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On instabilities of growing bi-material interfaces
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
Divison of soild mechancis, LTH, SWE.
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
2019 (English)In: Procedia Structural Integrity, ICIS2019, Elsevier, 2019, Vol. 17, p. 850-856Conference paper, Published paper (Refereed)
Abstract [en]

This study concerns with 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

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 17, p. 850-856
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:bth-18710DOI: 10.1016/j.prostr.2019.08.113OAI: oai:DiVA.org:bth-18710DiVA, id: diva2:1355414
Conference
3rd International Conference on Structural Integrity, ICSI 2019, 2-5 September 2019, Funchal, Madeira, Portugal
Funder
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 18-489
Note

open access

Available from: 2019-09-27 Created: 2019-09-27 Last updated: 2019-10-09Bibliographically approved

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fulltext(794 kB)14 downloads
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Reheman, WureguliKao-Walter, Sharon

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  • apa
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