Journal ArticleDOI
Three-dimensional modeling of the friction stir-welding process
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TLDR
In this article, an attempt to model the stir-welding process using three-dimensional visco-plastic modeling was made to determine the effect of tool speeds on plate temperatures and validate the model predictions with available measurements.Abstract:
This paper presents an attempt to model the stir-welding process using three-dimensional visco-plastic modeling. The scope of the project is focused on butt joints for aluminum thick plates. Parametric studies have been conducted to determine the effect of tool speeds on plate temperatures and to validate the model predictions with available measurements. In addition, forces acting on the tool have been computed for various welding and rotational speeds. It is found that pin forces increase with increasing welding speeds, but the opposite effect is observed for increasing rotational speeds. Numerical models such as the one presented here will be useful in designing welding tools which will yield desired thermal gradients and avoid tool breakage.read more
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Journal ArticleDOI
Recent advances in friction-stir welding : Process, weldment structure and properties
TL;DR: In this article, the authors deal with the fundamental understanding of the process and its metallurgical consequences, focusing on heat generation, heat transfer and plastic flow during welding, elements of tool design, understanding defect formation and the structure and properties of the welded materials.
Journal ArticleDOI
Three-dimensional heat and material flow during friction stir welding of mild steel
TL;DR: In this article, three-dimensional viscoplastic flow and heat transfer during friction stir welding of mild steel was investigated both experimentally and theoretically, and the equations of conservation of mass, momentum and energy were solved in three dimensions using spatially variable thermo-physical properties and a methodology adapted from well established previous work in fusion welding.
Journal ArticleDOI
A review of numerical analysis of friction stir welding
TL;DR: In this article, the authors review the latest developments in the numerical analysis of friction stir welding processes, microstructures of friction-stir welded joints and the properties of friction spat welded structures.
Journal ArticleDOI
A local model for the thermomechanical conditions in friction stir welding
TL;DR: In this paper, the Coulomb's Law of friction was used to model the contact forces at the tool/matrix interface and the material flow at the interface was modeled as boundary conditions.
Journal ArticleDOI
Joining of aluminum alloy to steel by friction stir welding
TL;DR: In this article, the authors tried to butt-weld an aluminum alloy plate to a mild steel plate by friction stir welding, and investigated the effects of a pin rotation speed, the position for the pin axis to be inserted on the tensile strength and the microstructure of the joint.
References
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Book
The finite element method
TL;DR: In this article, the methodes are numeriques and the fonction de forme reference record created on 2005-11-18, modified on 2016-08-08.
Journal ArticleDOI
Microstructural aspects of the friction-stir welding of 6061-T6 aluminum
Journal Article
Friction stir process welds aluminium alloys : The process produces low-distortion, high-quality, low-cost welds on aluminium
C. J Dawes,W. M Thomas +1 more
Journal ArticleDOI
A TEM study of precipitation and related microstructures in friction-stir-welded 6061 aluminium
TL;DR: In this article, a hard steel head pin rotating at 400 r.p.m. was advanced into a solid 6061-aluminium plate at a traverse velocity of approximately 2 mm s−1 to produce a solid-phase weld in its trailing side.
Journal ArticleDOI
Microstructural issues in a friction-stir-welded aluminum alloy
Olga Valerio Flores,C. Kennedy,Lawrence E Murr,David Brown,S. Pappu,Brook M Nowak,John C. McClure +6 more
TL;DR: In this article, a microdendritic (second-phase), equiaxed, cell structure was friction-stir welded with a compositionally modified 1100 aluminum alloy.
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