Research of microstructure and mechanical behavior on duplex (α + β) Ti-4.8Al-2.5Mo-1.4V alloy

Pei Wen Peng; Keng Liang Ou; Chih Yeh Chao; Yung Ning Pan; Chau Hsiang Wang

doi:10.1016/j.jallcom.2009.10.133

Research of microstructure and mechanical behavior on duplex (α + β) Ti-4.8Al-2.5Mo-1.4V alloy

Pei Wen Peng, Keng Liang Ou, Chih Yeh Chao, Yung Ning Pan, Chau Hsiang Wang

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

22 Citations (Scopus)

Abstract

The microstructure and mechanical behavior of the duplex Ti-4.8Al-2.5Mo-1.4V (Ti14) alloy were investigated by means of optical microscopy, electron microscopy, experimental model analysis, and hardness and tensile testing. During heat-treatment at between 600 and 1000 °C, the phase transformation sequence was found to be (α + β) → (α + β + α′) → (α′ + α″ + residual β). The (α′ + α″ + residual β) structure exhibited the maximum yield strength (σ_y = 920 MPa), hardness (HR_C 36), and damping coefficient (188.3 × 10^-4). However, the (α + β) structure achieved the greatest elongation (∼15%). It is believed that the lath-like α′ martensite not only increases the tensile strength, but also enhances the hardness of the Ti14 alloy. Moreover, it also plays a crucial role in increasing the damping capacity of the Ti14 alloy.

Original language	English
Pages (from-to)	661-666
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	490
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.10.133
Publication status	Published - Feb 4 2010

Keywords

Damping coefficient
Mechanical properties
Microstructure
Titanium alloy
Transmission electron microscopey

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
Materials Chemistry
Metals and Alloys

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10.1016/j.jallcom.2009.10.133

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title = "Research of microstructure and mechanical behavior on duplex (α + β) Ti-4.8Al-2.5Mo-1.4V alloy",

abstract = "The microstructure and mechanical behavior of the duplex Ti-4.8Al-2.5Mo-1.4V (Ti14) alloy were investigated by means of optical microscopy, electron microscopy, experimental model analysis, and hardness and tensile testing. During heat-treatment at between 600 and 1000 °C, the phase transformation sequence was found to be (α + β) → (α + β + α′) → (α′ + α″ + residual β). The (α′ + α″ + residual β) structure exhibited the maximum yield strength (σy = 920 MPa), hardness (HRC 36), and damping coefficient (188.3 × 10-4). However, the (α + β) structure achieved the greatest elongation (∼15%). It is believed that the lath-like α′ martensite not only increases the tensile strength, but also enhances the hardness of the Ti14 alloy. Moreover, it also plays a crucial role in increasing the damping capacity of the Ti14 alloy.",

keywords = "Damping coefficient, Mechanical properties, Microstructure, Titanium alloy, Transmission electron microscopey",

author = "Peng, {Pei Wen} and Ou, {Keng Liang} and Chao, {Chih Yeh} and Pan, {Yung Ning} and Wang, {Chau Hsiang}",

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doi = "10.1016/j.jallcom.2009.10.133",

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AU - Peng, Pei Wen

AU - Ou, Keng Liang

AU - Chao, Chih Yeh

AU - Pan, Yung Ning

AU - Wang, Chau Hsiang

PY - 2010/2/4

Y1 - 2010/2/4

N2 - The microstructure and mechanical behavior of the duplex Ti-4.8Al-2.5Mo-1.4V (Ti14) alloy were investigated by means of optical microscopy, electron microscopy, experimental model analysis, and hardness and tensile testing. During heat-treatment at between 600 and 1000 °C, the phase transformation sequence was found to be (α + β) → (α + β + α′) → (α′ + α″ + residual β). The (α′ + α″ + residual β) structure exhibited the maximum yield strength (σy = 920 MPa), hardness (HRC 36), and damping coefficient (188.3 × 10-4). However, the (α + β) structure achieved the greatest elongation (∼15%). It is believed that the lath-like α′ martensite not only increases the tensile strength, but also enhances the hardness of the Ti14 alloy. Moreover, it also plays a crucial role in increasing the damping capacity of the Ti14 alloy.

AB - The microstructure and mechanical behavior of the duplex Ti-4.8Al-2.5Mo-1.4V (Ti14) alloy were investigated by means of optical microscopy, electron microscopy, experimental model analysis, and hardness and tensile testing. During heat-treatment at between 600 and 1000 °C, the phase transformation sequence was found to be (α + β) → (α + β + α′) → (α′ + α″ + residual β). The (α′ + α″ + residual β) structure exhibited the maximum yield strength (σy = 920 MPa), hardness (HRC 36), and damping coefficient (188.3 × 10-4). However, the (α + β) structure achieved the greatest elongation (∼15%). It is believed that the lath-like α′ martensite not only increases the tensile strength, but also enhances the hardness of the Ti14 alloy. Moreover, it also plays a crucial role in increasing the damping capacity of the Ti14 alloy.

KW - Damping coefficient

KW - Mechanical properties

KW - Microstructure

KW - Titanium alloy

KW - Transmission electron microscopey

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Research of microstructure and mechanical behavior on duplex (α + β) Ti-4.8Al-2.5Mo-1.4V alloy

Abstract

Keywords

ASJC Scopus subject areas

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