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On instabilities of growing bi-material interfaces
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för maskinteknik.
Divison of soild mechancis, LTH, SWE.
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för maskinteknik.
2019 (engelsk)Inngår i: Procedia Structural Integrity, ICIS2019, Elsevier, 2019, Vol. 17, s. 850-856Konferansepaper, Publicerat paper (Fagfellevurdert)
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

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 17, s. 850-856
Serie
Procedia, ISSN 2452-3216
HSV kategori
Identifikatorer
URN: urn:nbn:se:bth-18710DOI: 10.1016/j.prostr.2019.08.113ISI: 000505162900112OAI: oai:DiVA.org:bth-18710DiVA, id: diva2:1355414
Konferanse
3rd International Conference on Structural Integrity, ICSI 2019, 2-5 September 2019, Funchal, Madeira, Portugal
Forskningsfinansiär
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 18-489
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Tilgjengelig fra: 2019-09-27 Laget: 2019-09-27 Sist oppdatert: 2020-01-23bibliografisk kontrollert

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