Microstructure evolution and nano-hardness modulation of rapidly solidified Ti–Al–Nb alloy

In the present study, Sn70-X at.% -Bi15 at.% -Sb15 at.%- Inx at.%Â alloy ( x= 0, 2, 4, 6),Â were prepared by melt spinning technique. Optical microscopy, scanning electron microscopy combined with energy dispersive X-ray analysis (SEM-EDX), X-ray diffraction analysis (XRD), and Vickers microhardness (Hv); were used to characterize the phase transformation and the microstructure evolution. The results contribute to the understanding of the microstructure evolution in alloys of the type prepared by melt spinning technique. This work reports on a comparative study of the rapidly solidified, in order to compare the microhardness and microstructural analysis.Â

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Microstructure evolution of the rapidly solidified alloy powders and composite powders

Materials & Design ◽

10.1016/j.matdes.2019.108045 ◽

2019 ◽

Vol 182 ◽

pp. 108045 ◽

Cited By ~ 3

Author(s):

Q. Yang ◽

Y.T. Liu ◽

J. Liu ◽

L. Wang ◽

Z. Chen ◽

...

Keyword(s):

Microstructure Evolution ◽

Composite Powders ◽

Rapidly Solidified

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Microstructure evolution and properties of rapidly solidified Au-20Sn eutectic solder prepared by single-roll technology

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2018.12.073 ◽

2019 ◽

Vol 781 ◽

pp. 873-882 ◽

Cited By ~ 12

Author(s):

Shengfa Liu ◽

Dongxiao Zhang ◽

Jieran Xiong ◽

Chen Chen ◽

Tianjie Song ◽

...

Keyword(s):

Microstructure Evolution ◽

Eutectic Solder ◽

Rapidly Solidified

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Microstructure of Rapidly Solidified Ti-46Al-2Cr-2Nb-xY Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.29-30.103 ◽

2007 ◽

Vol 29-30 ◽

pp. 103-106

Author(s):

Yu Yong Chen ◽

Zhi Guang Liu ◽

L. Chai ◽

Fan Tao Kong ◽

Hywel A. Davies

Keyword(s):

Particle Size ◽

Rapid Solidification ◽

Microstructure Evolution ◽

Yttrium Addition ◽

The Matrix ◽

Cast Alloys ◽

Dendritic Arm Spacing ◽

Rapidly Solidified ◽

Bcc Phase ◽

Conventionally Cast

In this paper, a rapid solidification (RS) method was employed to produce yttrium-containing TiAl based alloy ribbons. The microstructure evolution was investigated in terms of yttrium addition and RS parameters. For comparison, the conventionally cast counterpart alloys were studied as well. It was found that the microstructure of as cast alloys is sensitive to the Y content. The alloys with addition of 0 to 1.0at.% Y were of lamellar microstructures, but the alloy samples with 1.5 and 2.0at.% Y additioin were of strip-like microstructure. The yttrium-free alloy exhibited full γ phase, while the Y-bearing alloys contain γ phase, a small amount of α2, and yttrium containing phases. With increasing Y content, the secondary dendritic arm spacing (SDAS) gradually reduced. In the case of the rapidly solidified alloys, the microstructure was refined evidently when compared with the as cast counterparts. The fine Y-rich precipitates were homogeneously distributed in the matrix with a particle size of several tens of nanometers. A bcc phase (a=0.314 nm) was found in the alloys containing more than 1.5at.% Y, which was attributed to the extension of the solubility of Y in the matrix by rapid solidification.

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