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RESEARCH PAPERS: Gas Turbines: Industrial

Criteria for Design With Structural Materials in Combined-Cycle Applications Above 815°F

[+] Author and Article Information
R. W. Swindeman

Oak Ridge National Laboratory, Oak Ridge, TN 37831

D. L. Marriott

Stress Engineering Services, Cincinnati, OH 45246

J. Eng. Gas Turbines Power 116(2), 352-359 (Apr 01, 1994) (8 pages) doi:10.1115/1.2906827 History: Received March 03, 1993; Online April 24, 2008

Abstract

A number of materials issues related to the design of piping and support components in high-temperature fluidized bed combustor systems were examined. These issues included the availability of long-time design data on structural materials, the general character of the creep and stress rupture behavior, the performance of weldments, and the assessment of damage accumulation. Emphasis was placed on alloy 800H, but several other alloys were briefly examined for use at temperatures above 816°C (1500°F). It was concluded that the character of the creep curve ranged significantly with chemistry, processing variables, and environment, and that the specification of design allowable stresses and life estimation techniques must be approached with caution for service above 816°C (1500°F).

Copyright © 1994 by The American Society of Mechanical Engineers
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