Hot deformation characteristics and microstructural evolution of Ti-900 alloy

Dipayan Chakraborty; Gyan Shankar; Akanksha Prajapati; B. R. Chandra Obul Reddy; Ajay Kumar

doi:10.1016/j.matlet.2023.135546

Hot deformation characteristics and microstructural evolution of Ti-900 alloy

Dipayan Chakraborty, Gyan Shankar, Akanksha Prajapati, B. R. Chandra Obul Reddy, Ajay Kumar

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

1 Scopus citations

Abstract

Hot deformation behaviour of Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy has been analyzed by conducting an isothermal hot compression test at 850 °C to 1050 °C temperatures and strain rates between 0.001 s⁻¹ to 10 s⁻¹. The effect of strain rates and deformation temperature on flow stress is investigated. The processing maps are constructed, and constitutive equations are studied to understand the formability of the novel titanium alloy in the different temperatures and strain rates regimes. Results suggest that temperatures and strain rates between 880 °C to 950 °C and 0.001 s⁻¹ to 0.01 s⁻¹ are the optimal processing window for this alloy. The kinetic rate equation indicates that the apparent activation energy for deformation is 531 kJ/mol in the α + β region. Post deformation microstructure formation is also studied.

Original language	English
Article number	135546
Journal	Materials Letters
Volume	355
DOIs	https://doi.org/10.1016/j.matlet.2023.135546
State	Published - Jan 15 2024
Externally published	Yes

Keywords

Hot deformation
Metals and alloys
Microstructure
Processing maps

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10.1016/j.matlet.2023.135546

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title = "Hot deformation characteristics and microstructural evolution of Ti-900 alloy",

abstract = "Hot deformation behaviour of Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy has been analyzed by conducting an isothermal hot compression test at 850 °C to 1050 °C temperatures and strain rates between 0.001 s−1 to 10 s−1. The effect of strain rates and deformation temperature on flow stress is investigated. The processing maps are constructed, and constitutive equations are studied to understand the formability of the novel titanium alloy in the different temperatures and strain rates regimes. Results suggest that temperatures and strain rates between 880 °C to 950 °C and 0.001 s−1 to 0.01 s−1 are the optimal processing window for this alloy. The kinetic rate equation indicates that the apparent activation energy for deformation is 531 kJ/mol in the α + β region. Post deformation microstructure formation is also studied.",

keywords = "Hot deformation, Metals and alloys, Microstructure, Processing maps",

author = "Dipayan Chakraborty and Gyan Shankar and Akanksha Prajapati and {Chandra Obul Reddy}, {B. R.} and Ajay Kumar",

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T1 - Hot deformation characteristics and microstructural evolution of Ti-900 alloy

AU - Chakraborty, Dipayan

AU - Shankar, Gyan

AU - Prajapati, Akanksha

AU - Chandra Obul Reddy, B. R.

AU - Kumar, Ajay

PY - 2024/1/15

Y1 - 2024/1/15

N2 - Hot deformation behaviour of Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy has been analyzed by conducting an isothermal hot compression test at 850 °C to 1050 °C temperatures and strain rates between 0.001 s−1 to 10 s−1. The effect of strain rates and deformation temperature on flow stress is investigated. The processing maps are constructed, and constitutive equations are studied to understand the formability of the novel titanium alloy in the different temperatures and strain rates regimes. Results suggest that temperatures and strain rates between 880 °C to 950 °C and 0.001 s−1 to 0.01 s−1 are the optimal processing window for this alloy. The kinetic rate equation indicates that the apparent activation energy for deformation is 531 kJ/mol in the α + β region. Post deformation microstructure formation is also studied.

AB - Hot deformation behaviour of Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy has been analyzed by conducting an isothermal hot compression test at 850 °C to 1050 °C temperatures and strain rates between 0.001 s−1 to 10 s−1. The effect of strain rates and deformation temperature on flow stress is investigated. The processing maps are constructed, and constitutive equations are studied to understand the formability of the novel titanium alloy in the different temperatures and strain rates regimes. Results suggest that temperatures and strain rates between 880 °C to 950 °C and 0.001 s−1 to 0.01 s−1 are the optimal processing window for this alloy. The kinetic rate equation indicates that the apparent activation energy for deformation is 531 kJ/mol in the α + β region. Post deformation microstructure formation is also studied.

KW - Hot deformation

KW - Metals and alloys

KW - Microstructure

KW - Processing maps

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DO - 10.1016/j.matlet.2023.135546

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VL - 355

JO - Materials Letters

JF - Materials Letters

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ER -

Hot deformation characteristics and microstructural evolution of Ti-900 alloy

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Keywords

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