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

School of Materials Sience and Engineering

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

27 Scopus citations

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 → 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.

Original language	English
Pages (from-to)	35-41
Number of pages	7
Journal	Metallography, Microstructure, and Analysis
Volume	2
Issue number	1
DOIs	https://doi.org/10.1007/s13632-012-0055-3
State	Published - Feb 2013

Keywords

Aging
Cooling rate
Fractal dimension
Microstructure
Phase

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10.1007/s13632-012-0055-3

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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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Keywords

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