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Study On Hold Time Effects On Standard Fatigue Specimens And Component Relevant Loading Conditions At Welds Using Bending Specimens From Welded Pipes

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This paper summarizes the results of a research project on environmental effects on the environmentally assisted fatigue lifetime of laboratory specimens made of austenitic stainless steel type 316L and corresponding welds. In particular, investigations on the effect of hold-times, applied during testing in high-temperature water and tests on the fatigue welds were performed.

Product Number: ED22-18531-SG
Author: Michael Grimm, Matthias Herbst, Armin Roth, Jürgen Rudolph
Publication Date: 2022
$20.00
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$20.00


Strain controlled fatigue tests were performed at low strain rates and at low strain amplitudes using the austenitic stainless Cr-Ni-steel type 316L. The fatigue cycling was performed at 240 °C, whereas holds were applied at higher temperature (290 °C). The effect of hold periods was compared to reference tests without holds and to the prediction based on NUREG/CR-6909.
Additionally, cycling tests using 3-point bending specimens with welds, extracted from a welded 316L pipe, were performed in air and in high-temperature water. Such specimens were tested either in as welded condition or with a defined post-weld surface machining.


Strain controlled fatigue tests were performed at low strain rates and at low strain amplitudes using the austenitic stainless Cr-Ni-steel type 316L. The fatigue cycling was performed at 240 °C, whereas holds were applied at higher temperature (290 °C). The effect of hold periods was compared to reference tests without holds and to the prediction based on NUREG/CR-6909.
Additionally, cycling tests using 3-point bending specimens with welds, extracted from a welded 316L pipe, were performed in air and in high-temperature water. Such specimens were tested either in as welded condition or with a defined post-weld surface machining.

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