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RESEARCH PAPERS

Elevated-Temperature Mechanical Behavior of a Carbon-Manganese Pressure Vessel Steel

[+] Author and Article Information
J. G. Early

Institute for Materials Research, National Bureau of Standards, Washington, D.C.

J. Eng. Mater. Technol 99(4), 359-365 (Oct 01, 1977) (7 pages) doi:10.1115/1.3443552 History: Received January 31, 1977; Revised April 19, 1977; Online August 17, 2010

Abstract

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 Significant in the temperature range 593 to 677 C (1100 to 1250 F). Analysis of the creep-rupture data, in the range 621 to 677 (1150 to 1250 F), by the Larson-Miller method using the procedure of Manson and Mendelson yielded 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.

Copyright © 1977 by ASME
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