The dynamic nature of hydrogen assisting crack extension

• Autorzy: Katz Y. , Tymiak N. , Gerberich W. W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Purpose of this paper to develop new avenues into the understanding of hydrogen/deformation interactions Design/methodology/approach: Metastable stainless steel mainly polycrystalline FCC system was selected. The interactive fracture problems enjoyed the assistance of fracture mechanics theory and methodology. Regarding hydrogen embrittlment the study leans towards generic hydrogen enhanced decohesion model allowing quantitative engagement with experiments. Mechanical response was tracked by contact mechanics methodology. Nano indentation beside continues scratch tests have been supplemented by visualization and measurements utilizing Scanning Probe Microscopy (SPM). Findings: It was shown that hydrogen increased the load onsets for dislocations nucleation in metastable austenitic stainless steel by at least a factor of two, whereupon the yield point recovered after hydrogen outgases. Plasticity localization due to hydrogen was also substantiated. Research limitations/implications: The nano mechanical approach allowed additional critical experiment of hydrogen/deformation affects to be programmed. Originality/value: Fracture is a localized phenomenon and the fine scale features information on high resolution observations opened potential contribution by exploring small volume research activities.

Słowa kluczowe

EN

metallic alloys; crack resistance; hydrogen/deformation interaction; nano testing

PL

stopy metali; odporność na pękanie; wodór

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 123--126
• Opis fizyczny: Bibliogr. 15 poz., tab., wykr.

Twórcy

autor

Katz Y.

• The Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis MN 55455, U.S.A

autor

Tymiak N.

• The Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis MN 55455, U.S.A

autor

Gerberich W. W.

• The Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis MN 55455, U.S.A

Bibliografia

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