Microstructure characterization of rapidly solidified Al–Fe–Cr–Ce alloy by positron annihilation spectroscopy

Michalcová, Alena; Vojtěch, Dalibor; Čı́žek, Jakub; Procházka, I.; Drahokoupil, Jan; Novák, Pavel

doi:10.1016/j.jallcom.2010.12.049

Cited by 21 publications

(11 citation statements)

References 34 publications

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“…The very short timeframe is caused by high cooling rate during melt spinning (10 5 e10 7 K/s [10]). The presence of high density of dislocations in the melt-spun Al alloys has also been reported elsewhere [13,16].…”

Section: Introductionsupporting

confidence: 62%

“…1a shows the planar-view OM microstructure of the as-melt spun 7075 Al ribbons, and it contains both sub-micrometric and micrometric grains. Grain sizes were measured from a series of OM 100~0.17 [13] images using linear intercept method per ASTM E112 [18]. Based on analysis of randomly selected 474 grains, the statistical distribution of grain sizes was obtained, as displayed in Fig.…”

Section: Methodsmentioning

confidence: 99%

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Melt spinning induces sub-micrometric/micrometric grained structure and dislocations in 7075 Al alloy

Lin

Mao

Yan

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionsupporting

confidence: 62%

Section: Methodsmentioning

confidence: 99%

Melt spinning induces sub-micrometric/micrometric grained structure and dislocations in 7075 Al alloy

Lin

Mao

Yan

et al. 2015

Journal of Alloys and Compounds

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“…An overlooked, yet important, feature of these microstructures is the formation of various types of crystalline defects [ 8 ]. These include trapping of excess point defects [ 9 ], formation of high dislocation densities [ 10 – 12 ], cavitation or microvoiding [ 10 , 13 , 14 ], high microstructural (type II-III) residual stresses [ 15 , 16 ] and so-called lattice orientation gradients [ 17 ]. These crystalline defects critically affect the material’s mechanical properties and performance.…”

Section: Introductionmentioning

confidence: 99%

Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Pinomaa

Lindroos

Jreidini

et al. 2022

Phil. Trans. R. Soc. A.

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Rapid solidification leads to unique microstructural features, where a less studied topic is the formation of various crystalline defects, including high dislocation densities, as well as gradients and splitting of the crystalline orientation. As these defects critically affect the material’s mechanical properties and performance features, it is important to understand the defect formation mechanisms, and how they depend on the solidification conditions and alloying. To illuminate the formation mechanisms of the rapid solidification induced crystalline defects, we conduct a multiscale modelling analysis consisting of bond-order potential-based molecular dynamics (MD), phase field crystal-based amplitude expansion simulations, and sequentially coupled phase field–crystal plasticity simulations. The resulting dislocation densities are quantified and compared to past experiments. The atomistic approaches (MD, PFC) can be used to calibrate continuum level crystal plasticity models, and the framework adds mechanistic insights arising from the multiscale analysis. This article is part of the theme issue ‘Transport phenomena in complex systems (part 2)’.

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“…The result obtained by us deviated from the results in other research somehow. For example, in the research by Michalcová, the spray‐formed Al–Fe–Cr–Ce tends to have stronger preferred orientation in (111) planes . The preferred orientation on (200) plane suggest that the crystal growth on this plane was largely suppressed.…”

Section: Resultsmentioning

confidence: 98%

Microstructure and elevated temperature mechanical properties of Al–8Fe–4RE alloy fabricated by spray forming

Hong

Zhang

Zhao

et al. 2014

Materialwissenschaft Werkst

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Al–8Fe–4Ce alloy is currently manufactured by consolidating the atomized powders. With the aim to reduce the cost, spray forming process was applied in manufacturing with misch metal as raw materials. Spray forming (SF) as well as casting were employed to prepare Al–8Fe–4RE alloy, followed by hot‐press to compact the samples. The mechanical properties of SFed and cast Al–8Fe–4RE alloys are characterized at a temperature of 350 °C. The results show that the Al3Fe phases contained in SF alloy is comparatively refined, forming needle‐shaped phases embedded in the Al matrix, and the SF alloy also showed lower degree of preferred orientation in (111) plane. Although both factors might explain the superior performance of the SF sample, the fracture appearance after tensile test at 350 °C shows that the contribution from crystallographic feature might be predominant. Spray forming is proved to be a very promising technique for manufacture of Al–Fe–Ce alloys of high strength at an elevated temperature.

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Microstructure characterization of rapidly solidified Al–Fe–Cr–Ce alloy by positron annihilation spectroscopy

Cited by 21 publications

References 34 publications

Melt spinning induces sub-micrometric/micrometric grained structure and dislocations in 7075 Al alloy

Melt spinning induces sub-micrometric/micrometric grained structure and dislocations in 7075 Al alloy

Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Microstructure and elevated temperature mechanical properties of Al–8Fe–4RE alloy fabricated by spray forming

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