Dependency of microhardness on solidification processing parameters and microstructure characteristics in the directionally solidified Ti–46Al–0.5W–0.5Si alloy

Fan, Jiangkun; Li, Xinzhong; Su, Yanqing; Guo, Jingjie; Fu, Hengzhi

doi:10.1016/j.jallcom.2010.05.095

Cited by 50 publications

(29 citation statements)

References 29 publications

(44 reference statements)

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“…The average microhardness values measured on the longitudinal and transverse sections of the samples are given in Table 1 52 , Liu et al 53 , Frear et al 54 and Ghosh 55 , respectively. The exponent value (0.13-0.14) of the V (for lamellar structure) is in good agreement with the value of 0.14, 0.11, 0.15, values obtained by Zhang et al 7 for Ni-25at.%Si alloy, by Hu et al 56 for Sn-1.0 wt.% Cu, by Fan et al 57 for Ti-46Al-0.5W-0.5Si alloy (at.%), respectively. Decrease in lamellar spacing due to the increasing solidification rate, increased the microhardness.…”

Section: Effect Of Solidification Rate On Microhardnesssupporting

confidence: 91%

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

2018

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Sn-36Bi-22Cu (wt.%) ternary eutectic alloy was prepared using vacuum melting furnace and casting furnace. The samples were directionally solidified upwards solidification rate varying from 8.3 to 166 µm/s and at a constant temperature gradient (4.2 K/mm) in a Bridgman-type directional solidification furnace. The composition analysis of the phases and the intermetallics (Cu 3 Sn and Cu 6 Sn 5 ) were determined from EDX and XRD analysis respectively. The variation of the lamellar spacing (Bi-rich phase) and the Cu 3 Sn phase spacing with the solidification rate were investigated. The dependence of microhardness, ultimate compressive strength and compressive yield strength on solidification rate were determined. The spacing and microhardness were measured from both longitudinal and transverse sections of the samples. The dependence of microhardness on the lamellar spacing and the Cu 3 Sn phase spacing were also determined. The relationships between phase spacings, solidification rate and mechanical properties were determined from linear regression analysis.

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Section: Effect Of Solidification Rate On Microhardnesssupporting

confidence: 91%

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

2018

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“…The exponent values of V (0.04-0.06) obtained in this study are in good agreement with the values of 0,05, 0.08, 0.09, 0.04 and 0.07 reported by Çadırlı et al 24 for Al-Cu-Co eutectic, Aker et al 22 for Al-Sb eutectic, Kaya et al 33 for Al-Si eutectic, Guo et al 34 for NiAl-28Cr-5Mo-1Hf (at%), Lapin and Marecek 35 for Ni-21.9Al-8.1Cr-4.2Ta-0.9Mo-0.3Zr (at%), respectively. But, this exponent value is lower than the values of 0.14, 0.15 and 0.16 reported by Lapin et al 36 for Ti-46Al-2W-0.5Si (at%), Fan et al 37 for Ti-46Al-0.5W-0.5Si (at%) and Fan et al 38 for Ti-49 at% Al alloy, respectively. Figure 10b shows the values of σ u as a function of C o .…”

Section: Effect Of Growth Velocity and Fe Content On The Tensile Propcontrasting

confidence: 58%

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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“…The exponent value of V (0.07) for HV is lower than the values of 0.11, 0.14, and 0.15 reported by Hu et al [61] for Sn-1.0 wt pct Cu, by Lapin et al [62] for Ti-46Al-2W-0.5Si (at. pct) alloy, and by Fan et al [63] for Ti-46Al-0.5W-0.5Si alloy (at pct), respectively. The average exponent value of k 1 (0.29) obtained in this study as a function of the HV is slightly higher than the values of 0.22, 0.24, 0.21, 0.20, 0.25, and 0.28 reported by Bo¨yu¨k et al [64] for Al-17.6Cu-42.2Ag (wt pct) alloy, by Engin et al [65] for Zn-5 wt pct Al alloy, by Hu et al [61] for Sn-1.0 wt pct Cu alloy, by Hu et al [66] for Sn-40.5Pb-2.6Sb (wt pct) alloy, by Kaya et al [60] for Al-0.1 wt pct Ti alloy, and by Kaya et al [67] for Al-3 wt pct Si alloy, respectively.…”

Section: The Effect Of Dendritic Spacing and Growth Rate On Microhmentioning

confidence: 90%

Effect of Growth Rate on the Microstructure and Microhardness in a Directionally Solidified Al-Zn-Mg Alloy

Acer

Çadırlı

Erol

et al. 2016

Metall Mater Trans A

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The Al-5.5Zn-2.5Mg (wt pct) ternary alloy was prepared using a vacuum melting furnace and a casting furnace. Five samples were directionally solidified upwards at a constant temperature gradient (G = 5.5 K/mm) under different growth rates (V = 8.3-165 lm/s) in a Bridgman-type directional solidification furnace. The primary dendrite arm spacing, k 1 , secondary dendrite arm spacing, k 2 , and microhardness, HV, of the samples were measured. The effects of V on k 1 , k 2 and HV properties of the Al-Zn-Mg alloy were studied by microstructure analysis and mechanical characterization. Microstructure characterization of the alloys was carried out using optical microscopy, scanning electron microscopy, wavelength-dispersive X-ray fluorescence spectrometry, and energy dispersive X-ray spectroscopy. From the experimental results, it is found that the k 1 , k 2 values decrease, but HV values increase with the increase in V, and HV values decrease with the increase in k 1 and k 2 . Dependencies of dendritic spacing and microhardness on the growth rate were determined using linear regression analysis. The growth rate, microstructure, and Hall-Petch-type relationships obtained in this work have been compared with the results of previous studies.

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Dependency of microhardness on solidification processing parameters and microstructure characteristics in the directionally solidified Ti–46Al–0.5W–0.5Si alloy

Cited by 50 publications

References 29 publications

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

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

Effect of Growth Rate on the Microstructure and Microhardness in a Directionally Solidified Al-Zn-Mg Alloy

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