Effect of solidification rate on the microstructure and microhardness of a melt-spun Al–8Si–1Sb alloy

Karaköse, Ercan; Keskín, Mustafa

doi:10.1016/j.jallcom.2009.01.006

Cited by 41 publications

(19 citation statements)

References 23 publications

(54 reference statements)

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“…The microhardness values were higher than previously reported values of Al-12Si SLM parts using CW lasers at $55-107 HV 9 and $115 HV. 16 A similar concept has been demonstrated by Karaköse et al, 33 where further increases in microhardness were obtained by refining Si grain size though rapid solidification process in Al-8Si-1Sb alloy. As the hardness of Al-Si alloys greatly depend on no only the grain size but also the size and distribution of the Si phase throughout the matrix.…”

Section: Solidification Microstructuresupporting

confidence: 60%

Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting

Chou

Milligan

Paliwal

et al. 2015

JOM

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Additive manufacturing (AM) of metallic materials is experiencing a research and commercialization craze in almost all industrial sectors. However, to date, AM has been limited to a small numbers of alloys. With respect to aluminum, two alloys received some attention: Al-12Si and Al-10Si-1Mg. In both cases, fully dense components have been achieved using a continuous-wave selective laser melting system. In this article, a new approach of selective laser melting using a pulsed-laser source as opposed to a continuous-wave laser is proposed. Pulse selective laser melting (P-SLM) would allow for greater control over the heat input and thus further optimization possibilities of the microstructure. P-SLM was demonstrated using the Al-12Si system. Si refinement below 200 nm was achieved throughout the component. Density up to 95% and high hardness of above 135 HV were obtained. The solidification mechanism is also explained.

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Section: Solidification Microstructuresupporting

confidence: 60%

Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting

Chou

Milligan

Paliwal

et al. 2015

JOM

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“…The Sb addition to AM60 Mg alloys and found that the grain size of the samples depending on the increase of Sb content decreased and the hardness value increased [35]. The cooling ratio of the sample can affect the grain size of the samples and so microhardness values [39]. So the fluctuation of the microhardness value is related to cooling ratio, grain size, grain environment, the phases around the grains and the diffusion of the other elements in the grains.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Thermal and mechanical properties of La–Al–Sb alloys

Altın

Öz

Demirel

et al. 2014

J Mater Sci: Mater Electron

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We fabricated La-Al-Sb alloy by arc melter system and the fabrication conditions were described in detail. Microstructural analyses were performed and it was found that LaSb, Al 11 La 3 Al 4 La, AlLa 3 and Sb phases formed for different heat treatment conditions. The resistivity results showed the metallic and semiconducting type behavior depending on heat treatment temperatures. The thermal-conductivity measurement was performed in the range of 2-300 K and the data were analyzed by the sum of lattice and carrier components. The linear temperature dependence of thermo power indicates metallic type characteristic of the samples. The micro-hardness values of the phases in the samples were analyzed and it was found that there are two different hardness regions in the samples.

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“…The other important point is decrease of the AlSb phase region can cause cooling rate of this region should be faster than the other regions and so we predicted that the cooling ratio of the phase region is one of the important factor for the hardness values. Karakose and Keskin [45] were investigated the hardness value for Al-8Si-1Sb alloys depending on the cooling ratio and they indicated that the cooling ratio affected the grain size and so micro-hardness of the samples.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Thermoelectric and mechanical properties of Mg–Al–Sb alloys

Altın

Öz

Erdem

et al. 2014

J Mater Sci: Mater Electron

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We fabricated Mg-Al-Sb alloy by arc melting system. Microstructural analyses were performed and it was found that only Mg 3 Sb 2 and AlSb phases formed for different heat treatment conditions. The phase transition at 580°C according to DTA analysis was determined as partial melting and it was supported by phase analyses studies in the literature. The resistivity results showed the metallic and the semiconducting type behavior depending on the heat treatment temperatures. The thermal conductivity measurement was performed in the range of 2-300 K and the data were analyzed by the sum of lattice and carrier components. The thermopower data showed negative and positive values which indicate the sign of total carriers. The linear temperature dependence of thermopower indicates metallic type characteristic of the samples. Mechanical properties of the sample showed two type hardness values dependent on heat treatment temperature.

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Effect of solidification rate on the microstructure and microhardness of a melt-spun Al–8Si–1Sb alloy

Cited by 41 publications

References 23 publications

Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting

Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting

Thermal and mechanical properties of La–Al–Sb alloys

Thermoelectric and mechanical properties of Mg–Al–Sb alloys

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