ELEVATED-TEMPERATURE MECHANICAL BEHAVIOR OF A CARBON-MANGANESE PRESSURE VESSEL STEEL

The short-time effects of stress and temperature on the mechanical properties of a carbon-manganese pressure vessel steel were investigated using room- and elevated-temperature tensile tests and short-time creep-rupture tests. The tensile test results indicated that strain aging effects were not observed in the temperature range 1100 F to 1250 F. Analysis of the creep-rupture data, in the range 1150 F to 1250 F, by the Larson-Miller method using the procedures of Manson and Mendelson provided a value of 20.7 for the material constant, C. In the temperature and stress regime studied, a linear relationship was observed between log(stress) and log(time-to-rupture). Fractographic analyses revealed a common fracture mode in all specimens tested. The fracture mode is described as an intermediate type, containing features of both transgranular and intergranular fracture.

• Supplemental Notes:
  • Sponsored in part by Federal Railroad Administration, Washington, D.C. Pub. in Jnl. Eng. Mater. Technol. 99, n4 p359-365 Oct 77.
• Corporate Authors:

  National Bureau of Standards

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  Federal Railroad Administration

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• Authors:
  • Early, J G
• Publication Date: 1977

Media Info

• Pagination: 7 p.

Subject/Index Terms

• TRT Terms: Alloy steel; Alloys; Carbon steel; Creep; Creep tests; Fatigue strength; Fracture mechanics; Fracture properties; High temperature; Manganese; Metallurgy; Pressure vessels; Railroad materials; Steel; Strength of materials; Tank cars; Tensile properties; Tension tests; Tests
• Old TRIS Terms: Creep rupture strength; Creep rupture tests; Manganese containing alloys; Tank car construction materials
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00169198
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt.
• Files: NTIS, TRIS, USDOT
• Created Date: Jan 30 1978 12:00AM