The microstructure parameters and microhardness of directionally solidified Ti–43Al–3Si alloy

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

doi:10.1016/j.jallcom.2010.07.122

Cited by 53 publications

(36 citation statements)

References 30 publications

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“…As the value of Fe content (C o ) was increased, the rod spacings (λ) . The exponent values of C o for λ were found to be -0.43, -0.35, -0.17 and -0.37 for each growth velocities, respectively (see Table 1 19 for Al-Cu-Ag eutectic, Gündüz et al 20 for Al-Si eutectic, Steinbach and Ratke 21 for Al-Si-Mg, Aker et al 22 for Al-Sb eutectic, Fan et al 23 for Al-Si-Ti and Çadırlı et al 24 for Al-Cu-Co eutectic, respectively. But, exponent values of V in this work are slightly lower than the value of 0.50 predicted on the basis of the Jackson-Hunt 25 binary eutectic theory.…”

Section: Effect Of Growth Velocity and Composition (Fe Content) On Thmentioning

confidence: 97%

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: Effect Of Growth Velocity and Composition (Fe Content) On Thmentioning

confidence: 97%

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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“…The k L value decreased from 2.60 to 0.56 lm, and the k T value decreased from 2.50 to 0.50 lm with the increase in the growth rate from 8. [8,19] for Ti-43Al-3Si (at.%) and Ti-49at.%Al alloys, by Shang et al [20] for Ni-31Al-32Cr-6Mo (at.%) hypereutectic alloy, by Yılmaz and Elliott [21] for Al-(14-17)wt%Si hypereutectic alloys, by Li et al [22] for Nb-17Si-10Mo-3Al (at.) eutectic alloy, by Witusiewicz et al [23] for In-20.8Bi-17.7Sn (at.%) alloy, and by Lapin et al [24] for Ti-46Al-2 W-0.5Si (at.%) alloy; respectively.…”

Section: The Effect Of the Solidification Parameters On Lamellar Spacingmentioning

confidence: 99%

“…The change in the lamellar spacing depends on the different solidification parameters (temperature gradient, growth rate, and cooling rate) plays a vital role in the mechanical properties of the materials. Many studies performed on the improvement of the mechanical properties by finer lamellar structures are reported in the literature [1][2][3][4][5][6][7][8]. Recently, some studies have concentrated on the ternary and multicomponent alloy systems [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Directionally Solidified Sn–Pb–Sb Ternary Eutectic Alloy

Çadırlı

Şahin

Turgut

2015

Metallogr. Microstruct. Anal.

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A Sn-40.5wt%Pb-2.6wt%Sb ternary eutectic alloy was prepared using a vacuum melting furnace and a casting furnace. The samples were directionally solidified at a constant growth rate (V = 16.5 lm/s) under different temperature gradients (G = 1.05-3.88 K/mm) and at a constant temperature gradient (G = 3.88 K/mm) under different growth rates (V = 8.3-498 lm/s). The effects of G and V on lamellar spacing (k), microhardness (HV), and ultimate tensile strength (r) were determined. The lamellar spacing and microhardness were measured from both longitudinal and transverse sections of the sample. The relationships between solidification parameters (G, V), microstructure parameters (k L , k T ), and mechanical properties (HV, r) were determined from linear regression analysis. It was found that the microhardness and tensile strength increase with increasing G and V as well as with decreasing k.

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“…In this study, withdrawal rate directly affected the cooling rate and transformation time. Therefore, the higher the withdrawal rate, the shorter the necessary transformation time from β to α, and the larger the volume fractions of residual β phases (B2 phase) [15] . Similarly, the decomposition of the high-temperature α phase to lamellar structure also depends strongly on the withdrawal rate.…”

Section: Microstructurementioning

confidence: 99%

Dependency of microstructure and microhardness on withdrawal rate of Ti-43Al-2Cr-2Nb alloy prepared by electromagnetic cold crucible directional solidification

et al. 2016

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The microstructure parameters and microhardness of directionally solidified Ti–43Al–3Si alloy

Cited by 53 publications

References 30 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

Characterization of a Directionally Solidified Sn–Pb–Sb Ternary Eutectic Alloy

Dependency of microstructure and microhardness on withdrawal rate of Ti-43Al-2Cr-2Nb alloy prepared by electromagnetic cold crucible directional solidification

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