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Metallurgical and Materials Transactions A
Erschienen in: Metallurgical and Materials Transactions A 10/2011

01.10.2011

A Transient Thermal Model for Friction Stir Weld. Part I: The Model

verfasst von: X. X. Zhang, B. L. Xiao, Z. Y. Ma

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 10/2011

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Abstract

Current analytical thermal models for friction stir welding (FSW) are mainly focused on the steady-state condition. To better understand the FSW process, we propose a transient thermal model for FSW, which considers all the periods of FSW. A temperature-dependent apparent friction coefficient solved by the inverse solution method (ISM) is used to estimate the heat generation rate. The physical reasonableness, self-consistency, and relative achievements of this model are discussed, and the relationships between the heat generation, friction coefficient, and temperature are established. The negative feedback mechanism and positive feedback mechanism are proposed for the first time and found to be the dominant factors in controlling the friction coefficient, heat generation, and in turn the temperature. Furthermore, the negative feedback mechanism is found to be the controller of the steady-state level of FSW. The validity of the proposed model is proved by applying it to FSW of the 6061-T651 and 6063-T5 aluminum alloys.
Vorheriger Artikel Effect of Annealing on Thermal Stability, Precipitate Evolution, and Mechanical Properties of Cryorolled Al 7075 Alloy
Nächster Artikel A Transient Thermal Model for Friction Stir Weld. Part II: Effects of Weld Conditions

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Metadaten
Titel
A Transient Thermal Model for Friction Stir Weld. Part I: The Model
verfasst von
X. X. Zhang
B. L. Xiao
Z. Y. Ma
Publikationsdatum
01.10.2011
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 10/2011
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-011-0729-5

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