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Technical Brief

Development of Fatigue Crack Growth Thresholds for Austenitic Stainless Steels Exposed to Air Environment for ASME Code Section XI

[+] Author and Article Information
Kunio Hasegawa

Center of Advanced Innovation Technologies,
Technical University of Ostrava,
17. Listopadu 15/2172,
Ostrava-Poruba 708 33, Czech
e-mail: kunioh@kzh.biglobe.ne.jp

Saburo Usami

Hitachi, Ltd.,
Hitachi-shi, Ibaraki-ken 319-1292, Japan
e-mail: Saburo.usami.ak@hitachi.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received September 11, 2017; final manuscript received January 25, 2018; published online April 4, 2018. Assoc. Editor: Kiminobu Hojo.

J. Pressure Vessel Technol 140(3), 034501 (Apr 04, 2018) (5 pages) Paper No: PVT-17-1180; doi: 10.1115/1.4039207 History: Received September 11, 2017; Revised January 25, 2018

Fatigue crack growth thresholds ΔKth define stress intensity factor range below which cracks will not grow. The thresholds ΔKth are useful in industries to determine durability lifetime. Although massive fatigue crack growth experiments for stainless steels in air environment had been reported, the thresholds ΔKth are not codified at the American Society of Mechanical Engineers (ASME) Code Section XI, as well as other fitness-for-service (FFS) codes and standards. Based on the investigation of a few FFS codes and review of literature survey of experimental data, the thresholds ΔKth exposed to air environment have been developed for the ASME Code Section XI. A guidance of the thresholds ΔKth for austenitic stainless steels in air at room and high temperatures can be developed as a function of stress ratio R.

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References

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Usami, S. , and Shida, S. , 1982, “Effect of Environment, Stress Ratio, and Defect Size on Fatigue Threshold,” J. Soc. Mater. Sci. Jpn., 31(344), pp. 493–499 (in Japanese). [CrossRef]
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NRIM, 1986, “Fatigue Data Sheet, Data Sheets on Fatigue Crack Propagation Properties for Butt Welded Joints SUS304-HP(18Cr–8Ni) Hot Rolled Stainless Steel Plates: Effect of Stress Ratio,” Vol. 54, National Research Institute of Metals, Tokyo, Japan.
West, E. , Mohr, H. , and Lord, E. , 2016, “Fatigue Threshold Behavior of Stainless Steel in High Temperature Air and Water,” ASME Paper No. PVP2016-63051.

Figures

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Fig. 1

Reference fatigue crack growth rates for carbon and low alloy ferritic steels exposed to air environment provided by the ASME B&PV Code Section XI

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Fig. 2

Reference fatigue crack growth rates for carbon and low alloy ferritic steels exposed to water environment provided by the ASME B&PV Code Section XI

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Fig. 3

Reference fatigue crack growth rates for austenitic stainless steels exposed to air environment provided by the ASME B&PV Code Section XI

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Fig. 4

Reference fatigue crack growth rates for austenitic stainless steels exposed to PWR water environment provided by the ASME B&PV Section XI Code Case

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Fig. 5

ΔKth for austenitic stainless steels codified by FFS codes and test data

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Fig. 6

Literature surveyed ΔKth for austenitic stainless steels in air environment at room temperature

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Fig. 7

ΔKth for austenitic stainless steel in air environment at high temperature

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Fig. 8

Proposed fatigue crack growth rates for austenitic stainless steel exposed to air environment

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