Effect of solidification parameters on mechanical properties of directionally solidified Al-Rich Al-Cu alloys

Çadırlı, Emin

doi:10.1007/s12540-013-3006-x

Cited by 65 publications

(44 citation statements)

References 37 publications

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“…Using the vacuum melting and hot filling furnaces 12,13 , Al-1.9Mn-xFe alloys (x=0.5, 1.5 and 5 wt.%) alloys have been prepared under vacuum atmosphere by using 99.99 % purity metals taking into account the phase diagram as shown Fig. 1 14 .…”

Section: Sample Preparation and Directional Solidificationmentioning

confidence: 99%

“…2). The block diagram of the experimental design and details of the Bridgman-type directional solidification furnace are given in previous studies 12,13 . In the experimental technique, the sample was heated about 100 K above the melting temperature and solidification of the samples was carried out at a constant temperature gradient, G (6.7 K/mm) under various growth velocities (8.3-978 μm/s) in a Bridgman-type directional solidification furnace.…”

Section: Sample Preparation and Directional Solidificationmentioning

confidence: 99%

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Influences of Growth Velocity and Fe Content on Microstructure, Microhardness and Tensile Properties of Directionally Solidified Al-1.9Mn-xFe Ternary Alloys

et al. 2017

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In this study, influences of growth velocity and composition (Fe content) on the microstructure (rod spacing) and mechanical properties (microhardness, ultimate tensile strength and fracture surface) of Al-Mn-Fe ternary alloys have been investigated. Al-1.9 Mn-xFe (x=0.5, 1.5 and 5 wt. %) were prepared using metals of 99.99% high purity in the vacuum atmosphere. At a constant temperature gradient (6.7 K/mm), these alloys were directionally solidified upwards under various growth velocities (8.3-978 μm/s) using a Bridgman-type directional solidification furnace. The results show that two kinds of Al-rich α-Al phase and Fe-rich intermetallic (Al 6 FeMn) phase may be present in the final microstructures of the alloys when the Fe content increases from 0.5 wt.% to 5 wt.%. Al 6 FeMn intermetallic rod spacing, microhardness and ultimate tensile strength were measured and expressed as functions of growth velocity and Fe content by using a linear regression analysis method. According to experimental results, the microhardness and ultimate tensile strength of the solidified samples increase with increase in the growth velocity and Fe content and decrease in rod spacing. The elongations of the alloys decrease gradually with increasing growth velocity and Fe content.

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Section: Sample Preparation and Directional Solidificationmentioning

confidence: 99%

Section: Sample Preparation and Directional Solidificationmentioning

confidence: 99%

Influences of Growth Velocity and Fe Content on Microstructure, Microhardness and Tensile Properties of Directionally Solidified Al-1.9Mn-xFe Ternary Alloys

et al. 2017

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“…It should be emphasized that smaller primary dendritic spacing were obtained for higher growth rate and cooling rate, as can be seen in Figures 6 and 7, thus affecting the HV values. In Figure 11 the experimental law proposed by ÇADIRLI [22] and results obtained by KARAKÖSE and KESKIN [20] are presented, in these works the cooling rates applied were between 0.01 and 4 K/s and 1.7×10 6 to 3. …”

Section: Resultsmentioning

confidence: 95%

“…Figure This is verified in Fugure 9 the presence of primary silicon isolated particles dispersed in eutectic-matrix, which appear to be responsible for the high hardness noted in Al3wt.%Cu-5.5wt.%Si of this work. According to ÇADIRLI [22], characteristics of cooling rate play a vital role for a good combination of microstructure and mechanical properties. Furthermore, Figure 11 depicts the evolution of HV with the thermal parameters VL and TR (Figures 11a and 11b) for the alloy investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, ÇADIRLI [22] has been investigated the influence of cooling rate and composition on the microhardness (HV) and ultimate tensile strength (σ) of unidirectional solidified Al-Cu alloys during upward steady-state solidification. It has been observed that increasing copper content and cooling rate, microhardness and tensile strength increase, while strain decreases.…”

Section: Introductionmentioning

confidence: 99%

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Influence of upward and horizontal growth direction on microstructure and microhardness of an unsteady-state directionally solidified Al-Cu-Si alloy

et al. 2016

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In order to analyze the effect of the growth direction on dendrite arm spacing (1) and microhardness (HV) during horizontal directional solidification (HDS), experiments were carried out with the Al-3wt.%Cu-5.5wt.%Si alloy and the results compared with others from the literature elaborated for upward directional solidification (UDS). For this purpose, a water-cooled directional solidification experimental device was developed, and the alloy investigated was solidified under unsteady-state heat flow conditions. Thermal parameters such as growth rate (VL) and cooling rate (TR) were determined experimentally and correlations among VL, TR, 1 and HV has been performed. It is observed that experimental power laws characterize 1 with a function of VL and TR given by: 1=constant(VL) -1.1 and 1=constant(TR) -0.55 . The horizontal solidification direction has not affected the power growth law of 1 found for the upward solidification. However, higher values of 1 have been observed when the solidification is developed in the horizontal direction. The interrelation of HV as function of VL, TR and 1 has been represented by power and Hall-Petch laws. A comparison with the Al-3wt.%Cu alloy from literature was also performed and the results show the Si element affecting significativaly the HV values.

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Thermodynamics‐Guided High‐Throughput Discovery of Eutectic High‐Entropy Alloys for Rapid Solidification

Han,

Sun,

Xia

et al. 2024

Advanced Science

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Excellent castability, significantly refined microstructure, and good mechanical properties make eutectic high‐entropy alloys (EHEAs) a natural fit for rapid solidification processes, e.g., additive manufacturing. Previous investigations have focused on developing EHEAs through trial and error and mixing known binary eutectic materials. However, eutectic compositions obtained from near‐equilibrium conditions do not guarantee a fully eutectic microstructure under rapid solidifications. In this work, a thermodynamically guided high‐throughput framework is proposed to design EHEAs for rapid solidification. Empirical formulas derived from past experimental observations and thermodynamic computations are applied and considered phase growth kinetics under rapid solidification (skewed phase diagram). The designed alloy candidate, Co25.6Fe17.9Ni22.4Cr19.1Ta8.9Al6.1 (wt.%), contains nanostructured eutectic lamellar and shows a high Vickers hardness of 675 Hv. In addition to this specific composition, the alloy design toolbox enables the development of new EHEAs for rapid solidification without the limitation of previous knowledge.

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Effect of solidification parameters on mechanical properties of directionally solidified Al-Rich Al-Cu alloys

Cited by 65 publications

References 37 publications

Influences of Growth Velocity and Fe Content on Microstructure, Microhardness and Tensile Properties of Directionally Solidified Al-1.9Mn-xFe Ternary Alloys

Influences of Growth Velocity and Fe Content on Microstructure, Microhardness and Tensile Properties of Directionally Solidified Al-1.9Mn-xFe Ternary Alloys

Influence of upward and horizontal growth direction on microstructure and microhardness of an unsteady-state directionally solidified Al-Cu-Si alloy

Thermodynamics‐Guided High‐Throughput Discovery of Eutectic High‐Entropy Alloys for Rapid Solidification

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