Evaluating the Conditions When Warm Pre-stressing does not Produce a Benefit in Apparent Toughness

Derreck Van Gelderen, Julian D Booker, David J Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
279 Downloads (Pure)

Abstract

Warm pre-stressing (WPS) is the process of subjecting a pre-cracked component to a load cycle at a temperature higher than subsequent operating temperatures. This process is widely acknowledged as being able to enhance the load to fracture, especially in ferritic steels which exhibit lower shelf cleavage fracture. Although accurate estimates of the toughness distributions can be obtained, the accuracy of WPS predictions may be limited by the sample size. It can be argued that the experiments conducted to date are devised to show that the WPS enhancement is always successful, however there are circumstances when a specimen might fail prematurely during the WPS path. Focus is drawn on predicting the number of prematurely failed specimens at different temperatures and pre-load levels.
Original languageEnglish
Pages (from-to)S401–S407
Number of pages7
JournalMaterials Today: Proceedings
Volume2
Issue numberSupplement 2
Early online date25 Jun 2015
DOIs
Publication statusPublished - 2015
EventJoint 3rd UK-China Steel Research Forum & 15th CMA-UK Conference on Materials Science and Engineering - Rutherford Appleton Laboratory, Harwell, Oxford, United Kingdom
Duration: 10 Jul 201411 Jul 2014

Keywords

  • Fracture Toughness
  • Monte Carlo Simulation
  • Warm Pre-stress
  • Chell model

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