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research-article

The Application of Miniaturized Three-Point-Bend Specimens for Determination of the Reference Temperature of JRQ steel

[+] Author and Article Information
Ludek Stratil

Institute of Physics of Materials, Academy of Sciences of the Czech republic, v. v. i. Zizkova 22, 616 62, Brno, Czech Republic
stratil@ipm.cz

Filip Siska

Institute of Physics of Materials, Academy of Sciences of the Czech republic, v. v. i. Zizkova 22, 616 62, Brno, Czech Republic
siska@ipm.cz

Ivo Dlouhy

CEITEC Institute of Physics of Materials, Academy of Sciences of the Czech republic, v. v. i. Zizkova 22, 616 62, Brno, Czech Republic
idlouhy@ipm.cz

Marta Serrano

Ciemat - Structural Materials Division Avda. Complutense 22, 280 40, Madrid, Spain
marta.serrano@ciemat.es

1Corresponding author.

ASME doi:10.1115/1.4036532 History: Received January 15, 2016; Revised April 13, 2017

Abstract

This contribution deals with determination of the reference temperature of JRQ steel using miniaturized specimens. The dimensions of used miniaturized specimens were 3 × 4 × 27 mm (thickness × width × length). This specimen type offers the utilization of limited amount of test material or broken halves of pre-cracked Charpy and larger specimens. The test material comes from the broken halves of 0.5T SEB specimens previously tested for purposes of the reference temperature determination in Ciemat, Madrid. The fracture toughness tests of the specimens were performed in the transition region of the steel according to the recommendations of standard ASTM E1921 and according to Wallin’s recommended temperature range for miniaturized specimens. The determined reference temperature of the Master Curve was very similar to the determined ones from three point bend specimen of sizes 0.2T, 0.4T and 0.5T. The obtained results confirm a necessity of conduct of tests at low temperatures and testing sufficient number of specimens in order to generate enough valid data for determination of the reference temperature.

Copyright (c) 2017 by ASME
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