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Methodology for Stress-Controlled Fatigue Test under In-air and PWR Coolant Water Condition and to Evaluate the Effect of PWR Water and Loading Rate on Ratcheting

[+] Author and Article Information
Bipul Barua

Argonne National Laboratory, Lemont, IL, USA
barua@anl.gov

Subhasish Mohanty

Argonne National Laboratory, Lemont, IL, USA
smohanty@anl.gov

Joseph Listwan

Argonne National Laboratory, Lemont, IL, USA
jlistwan@anl.gov

Saurin Majumdar

Argonne National Laboratory, Lemont, IL, USA
majumdar@anl.gov

Krishnamurti Natesan

Argonne National Laboratory, Lemont, IL, USA
natesan@anl.gov

1Corresponding author.

ASME doi:10.1115/1.4039345 History: Received November 20, 2017; Revised January 30, 2018

Abstract

This work investigates the behavior of 316 stainless steel (SS) under stress-controlled low cycle fatigue loading. Several fatigue experiments are conducted under different environment such as in-air at 300 °C and primary loop water conditions for a pressurized water reactor (PWR). Two different loading conditions are also employed to examine the effect of stress rate on material hardening and ratcheting. During PWR water test, actuator position measurements are used to determine the strain of the specimen. Under PWR environment, 316 SS is found to ratchet significantly higher. At slow stress rate, higher amount of cyclic hardening is observed in 316 SS. However, slow stress rate increases the rate of ratcheting.

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