Phase field approach for nanoscale interactions between crack propagation and phase transformation

Jafarzadeh, H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1039/c9nr05960a
  3. Publisher: Royal Society of Chemistry , 2019
  4. Abstract:
  5. The phase field approach (PFA) for the interaction of fracture and martensitic phase transformation (PT) is developed, which includes the change in surface energy during PT and the effect of unexplored scale parameters proportional to the ratio of the widths of the crack surface and the phase interface, both at the nanometer scale. The variation of these two parameters causes unexpected qualitative and quantitative effects: shift of PT away from the crack tip, "wetting" of the crack surface by martensite, change in the structure and geometry of the transformed region, crack trajectory, and process of interfacial damage evolution, as well as transformation toughening. The results suggest additional parameters controlling coupled fracture and PTs. © The Royal Society of Chemistry 2019
  6. Keywords:
  7. Crack propagation ; Martensitic transformations ; Phase interfaces ; Wetting ; Crack trajectory ; Interfacial damages ; Martensitic phase transformations ; Nano-meter scale ; Nanoscale interactions ; Phase-field approaches ; Quantitative effects ; Transformation toughening ; Crack tips
  8. Source: Nanoscale ; Volume 11, Issue 46 , 2019 , Pages 22243-22247 ; 20403364 (ISSN)
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2019/nr/c9nr05960a#!divAbstract