Primary phase growth and microstructure evolution of rapidly solidifying ternary Ti-12Al-8V alloy

S. L. Wei; L. J. Huang; J. Chang; W. Zhai; S. J. Yang; L. Geng

doi:10.1016/j.matlet.2016.04.043

Primary phase growth and microstructure evolution of rapidly solidifying ternary Ti-12Al-8V alloy

S. L. Wei, L. J. Huang, J. Chang, W. Zhai, S. J. Yang, L. Geng

School of Physical Science and Technology

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Liquid Ti-12Al-8V alloy was rapidly solidified by electromagnetic levitation and drop tube techniques. The levitation processing avoided the violent heterogeneous nucleation of primary β phase and led to an actual maximum undercooling of 212 K (0.11T_L). The primary β dendrites exhibited a high growth velocity up to 14.9 m/s but subsequently transformed into basket weave structures. Drop tube experiments indicated that the final microstructure morphology was determined by the coupled influences of undercooling extent and cooling rate. If the cooling rate exceeded 3.31×10³ K/s, the primary β phase was retained metastably to ambient temperature.

Original language	English
Pages (from-to)	291-295
Number of pages	5
Journal	Materials Letters
Volume	175
DOIs	https://doi.org/10.1016/j.matlet.2016.04.043
State	Published - 15 Jul 2016

Keywords

Crystal growth
Microstructure
Solidification
Thermal analysis
Titanium alloy

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10.1016/j.matlet.2016.04.043

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title = "Primary phase growth and microstructure evolution of rapidly solidifying ternary Ti-12Al-8V alloy",

abstract = "Liquid Ti-12Al-8V alloy was rapidly solidified by electromagnetic levitation and drop tube techniques. The levitation processing avoided the violent heterogeneous nucleation of primary β phase and led to an actual maximum undercooling of 212 K (0.11TL). The primary β dendrites exhibited a high growth velocity up to 14.9 m/s but subsequently transformed into basket weave structures. Drop tube experiments indicated that the final microstructure morphology was determined by the coupled influences of undercooling extent and cooling rate. If the cooling rate exceeded 3.31×103 K/s, the primary β phase was retained metastably to ambient temperature.",

keywords = "Crystal growth, Microstructure, Solidification, Thermal analysis, Titanium alloy",

author = "Wei, {S. L.} and Huang, {L. J.} and J. Chang and W. Zhai and Yang, {S. J.} and L. Geng",

year = "2016",

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doi = "10.1016/j.matlet.2016.04.043",

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T1 - Primary phase growth and microstructure evolution of rapidly solidifying ternary Ti-12Al-8V alloy

AU - Wei, S. L.

AU - Huang, L. J.

AU - Chang, J.

AU - Zhai, W.

AU - Yang, S. J.

AU - Geng, L.

PY - 2016/7/15

Y1 - 2016/7/15

N2 - Liquid Ti-12Al-8V alloy was rapidly solidified by electromagnetic levitation and drop tube techniques. The levitation processing avoided the violent heterogeneous nucleation of primary β phase and led to an actual maximum undercooling of 212 K (0.11TL). The primary β dendrites exhibited a high growth velocity up to 14.9 m/s but subsequently transformed into basket weave structures. Drop tube experiments indicated that the final microstructure morphology was determined by the coupled influences of undercooling extent and cooling rate. If the cooling rate exceeded 3.31×103 K/s, the primary β phase was retained metastably to ambient temperature.

AB - Liquid Ti-12Al-8V alloy was rapidly solidified by electromagnetic levitation and drop tube techniques. The levitation processing avoided the violent heterogeneous nucleation of primary β phase and led to an actual maximum undercooling of 212 K (0.11TL). The primary β dendrites exhibited a high growth velocity up to 14.9 m/s but subsequently transformed into basket weave structures. Drop tube experiments indicated that the final microstructure morphology was determined by the coupled influences of undercooling extent and cooling rate. If the cooling rate exceeded 3.31×103 K/s, the primary β phase was retained metastably to ambient temperature.

KW - Crystal growth

KW - Microstructure

KW - Solidification

KW - Thermal analysis

KW - Titanium alloy

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DO - 10.1016/j.matlet.2016.04.043

M3 - 文章

AN - SCOPUS:84962860343

SN - 0167-577X

VL - 175

SP - 291

EP - 295

JO - Materials Letters

JF - Materials Letters

ER -

Primary phase growth and microstructure evolution of rapidly solidifying ternary Ti-12Al-8V alloy

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Keywords

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