AustralieFrV1, Main, Exploration, bibRecord, 00A549

Modeling the precipitation processes and strengthening mechanisms in a Mg-Al-(Zn) AZ91 alloy

Identifieur interne : 00A549 ( Main/Exploration ); précédent : 00A548; suivant : 00A550

Modeling the precipitation processes and strengthening mechanisms in a Mg-Al-(Zn) AZ91 alloy

Auteurs : C. R. Hutchinson [Australie] ; J. F. Nie [Australie] ; S. Gorsse [France]

Source :

Metallurgical and materials transactions. A, Physical metallurgy and materials science [ 1073-5623 ] ; 2005.

RBID : Pascal:06-0229016

Descripteurs français

Pascal (Inist)
- Modélisation, Durcissement précipitation, Microstructure, Précipitation, Mécanisme, Alliage base magnésium.

English descriptors

KwdEn :
- Magnesium base alloys, Mechanism, Microstructure, Modeling, Precipitation, Precipitation hardening.

Abstract

A model is developed that couples a description of the continuous precipitation of β-Mg₁₇Al₁₂ laths at elevated temperatures to a summation of the different contributions to the room-temperature 0.2 pct proof strength in the commercial alloy AZ91 (Mg-9Al-1Zn (wt pct)). The central assumptions are the diffusion-controlled formation of shear resistant β-Mg₁₇Al₁₂ laths on the basal planes of the hcp matrix and basal slip as the dominant room-temperature deformation mode. The calculations show quantitative agreement with the evolution of both the reported precipitation kinetics and the strengthening response as a function of aging time at 200 °C. The magnitudes of the different contributions to the hardening are discussed and strategies for enhancing this response are suggested.

Affiliations:

Australie, France

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 004435
to stream PascalFrancis, to step Curation: 001C60
to stream PascalFrancis, to step Checkpoint: 004506
to stream Main, to step Merge: 00B156
to stream Main, to step Curation: 00A549

Le document en format XML

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<front><div type="abstract" xml:lang="en">A model is developed that couples a description of the continuous precipitation of β-Mg<sub>17</sub>
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Al<sub>12</sub>
 laths on the basal planes of the hcp matrix and basal slip as the dominant room-temperature deformation mode. The calculations show quantitative agreement with the evolution of both the reported precipitation kinetics and the strengthening response as a function of aging time at 200 °C. The magnitudes of the different contributions to the hardening are discussed and strategies for enhancing this response are suggested.</div>
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Modeling the precipitation processes and strengthening mechanisms in a Mg-Al-(Zn) AZ91 alloy

Modeling the precipitation processes and strengthening mechanisms in a Mg-Al-(Zn) AZ91 alloy

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri