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Modelling the formation and self-healing of creep damage in iron-based alloys

Versteylen, C. ; Sluiter, M. ; Dijk, N.

Journal of Materials Science, 2018, Vol.53(20), pp.14758-14773 [Tạp chí có phản biện]

ISSN: 0022-2461 ; E-ISSN: 1573-4803 ; DOI: 10.1007/s10853-018-2666-9

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  • Nhan đề:
    Modelling the formation and self-healing of creep damage in iron-based alloys
  • Tác giả: Versteylen, C. ; Sluiter, M. ; Dijk, N.
  • Chủ đề: Engineering
  • Là 1 phần của: Journal of Materials Science, 2018, Vol.53(20), pp.14758-14773
  • Mô tả: A self-consistent model is applied to predict the creep cavity growth and strain rates in metals from the perspective of self-healing. In this model, the creep cavity growth rate is intricately linked to the strain rate. The self-healing process causes precipitates to grow inside creep cavities. Due to the Kirkendall effect, a diffusional flux of vacancies is induced in the direction away from the creep cavity during this selective self-healing precipitation. This process impedes the creep cavity growth. The critical stress for self-healing can be derived, and an analysis is made of the efficiency of self-healing elements in binary Fe–Cu, Fe–Au, Fe–Mo, and Fe–W alloys. Fe–Au is found to be the most efficient self-healing alloy. Fe–Mo and Fe–W alloys provide good alternatives that have the potential to be employed at high temperatures.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461 ; E-ISSN: 1573-4803 ; DOI: 10.1007/s10853-018-2666-9

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