Evolution of characteristic pattern parameters in directional solidification of thin samples of a dilute AlCu alloy

Grange, G.; Gastaldi, J.; Jourdan, C.; Billia, B.

doi:10.1016/0022-0248(95)00030-5

Cited by 53 publications

(18 citation statements)

References 25 publications

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“…This is in agreement with previous studies on the onset of the morphological instability performed during horizontal solidification of Al-Cu alloys by Grange et al using synchrotron X-ray topography. [20] Yet, aluminum grains become highly stressed when the remaining liquid in contact with the crucible wall solidifies, forming a eutectic phase, as shown by the strong black contrasts at the bottom of each topograph in Figure 4(c). The strain induced by the eutectic entrapment will be further described later.…”

Section: B Observation Of the Initial Solidification Transientmentioning

confidence: 99%

“…A more accurate study of cellular spacing was performed for Al-Cu alloys by Grange et al, assuming that the topographs do not display large distortions of the microstructure morphology. [20] The comparison of the measurements with available data on the same alloy brought out the influence of convection in the melt on the primary spacing and tip radius and on the celldendrite transition. Regarding the development of stresses and strains generated by microstructure formation, Grange et al evidenced strain contrast preceding visible interface corrugation during the horizontal solidification of Al-Cu alloys.…”

Section: Introductionmentioning

confidence: 99%

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In-Situ and Real-Time Analysis of the Formation of Strains and Microstructure Defects during Solidification of Al-3.5 Wt Pct Ni Alloys

Reinhart

Buffet

Nguyen-Thi

et al. 2008

Metall Mater Trans A

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Alloy solidification was investigated in situ and real time by using a unique experimental setup developed at the European Synchrotron Radiation Facility (ESRF) combining both synchrotron X-ray radiography and topography. Although synchrotron X-ray radiography enables the investigation of the solid-liquid interface of metallic alloys, white-beam synchrotron X-ray topography enables the investigation of the formation of strains and defects formation in the growing solid microstructure. In this article, we present results obtained during directional solidification experiments performed with Al-3.5 wt pct Ni samples. First, the initial state after thermal stabilization is characterized. Next, the interface morphological instability and the transition to the columnar growth regime are thoroughly investigated. Topography observation shows that several parts of each dendrite become disoriented while the microstructure is developing. Disorientations are quantified and the aluminum yield stress at the melting point is estimated from the bending of secondary arms. Last, coupled growth of eutectic and dendrites settles with the formation of the eutectic phase. The eutectic grains grow strained and the dendrites concomitantly undergo additional stress.

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Section: B Observation Of the Initial Solidification Transientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-Situ and Real-Time Analysis of the Formation of Strains and Microstructure Defects during Solidification of Al-3.5 Wt Pct Ni Alloys

Reinhart

Buffet

Nguyen-Thi

et al. 2008

Metall Mater Trans A

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“…For they are transparent, growing crystals can be studied with a microscope, but none of these analog systems included an opaque alloying element that could represent the solidification of metallic alloy. Equilibrium processes like planar and cellular growth in metals have been investigated by conventional X-ray microradiography, but the spatiotemporal resolutions are not sufficient for studying dendritic growth [7].…”

Section: Introductionmentioning

confidence: 99%

In situ study on dendrite growth of metallic alloy by a synchrotron radiation imaging technology

Wang

et al. 2010

Sci. China Technol. Sci.

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This study was trying to observe the real-time dendrite growth of Sn-Bi and Sn-Pb binary alloys by a synchrotron radiation imaging technology. The imaging system includes an intense and high brightness synchrotron radiation source, a high-resolution and fast-readout charge coupled device camera, an alloy sample and a Bridgman solidification system. The imaging experiments were done at Beijing Synchrotron Radiation Facility with an updated synchrotron radiation imaging technique, diffraction-enhanced imaging, which was firstly used to study the dendrite growth of metallic alloy. A series of growth behavior and morphology evolution of dendrite have been in situ observed, such as columnar-to-equiaxed transition, dendrite competition, dendrite fragmentation and floating, etc., which can offer the direct proofs to verify or improve the solidification theories of metallic alloy. This research opens a novel window for the study of alloy solidification and enables the unambiguous understanding of solidification processes in optically opaque, metallic alloys. dendritic growth, synchrotron radiation, solidification, diffraction-enhanced imaging, metal and alloys Citation:Wang T M, Xu J J, Li J, et al. In situ study on dendrite growth of metallic alloy by a synchrotron radiation imaging technology.

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“…In the past couple of decades, the emergence of intense and coherent x-ray sources has paved the way for in situ observations of solidification in technologically relevant metal alloys at increasing spatial and temporal resolutions. [19,20] The use of x-rays for radiography, [10,[21][22][23] topography, [24][25][26] and tomography [27][28][29] may arguably be regarded as the most significant innovation in the study of in situ solidification and crystal growth since the inception of transparent organic analogs in the 1960 s. [30] For decades, transparent organic analogs have shed light on numerous outstanding scientific challenges in the field of non-equilibrium pattern formation. [31][32][33][34][35][36] However, these analogs remain different from metal alloys in several critical aspects (e.g.…”

mentioning

confidence: 99%

X‐ray Imaging and Controlled Solidification of Al‐Cu Alloys Toward Microstructures by Design

et al. 2015

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Evolution of characteristic pattern parameters in directional solidification of thin samples of a dilute AlCu alloy

Cited by 53 publications

References 25 publications

In-Situ and Real-Time Analysis of the Formation of Strains and Microstructure Defects during Solidification of Al-3.5 Wt Pct Ni Alloys

In-Situ and Real-Time Analysis of the Formation of Strains and Microstructure Defects during Solidification of Al-3.5 Wt Pct Ni Alloys

In situ study on dendrite growth of metallic alloy by a synchrotron radiation imaging technology

X‐ray Imaging and Controlled Solidification of Al‐Cu Alloys Toward Microstructures by Design

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