On instabilities of growing bi-material interfaces

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

This study concerns the evolution of morphological patterns that often arise on the interface of bi-material, so called metal precipitate phase, due to the instability of the interfaces. The instability leads to growth or retraction of small perturbation, which may determine the formation of a variety of morphological patterns initially arising on surfaces of growing precipitates at small length scales. To better understand the cause of different patterns on the bi-material interfaces, an analytical study of the stability of the precipitate-matrix interface is performed. First, a wavy interface perturbation is used to examine the spontaneous variations that occur at the precipitate-matrix interface. Then, the analysis utilises Cerruti?s solution to compute the perturbed stress field surrounding the interface. It is shown that a virtually flat interface subjected to tension is in general unstable. The amplitude of sinusoidal perturbations decays for short wave lengths and grow for longer wave lengths. Both a critical wave length for which the perturbation amplitude is unaffected and a specific ditto which obtain maximum perturbation growth rate are derived.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Blekinge Institute of Technology
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Matematik
  • Metallurgi och metalliska material

Nyckelord

Originalspråkengelska
Sidor (från-till)850-856
Antal sidor7
TidskriftProcedia Structural Integrity
Volym17
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa
Evenemang3rd International Conference on Structural Integrity, - , Portugal
Varaktighet: 2019 sep 22019 sep 5
https://www.icsi.pt/

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