ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 7 April 2011
Page Count: 10

ASTM Round-Robin on Creep-Fatigue and Creep Behavior of P91 Steel

Kalyanasundaram, V.
Dept. of Mechanical Engineering, Univ. of Arkansas, Fayetteville, AR

Saxena, A.
Dept. of Mechanical Engineering, Univ. of Arkansas, Fayetteville, AR

Narasimhachary, S.
Dept. of Mechanical Engineering, Univ. of Arkansas, Fayetteville, AR

Dogan, B.
EPRI, Charlotte, NC

(Received 22 December 2010; accepted 3 March 2011)

Abstract

The American Society for Testing and Materials (ASTM), through its Committee E08 on Fatigue and Fracture subcommittee E08.05 on Creep-Fatigue Crack Formation, has recently developed a new standard for creep-fatigue testing (ASTM E2714-09). This paper describes the plans and preliminary results from a round-robin being presently conducted in support and verification of this new standard. The choice of the test material (ASTM Grade P91), the design of the round-robin test matrix, and a machining plan for the specimens are described. The results of microstructural analysis, tensile testing, and creep deformation and rupture testing are also presented along with some preliminary results from creep-fatigue testing. A new analytical model for representing the creep deformation characteristics of this material is also presented and evaluated using the creep data generated as part of the round-robin program. The results of the round-robin creep-fatigue testing will be used to make appropriate modifications to the test standard.

Keywords:
creep-fatigue, crack formation, statistical data analysis, creep deformation and rupture

Paper ID: JAI103712
DOI: 10.1520/JAI103712
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