Influence of Cooling Rate and Aging on the Lamellar Microstructure and Fractography of TC21 Titanium Alloy

Hui Shao; Yongqing Zhao; Peng Ge; Weidong Zeng

doi:10.1007/s13632-012-0055-3

Influence of Cooling Rate and Aging on the Lamellar Microstructure and Fractography of TC21 Titanium Alloy

Hui Shao, Yongqing Zhao, Peng Ge, Weidong Zeng

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

27 引用（Scopus）

摘要

A new titanium alloy (Ti-5. 97Al-2. 06Sn-2. 02Zr-2. 96Mo-1. 25Cr-2. 08Nb-xSi, wt.%) was cooled at different rates to produce a variety of microstructures. Phase and microstructure characterization were performed using LM, SEM, TEM, and XRD. The β phase transformed to the α″ phase upon water quenching. The transformation (β → β_metastable + α) took place when the cooling rate decreased to the air cooling and furnace cooling rates. After a subsequent aging treatment, both the α″ and the metastable β phase decomposed into α and β phases with different morphologies. The tensile and yield strength values depended on the final microstructures and were related to the fractal dimension of the fracture surfaces.

源语言	英语
页（从-至）	35-41
页数	7
期刊	Metallography, Microstructure, and Analysis
卷	2
期	1
DOI	https://doi.org/10.1007/s13632-012-0055-3
出版状态	已出版 - 2月 2013

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abstract = "A new titanium alloy (Ti-5. 97Al-2. 06Sn-2. 02Zr-2. 96Mo-1. 25Cr-2. 08Nb-xSi, wt.%) was cooled at different rates to produce a variety of microstructures. Phase and microstructure characterization were performed using LM, SEM, TEM, and XRD. The β phase transformed to the α″ phase upon water quenching. The transformation (β → βmetastable + α) took place when the cooling rate decreased to the air cooling and furnace cooling rates. After a subsequent aging treatment, both the α″ and the metastable β phase decomposed into α and β phases with different morphologies. The tensile and yield strength values depended on the final microstructures and were related to the fractal dimension of the fracture surfaces.",

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AU - Ge, Peng

AU - Zeng, Weidong

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N2 - A new titanium alloy (Ti-5. 97Al-2. 06Sn-2. 02Zr-2. 96Mo-1. 25Cr-2. 08Nb-xSi, wt.%) was cooled at different rates to produce a variety of microstructures. Phase and microstructure characterization were performed using LM, SEM, TEM, and XRD. The β phase transformed to the α″ phase upon water quenching. The transformation (β → βmetastable + α) took place when the cooling rate decreased to the air cooling and furnace cooling rates. After a subsequent aging treatment, both the α″ and the metastable β phase decomposed into α and β phases with different morphologies. The tensile and yield strength values depended on the final microstructures and were related to the fractal dimension of the fracture surfaces.

AB - A new titanium alloy (Ti-5. 97Al-2. 06Sn-2. 02Zr-2. 96Mo-1. 25Cr-2. 08Nb-xSi, wt.%) was cooled at different rates to produce a variety of microstructures. Phase and microstructure characterization were performed using LM, SEM, TEM, and XRD. The β phase transformed to the α″ phase upon water quenching. The transformation (β → βmetastable + α) took place when the cooling rate decreased to the air cooling and furnace cooling rates. After a subsequent aging treatment, both the α″ and the metastable β phase decomposed into α and β phases with different morphologies. The tensile and yield strength values depended on the final microstructures and were related to the fractal dimension of the fracture surfaces.

KW - Aging

KW - Cooling rate

KW - Fractal dimension

KW - Microstructure

KW - Phase

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Influence of Cooling Rate and Aging on the Lamellar Microstructure and Fractography of TC21 Titanium Alloy

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