Growth mechanisms of modified eutectic silicon

Unterschiedliche Methoden für die Lebensdauerabschätzung unter variablen Beanspruchungsamplituden wurden basierend auf Versuchen mit Proben aus dem Stahl ZStE340 analysiert und miteinander verglichen. Einige der bekanntesten und am meisten angewendeten Methoden wurden gewählt: der Schädigungsparameter PSWT; der PJ-parameter, basiert auf der Bruchmechanik kurzer Risse; das Non-Linear-Continuous Damage Model (NLCD), basiert auf der Kontinuumsmechanik und der Energieparameter von Ellyin. Jede Methode wurde dargestellt und diskutiert. Die Basis für die Ermittlung der Abschätzungsgüte waren experimentelle Versuchsergebnisse aus ZStE340 Proben im Ausgangszustand und nach dem Spaltprofilierprozess. Der Schädigungsparameter PSWT erwies bessere Ergebnisse und ist für die Lebensdauerabschätzung von ZStE340 geeignet

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“…Following the formulation the effective value of the J-integral during each cycle can be written as [17,18]:…”

Section: Parameter P Jmentioning

confidence: 99%

Analysis of different fatigue damage accumulation theories and damage parameters based on experiments with the steel HC340LA

Palma

Tomasella

Frendo

et al. 2016

Materialwissenschaft Werkst

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“…Previous studies on the morphology and growth mechanisms of primary Si in Al-Si alloys largely employed ex situ methods. [8][9][10][11][12] The growth mechanisms of primary Si are determined usually indirectly by analyzing growth traces. [12] One of the key inferences based on such analyses is that fast-growing interfaces such as {113} grow out, leaving behind prominent {111} facets.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Analyses of the Growth and Dissolution Phenomena of Primary Si and α-Al in Partially Molten Al-Si (-Cu-Mg) Alloy Particles Using In Situ Transmission Electron Microscopy

Eswara

Howe

2010

Metall Mater Trans A

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The growth and dissolution behavior of primary Si and a-Al in partially molten hypereutectic Al-Si-based alloy particles was investigated using in situ TEM to reveal the dynamic and instantaneous processes occurring during these phenomena. Direct evidence for the preferential growth of Si {113} facets compared with {111} facets resulting in prominent {111} facets bounding the Si crystals was obtained. The nucleation of primary Si was found to occur heterogeneously on the encapsulating alumina shell, whereas the a-Al phase nucleated homogeneously from the liquid Al-Si phase. The morphology of primary Si during growth was found to be highly faceted during growth but smoothly curved during dissolution, revealing fundamental mechanistic differences during these processes. We provide a ledge-based interpretation to explain the difference in growth and dissolution behavior. The a-Al phase displayed smoothly curved growth and dissolution morphologies, which are characteristic of an isotropic interfacial energy and a continuous growth mechanism.

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“…At high cooling rate, more developed, rough solid/ liquid interface seemed to be more advantageous to join the new atoms to the crystal of the α c -AlFeMnSi phase. This morphological phenomenon, might be explained by general assumptions of Perpendicular Macroscopic Growth theory, describing evolution of the eutectic silicon crystals morphology, subjected to chemical modification [20]. have taken a shape of the faceted polyhedra, of habit subordinated to the local preferences for the crystallographic planes growth.…”

Section: Evolution Of the Alfemnsi Intermetallics Morphology As Affecmentioning

confidence: 99%

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Warmuzek

2017

Archives of Metallurgy and Materials

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In this paper the results of the microscopic observations of the intermetallic AlFeMnSi phases crystals formed in the liquid hypo-and eutectic AlSi alloys containing transition metals 3.0 wt.% Fe and 0.1, 0.5 and 2.0 wt.% Mn were presented. The crystals morphology has been revealed on both polished and deep etched microsections. The different stages of the primary AlFeMnSi phases particles formation in the solidifying alloy and their final morphology were shown as influenced by cooling rate and alloy chemical composition.

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Growth mechanisms of modified eutectic silicon

Cited by 13 publications

References 11 publications

Analysis of different fatigue damage accumulation theories and damage parameters based on experiments with the steel HC340LA

Analysis of different fatigue damage accumulation theories and damage parameters based on experiments with the steel HC340LA

Kinetic Analyses of the Growth and Dissolution Phenomena of Primary Si and α-Al in Partially Molten Al-Si (-Cu-Mg) Alloy Particles Using In Situ Transmission Electron Microscopy

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

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