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Study on Effects of Non-Isothermal Condition and Strain Holding on Environmentally Assisted Fatigue in PWR Primary Water Environment

[+] Author Affiliations
Seiji Asada

Mitsubishi Heavy Industries, Ltd, Kobe, Japan

Yuichi Fukuta

Mitsubishi Heavy Industries, Ltd, Takasago, Japan

Kawaljit Ahluwalia, David Steininger

Electric Power Research Institute, Palo Alto, CA

Paper No. PVP2016-63798, pp. V01AT01A028; 8 pages
doi:10.1115/PVP2016-63798
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 1A: Codes and Standards
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5035-0
  • Copyright © 2016 by ASME

abstract

To understand the fatigue behavior of austenitic stainless steels in a simulated PWR primary water environment, the patterns were studied. Austenitic stainless steel Type 316 plate was used as the test material.

Regarding non-isothermal testing: isothermal and non-isothermal fatigue tests were carried out for several patterns of temperature change and strain rate change. Typically, fatigue lives for non-isothermal tests with an out-of-phase strain change pattern were longer than those for isothermal tests.

Regarding strain holding testing: multiple groups of strain range cycles were separated by a long hold time and several test cases were carried out. Testing shows there is little difference in fatigue life for strain holding tests with high strain amplitude.

Copyright © 2016 by ASME

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