On instabilities of growing bi-material interfaces
(2019) 3rd International Conference on Structural Integrity, In Procedia Structural Integrity 17. p.850-856- 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... (More)
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.
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- author
- Reheman, Wureguli ; Ståhle, Per LU and Kao-Walter, Sharon
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bi-material, Instability, Waviness, Growth rate
- in
- Procedia Structural Integrity
- volume
- 17
- pages
- 7 pages
- publisher
- Elsevier
- conference name
- 3rd International Conference on Structural Integrity,
- conference location
- Portugal
- conference dates
- 2019-09-02 - 2019-09-05
- external identifiers
-
- scopus:85074644091
- ISSN
- 2452-3216
- DOI
- 10.1016/j.prostr.2019.08.113
- language
- English
- LU publication?
- yes
- id
- d25cebfc-571f-4fb3-8baf-5096a5f67087
- date added to LUP
- 2019-08-26 00:03:19
- date last changed
- 2022-04-18 19:07:06
@article{d25cebfc-571f-4fb3-8baf-5096a5f67087,
abstract = {{<p>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.</p>}},
author = {{Reheman, Wureguli and Ståhle, Per and Kao-Walter, Sharon}},
issn = {{2452-3216}},
keywords = {{Bi-material; Instability; Waviness; Growth rate}},
language = {{eng}},
pages = {{850--856}},
publisher = {{Elsevier}},
series = {{Procedia Structural Integrity}},
title = {{On instabilities of growing bi-material interfaces}},
url = {{https://lup.lub.lu.se/search/files/71874634/ICIS2019_0518.pdf}},
doi = {{10.1016/j.prostr.2019.08.113}},
volume = {{17}},
year = {{2019}},
}