Work

Low constraint fracture toughness testing for master curve reference temperature determination using 10 mm-thick SE(B) and SE(T) specimens

Year: 2024

Type: article

Abstract: The constraint correction methodology for defect assessment is not widely applied in fitness-for-service codes in the nuclear industry and there are a limited number of testing standards to account for low-constraint testing. In this work, high and low-constraint SE(B) and SE(T) testing was performed on two different types of alloy steels using low constraint specimens with thickness of 10 mm. New quality assurance measures related to selection of testing temperature, crack front straightness, and compliance for low constraint specimens are suggested. The results show that the SE(B) specimens are sensitive to CMOD measurement point location. Future work should be focused on improving and validating the instrumentation and analysis practices for low constraint specimens. Yet, the obtained SE(T) T0 values follow models predicting the effect of constraint loss developed using larger specimens. The work impacts the development of quality criteria for future low constraint testing standards.

Source: Engineering Fracture Mechanics

DOI: 10.1016/j.engfracmech.2024.110434

Authors: Sebastian Lindqvist, Antti Forsström, Timo Veijola, William Collins

Institutions: VTT Technical Research Centre of Finland, University of Kansas

Language: English

Topic: Fatigue and fracture mechanics

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,000

Funders: University of Kansas, Teknologian Tutkimuskeskus VTT, Fulbright Suomi -säätiö, H2020 Euratom