Fatigue crack propagation in haynes 230: A comparison between single and polycrystal crack closure levels

S. Beretta, S. Foletti, S. Rabbolini, H. Sehitoglu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An experimental campaign was developed to evaluate fatigue crack growth in Haynes 230. The effects of plasticity induced crack closure were investigated with Digital Image Correlation. In particular, crack opening levels were measured with the digital extensometer technique, which allowed the evaluation of crack flanks relative displacements. Experimental results were compared with a reference da/dn-ΔKeff curve and with the data of a previous study, which analyzed single crystal propagation. It was found that the adoption of crack closure local measurements provided an accurate estimation of crack propagation driving forces, since all the experimental points from single crystals and polycrystals collapse onto the da/dn-ΔKeff curve.

Original languageEnglish (US)
Title of host publicationMaterials Structure and Micromechanics of Fracture VIII
EditorsPavel Sandera
PublisherTrans Tech Publications Ltd
Pages243-248
Number of pages6
ISBN (Print)9783038356264
DOIs
StatePublished - 2017
Event8th International Conference on Materials Structure and Micromechanics of Fracture, MSMF8 - Brno, Czech Republic
Duration: Jul 27 2016Jul 29 2016

Publication series

NameSolid State Phenomena
Volume258 SSP
ISSN (Print)1012-0394
ISSN (Electronic)1662-9779

Other

Other8th International Conference on Materials Structure and Micromechanics of Fracture, MSMF8
CountryCzech Republic
CityBrno
Period7/27/167/29/16

Keywords

  • Crack closure
  • Crack propagation
  • Fatigue
  • Stress intensity factor range
  • Superalloy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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  • Cite this

    Beretta, S., Foletti, S., Rabbolini, S., & Sehitoglu, H. (2017). Fatigue crack propagation in haynes 230: A comparison between single and polycrystal crack closure levels. In P. Sandera (Ed.), Materials Structure and Micromechanics of Fracture VIII (pp. 243-248). (Solid State Phenomena; Vol. 258 SSP). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.258.243