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.

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Bethesda, MD  United States  20084
• Authors:
  • Zanis, C A
• Publication Date: 1975-1

Media Info

• Pagination: 27 p.

Subject/Index Terms

• TRT Terms: Alloys; Aluminum alloys; Copper alloys; Iron alloys; Manganese; Mechanical fatigue; 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;

Filing Info

• 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