Application of fracture mechanics to the surface crack propagation in stainless steel at elevated temperatures

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(96)00342-4· OSTI ID:514666

Chen, J ^[1]; Takezono, Shigeo; Tao, Katsumi; Hazawa, Tomonori ^[2]

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1. Tottori Univ. (Japan). Dept. of Mechanical Engineering
2. Toyohashi Univ. of Technology (Japan). Dept. of Mechanical Engineering

The propagation of small surface cracks in SUS 304 stainless steel is examined at elevated temperatures. In the temperature region studied, the crack growth is mainly cycle-dependent. When temperature is higher than 500 C, creep-dependent crack growth becomes dominant which results in a larger crack growth rate. By confirming that the surface crack maintains a semi-elliptic shape during its growth and by investigating the cyclic deformation behavior of the material, elastic-plastic fracture mechanics parameters are evaluated and used to correlate the crack growth rate. Both the J integral range {Delta}J, and the effective J integral range {Delta}J{sub eff}, which accounts for the crack closure effect, are found to be excellent to consolidate crack growth rates for the high temperature fatigue conditions.

• OSTI ID: 514666
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 6 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOILERS
CRACK PROPAGATION
FRACTURE MECHANICS
STAINLESS STEEL-304
TEMPERATURE RANGE 0400-1000 K
THERMAL FATIGUE
TURBINES