RESQUE: Determination of the lowest acceptable insert length for reconstituted Cv-impact and precracked Cv specimen

E. Keim, R. Langer, E. van Walle, M. Scibetta, M.J. Valo, H-W. Viehrig, H. Richter, T. Atkins, M.R. Wootton, L. Debarberis, M. Horsten

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

6 Citations (Scopus)

Abstract

One of the tasks within the framework of the EU “RESQUE”- project was to determine the lowest acceptable insert length for reconstituted Charpy V impact (Cv) and pre-cracked Charpy V (PC Cv) specimens. In order to obtain an optimized insert length, Cv impact specimens with three insert lengths ranging from 10 to 20 mm and fracture toughness PC Cv specimens with two different insert lengths of a reference material were manufactured by stud-welding or electron-beam welding and tested under various test conditions. Cv tests on reconstituted specimens exhibited the normal scatter in Charpy energies and that there was no significant influence of the insert length on the transition temperatures. However, the 10 mm insert caused a reduction in the upper shelf energy of 10–15%. The fracture toughness tests carried out in the transition regime showed that the 10 mm insert resulted in a lower estimate (non-conservative) of T0 compared with the values measured on 12mm insert and baseline specimens. It is therefore recommended that at least 12 mm long inserts should be used for fracture toughness testing in the transition region. In the ductile region a trend to lower initiation toughness values at higher temperatures was observed. To avoid this, 20 mm long inserts should be used for J-Δa curves at higher temperatures.
Original languageEnglish
Title of host publicationSmall Specimen Test Techniques
EditorsMikhail Sokolov, John D. Landes, Glenn E. Lucas
PublisherAmerican Society for Testing and Materials (ASTM)
Pages426-437
Volume4
ISBN (Electronic)978-0-8031-5465-0
ISBN (Print)978-0-8031-2897-2
DOIs
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication
Event4th Symposium on Small Specimen Test Technique - Reno, United States
Duration: 23 Jan 200125 Jan 2001

Publication series

SeriesASTM Selected Technical Papers
Volume1418

Conference

Conference4th Symposium on Small Specimen Test Technique
Country/TerritoryUnited States
CityReno
Period23/01/0125/01/01

Keywords

  • reconstitution technique
  • Charpy testing
  • pre-cracked Charpy, T0 determination
  • insert length
  • fracture resistance

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