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research-article

Study of crack initiation of 15-15Ti austenitic steel in liquid PbBi

[+] Author and Article Information
Anna Hojna

Centrum Výzkumu Rez s.r.o., UJV Group, Rez 130, 25068 Husinec, Czech Republic
anna.hojna@cvrez.cz

Fosca Di Gabriele

Centrum Výzkumu Rez s.r.o., UJV Group, Rez 130, 25068 Husinec, Czech Republic
Fosca.Di_Gabriele@cvrez.cz

Michal Chocholousek

Centrum Výzkumu Rez s.r.o., UJV Group, Rez 130, 25068 Husinec, Czech Republic
Michal.Chocholousek@cvrez.cz

Zbynek Spirit

Centrum Výzkumu Rez s.r.o., UJV Group, Rez 130, 25068 Husinec, Czech Republic
zbynek.spirit@cvrez.cz

Lucia Rozumova

Centrum Výzkumu Rez s.r.o., UJV Group, Rez 130, 25068 Husinec, Czech Republic
lucia.rozumova@cvrez.cz

1Corresponding author.

ASME doi:10.1115/1.4041564 History: Received May 21, 2018; Revised September 21, 2018

Abstract

The austenitic steel 15-15Ti is being considered as one of the candidate materials for internal structural components of future Heavy Liquid Metal nuclear systems. This work studies the steel compatibility with liquid PbBi. Constant Extension Rate Tensile (CERT) tests of tapered specimens were used to study sensitivity to Liquid Metal Embrittlement (LME) and crack initiation. The taper creates a variation of stress along the gauge length which allows the identification of the stress and strain for the crack appearance. Testing was performed in air and in PbBi with 10-6 - 10-12 wt. % oxygen content at 300°C. Post-test observation by SEM highlighted the crack morphology. An evaluation of the environmental effect on the crack initiation is presented.

Copyright (c) 2018 by ASME
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