Journal ArticleDOI
Thermal history analysis of friction stir processed and submerged friction stir processed aluminum
TLDR
In this paper, the authors developed equations to model the rate of heat input from different geometries of friction stir processing (FSP) tools and compared with actual heat input obtained from embedded thermocouples within the stirred region.Abstract:
In this research, equations are developed to model the rate of heat input from different geometries of friction stir processing (FSP) tools. The model is then compared with actual heat input obtained from embedded thermocouples within the stirred region. The cooling curves obtained from the thermocouple data are then applied to the Derby–Ashby model for high angle grain boundary migration to predict the final grain size of a bulk sample produced by the friction stirring method. Submerged friction stir processing (SFSP) is introduced as a way of increasing the cooling rate of the bulk samples in an attempt to decrease the grain size. Microstructures obtained from both FSP and SFSP are characterized using transmission electron microscopy.read more
Citations
More filters
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
Recent Advances in Friction Stir Welding/Processing of Aluminum Alloys: Microstructural Evolution and Mechanical Properties
TL;DR: Friction stir welding (FSW) has been termed as green technology due to its energy efficiency and environment friendliness as mentioned in this paper, which is an enabling technology for joining metallic materials, in particular lightweight high-strength aluminum and magnesium alloys.
Journal ArticleDOI
Integrated modeling of friction stir welding of 6xxx series Al alloys: Process, microstructure and properties
TL;DR: In this paper, an integrated modeling framework for friction stir welding of 6xxx series Al alloys has been established and applied to the 6005A and 6056 alloys.
Journal ArticleDOI
The strength of friction stir welded and friction stir processed aluminium alloys
TL;DR: In this article, the local strength of friction stir (FS) welds and FS processed aluminium alloys in heat-treatable aluminum alloys is dominated by precipitation hardening, and possible improvements are explored.
Journal ArticleDOI
Submerged friction stir processing of AZ31 Magnesium alloy
TL;DR: In this paper, the effects of submerging conditions on thermal fields, power consumption, resulting grain structure and tensile properties were discussed in this work, while sub-merged in room-temperature and warm water.
References
More filters
Journal ArticleDOI
Microstructural investigation of friction stir welded 7050-T651 aluminium
TL;DR: In this paper, the grain structure, dislocation density and second phase particles in various regions including the dynamically recrystallized zone (DXZ), thermo-mechanically affected zone (TMAZ), and heat-affected zone (HAZ) of a friction stir weld aluminum alloy 7050-T651 were investigated and compared with the unaffected base metal.
Journal ArticleDOI
An analytical model for the heat generation in friction stir welding
TL;DR: In this article, the authors established an analytical model for heat generation by friction stir welding (FSW), based on different assumptions of the contact condition between the rotating tool surface and the weld piece.
Journal ArticleDOI
Diffusion of Al26 and Mn54 in Aluminum
T. S. Lundy,J. F. Murdock +1 more
TL;DR: In this paper, the diffusion coefficients of Al26 and Mn54 in aluminum have been determined between 450° and 650°C. The exact solution to Fick's second law for the appropriate boundary conditions was used in treating the data.
Journal ArticleDOI
Heat Transfer in Friction Stir Welding—Experimental and Numerical Studies
Yuh J. Chao,X. Qi,W. Tang +2 more
TL;DR: In this article, the authors formulated the heat transfer of the FSW process into two boundary value problems (BVP) for the tool and a transient BVP for the workpiece.
Journal ArticleDOI
Thermal modeling of friction stir welding in a moving coordinate system and its validation
M. Song,Radovan Kovacevic +1 more
TL;DR: In this paper, a three-dimensional heat transfer model for friction stir welding (FSW) is presented; a moving coordinate is introduced to reduce the difficulty of modeling the moving tool.
Related Papers (5)
Recent advances in friction-stir welding : Process, weldment structure and properties
Relationship between grain size and Zener¿Holloman parameter during friction stir processing in AZ31 Mg alloys
C.I. Chang,C.J. Lee,J.C. Huang +2 more