Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis

A metastable beta TMZF alloy was tested by isothermal compression under different conditions of deformation temperature (923 to 1173 K), strain rate (0.172, 1.72, and 17.2 s<sup>−1</sup>), and a constant strain of 0.8. Stress–strain curves, constitutive constants calculations, and micros...

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Autores principales:	Ana Paula de Bribean Guerra, Alberto Moreira Jorge, Virginie Roche, Claudemiro Bolfarini
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	TMZF beta metastable dynamic recovering spinodal decomposition constitutive analysis mechanical twinning Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/3eaf7ca259a34ab3aa4c8012063fa010
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spelling	oai:doaj.org-article:3eaf7ca259a34ab3aa4c8012063fa0102021-11-25T18:21:48ZHot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis10.3390/met111117692075-4701https://doaj.org/article/3eaf7ca259a34ab3aa4c8012063fa0102021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1769https://doaj.org/toc/2075-4701A metastable beta TMZF alloy was tested by isothermal compression under different conditions of deformation temperature (923 to 1173 K), strain rate (0.172, 1.72, and 17.2 s<sup>−1</sup>), and a constant strain of 0.8. Stress–strain curves, constitutive constants calculations, and microstructural analysis were performed to understand the alloy’s hot working behavior in regards to the softening and hardening mechanisms operating during deformation. The primary softening mechanism was dynamic recovery, promoting dynamic recrystallization delay during deformation at higher temperatures and low strain rates. Mechanical twinning was an essential deformation mechanism of this alloy, being observed on a nanometric scale. Spinodal decomposition evidence was found to occur during hot deformation. Different models of phenomenological constitutive equations were tested to verify the effectiveness of flow stress prediction. The stress exponent <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>n</mi></semantics></math></inline-formula>, derived from the strain-compensated Arrhenius-type constitutive model, presented values that point to the occurrence of internal stress at the beginning of the deformation, related to complex interactions of dislocations and dispersed phases.Ana Paula de Bribean GuerraAlberto Moreira JorgeVirginie RocheClaudemiro BolfariniMDPI AGarticleTMZFbeta metastabledynamic recoveringspinodal decompositionconstitutive analysismechanical twinningMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1769, p 1769 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	TMZF beta metastable dynamic recovering spinodal decomposition constitutive analysis mechanical twinning Mining engineering. Metallurgy TN1-997
spellingShingle	TMZF beta metastable dynamic recovering spinodal decomposition constitutive analysis mechanical twinning Mining engineering. Metallurgy TN1-997 Ana Paula de Bribean Guerra Alberto Moreira Jorge Virginie Roche Claudemiro Bolfarini Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
description	A metastable beta TMZF alloy was tested by isothermal compression under different conditions of deformation temperature (923 to 1173 K), strain rate (0.172, 1.72, and 17.2 s<sup>−1</sup>), and a constant strain of 0.8. Stress–strain curves, constitutive constants calculations, and microstructural analysis were performed to understand the alloy’s hot working behavior in regards to the softening and hardening mechanisms operating during deformation. The primary softening mechanism was dynamic recovery, promoting dynamic recrystallization delay during deformation at higher temperatures and low strain rates. Mechanical twinning was an essential deformation mechanism of this alloy, being observed on a nanometric scale. Spinodal decomposition evidence was found to occur during hot deformation. Different models of phenomenological constitutive equations were tested to verify the effectiveness of flow stress prediction. The stress exponent <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>n</mi></semantics></math></inline-formula>, derived from the strain-compensated Arrhenius-type constitutive model, presented values that point to the occurrence of internal stress at the beginning of the deformation, related to complex interactions of dislocations and dispersed phases.
format	article
author	Ana Paula de Bribean Guerra Alberto Moreira Jorge Virginie Roche Claudemiro Bolfarini
author_facet	Ana Paula de Bribean Guerra Alberto Moreira Jorge Virginie Roche Claudemiro Bolfarini
author_sort	Ana Paula de Bribean Guerra
title	Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
title_short	Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
title_full	Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
title_fullStr	Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
title_full_unstemmed	Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis
title_sort	hot deformation behavior of a beta metastable tmzf alloy: microstructural and constitutive phenomenological analysis
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3eaf7ca259a34ab3aa4c8012063fa010
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Hot Deformation Behavior of a Beta Metastable TMZF Alloy: Microstructural and Constitutive Phenomenological Analysis

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