stress-corrosion cracking. High-cycle corrosion-fatigue tests on weldments revealed an endurance strength at 10 to the 8th power cycles of 12,000 pounds per square inch for Mn-Ni-Al bronze and 7,500 to 11,000 pounds per square inch for manganese bronze.
David Taylor Naval Ship R&D CenterBethesda, MD USA 20084
- Zanis, C A
- Publication Date: 1975-1
- Pagination: 27 p.
- TRT Terms: Alloys; Aluminum alloys; Copper alloys; Fatigue (Mechanics); Iron alloys; Manganese; Metal heating; Nickel alloys; Propellers; Shipbuilding materials; Ships; Stress corrosion; Stress cracking; Stress relieving; Stresses; Tensile properties; Welding; Welds
- Uncontrolled Terms: Heat treatment; Weldability
- Old TRIS Terms: Corrosion cracking; Manganese alloys; Propeller materials
- Subject Areas: Marine Transportation; Materials; Vehicles and Equipment;
- Accession Number: 00090821
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: NSRD-4447 R&D Rpt.
- Files: TRIS
- Created Date: Jun 26 1975 12:00AM