Experimental Thermal Analysis of Friction Stir Processing

Darras, Bassil M.; Omar, M.A.; Khraisheh, Marwan

doi:10.4028/0-87849-428-6.3801

Cited by 12 publications

(17 citation statements)

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“…The heat exerted on the samples during FSW and SFSW has a significant effect on the microstructure, microhardness, and tensile properties of the welded product. 19–22 The thermal histories presented in Figure 3 were used to view and compare the peak temperature reached when welding different samples, the cooling rate, and how long the temperature stayed above a reference point. The results presented in this section were used to examine the effect of different process parameters on the resulting microstructure and mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Experimental investigation of underwater friction-stir welding of 5083 marine-grade aluminum alloy

Kishta

Darras

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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Friction-stir welding has emerged as an effective technique for the challenging task of welding aluminum alloys. This article presents a detailed experimental study on underwater friction-stir welding of 5083 marine-grade aluminum alloy. The effects of submersion, rotational speed, and translational speed were investigated. The thermal histories, void fractions, microhardness, and tensile properties of the welded alloy samples, as well as power consumption of the process, were measured and analyzed. The results showed that underwater friction-stir welding produced good tensile properties and led to a significant reduction in the void fraction.

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Section: Resultsmentioning

confidence: 99%

Experimental investigation of underwater friction-stir welding of 5083 marine-grade aluminum alloy

Kishta

Darras

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…In this work, the dimensions of the radii of the pin and the shoulder are r p = 3.175 mm and r s = 6.350 mm, respectively. These numbers are the actual dimensions of the tool currently used in our laboratory to conduct FSP experiments ( Ref 4,5,14). A flat shoulder and a flat cylindrical pin are considered in this analysis.…”

Section: Model Developmentmentioning

confidence: 99%

Analytical Modeling of Strain Rate Distribution During Friction Stir Processing

Darras

Khraisheh

2007

J. of Materi Eng and Perform

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Friction Stir Processing (FSP) is becoming an acceptable technique for modifying the grain structure of sheet metals. One of the most important issues that hinder the widespread use of FSP is the lack of accurate models that can predict the resulting microstructure in terms of process parameters. Most of the work that has been done in the FSP field is experimental, and limited modeling activities have been conducted. In this work, an analytical model is presented that can predict the strain rate distribution and the deformation zone in the friction stir processed zone as a function of process parameters. In the model, the velocity fields within the processed zone are determined by incorporating the effects of both the shoulder and the pin of the tool on the material flow. This is achieved by introducing state variables and weight functions. The model also accounts for different interfacial conditions between the tool and the material. The effects of different process parameters and conditions on the velocity fields and strain rate distributions are discussed. The results clearly show that the model can successfully predict the shape of the deformation zone and that the predicted strain rate values are in good agreement with results reported in the literature.

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“…It is established that the thermal fields generated during FSP plays significant role in grain refinement (resulting microstructure) and properties of processed material [5]. The main objective of this work is to investigate the effects tool pin profiles on the temperature field during FSP at low heat-input condition.…”

Section: Temperature Distributionmentioning

confidence: 99%

“…The degree of plastic deformation and the heat generation during FSP are the dominant factors determining grain refinement at processed zone [5,6]. Therefore, it is important to understand about the temperature distribution during the FSP.…”

Section: Introductionmentioning

confidence: 99%