Observations of fatigue crack behaviour in proton-irradiated 304 stainless steel

Spencer, Rory P and Patterson, Eann A ORCID: 0000-0003-4397-2160 (2019) Observations of fatigue crack behaviour in proton-irradiated 304 stainless steel. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 42 (9). pp. 2120-2132.

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Official URL: http://dx.doi.org/10.1111/ffe.13087

Abstract

<jats:title>Abstract</jats:title><jats:p>Thermoelastic stress analysis (TSA) has been used to monitor fatigue crack growth in compact tension (CT) specimens, made from 304 grade austenitic stainless steel, that have been subject to proton irradiation. Several specimens had a 10 × 10 mm area ahead of a 1‐mm precrack irradiated with a 1.6 MeV proton beam up to 0.216C to 0.648C of accumulated charge prior to fatigue testing. Subsequently, specimens were loaded sinusoidally at 20 Hz with an <jats:italic>R</jats:italic> ratio of 0.5, and TSA data were collected both at the loading frequency and its second harmonic. Irradiation appears to cause an increase in the fatigue life, with a reduction in crack growth rate observed in the irradiated specimens compared with the unirradiated control specimens. Irradiation damage caused a moderately linear change in both the parameters of the Paris law with accumulated charge from the irradiation.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	304 stainless steel, fatigue crack growth rates, proton irradiation, thermoelastic stress analysis, TSA
Depositing User:	Symplectic Admin
Date Deposited:	10 Jun 2019 08:48
Last Modified:	21 Aug 2023 18:10
DOI:	10.1111/ffe.13087
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3045218