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Deformation effects related to pin-t...
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Davis, William Charles.
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Deformation effects related to pin-tool geometry during friction-stir welding of aluminum alloy 6061.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Deformation effects related to pin-tool geometry during friction-stir welding of aluminum alloy 6061./
作者:
Davis, William Charles.
面頁冊數:
66 p.
附註:
Source: Masters Abstracts International, Volume: 43-06, page: 2401.
Contained By:
Masters Abstracts International43-06.
標題:
Engineering, Metallurgy. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1425896
ISBN:
0542042657
Deformation effects related to pin-tool geometry during friction-stir welding of aluminum alloy 6061.
Davis, William Charles.
Deformation effects related to pin-tool geometry during friction-stir welding of aluminum alloy 6061.
- 66 p.
Source: Masters Abstracts International, Volume: 43-06, page: 2401.
Thesis (M.S.)--The University of Texas at El Paso, 2005.
Friction-stir welding (FSW) is a solid-state joining process where a non-consumable pin-tool is plunged, rotated, and traversed along a square butt weld joint using conventional milling techniques. The process involves superplastic deformation and results in a weld zone characterized by dynamically recrystallized, equiaxed grains. FSW has been demonstrated to be a favorable process for the joining of a variety of metals, alloys, and metal matrix composites (MMC). Two particular studies involving the FSW of cast aluminum 359 and aluminum alloy 6061 with 20% SiC MMC document the tool wear phenomena. The studies indicate that a self-optimization process occurs changing the geometry of the pin-tool as it is worn away and altering material flow within the weld zone. This study seeks to evaluate and compare welds made using these two (threaded screw and wear-optimized) pin-tool geometries.
ISBN: 0542042657Subjects--Topical Terms:
1023648
Engineering, Metallurgy.
Deformation effects related to pin-tool geometry during friction-stir welding of aluminum alloy 6061.
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Friction-stir welding (FSW) is a solid-state joining process where a non-consumable pin-tool is plunged, rotated, and traversed along a square butt weld joint using conventional milling techniques. The process involves superplastic deformation and results in a weld zone characterized by dynamically recrystallized, equiaxed grains. FSW has been demonstrated to be a favorable process for the joining of a variety of metals, alloys, and metal matrix composites (MMC). Two particular studies involving the FSW of cast aluminum 359 and aluminum alloy 6061 with 20% SiC MMC document the tool wear phenomena. The studies indicate that a self-optimization process occurs changing the geometry of the pin-tool as it is worn away and altering material flow within the weld zone. This study seeks to evaluate and compare welds made using these two (threaded screw and wear-optimized) pin-tool geometries.
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Single-pass friction-stir welding was performed along the 4&inches; direction on commercial plates of aluminum alloy 6061 with dimensions of 4&inches; x 2.25&inches; x 0.25&inches;. The plates were clamped on a steel backing plate and the friction-stir welding tool was mounted in a 1.9 cm diameter milling chuck. The plunge depth was 0.025&inches; at the back of the shoulder and a lead angle of 1° was used. The rotation speeds were 500 and 1000 RPM and the traverse speeds were 3, 5, and 7 mm/s. The pin tool geometry was classified as screw or wear-optimized and each pin tool was slightly foreshortened. Samples were examined by optical metallography and Vickers microhardness measurements were taken along a mid-thickness line traversing the weld zone. Grain size measurements were also calculated.
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