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Record Details

Record 23 of 2044
Deformation During Friction Stir Welding
Offline Availability: Go to Request Form
Author and Affiliation:
White, Henry J.(State Univ. of New York, Dept. of Materials Science and Engineering, Stony Brook, NY United States)
Abstract: Friction Stir Welding (FSW) is a solid state welding process that exhibits characteristics similar to traditional metal cutting processes. The plastic deformation that occurs during friction stir welding is due to the superposition of three flow fields: a primary rotation of a radially symmetric solid plug of metal surrounding the pin tool, a secondary uniform translation, and a tertiary ring vortex flow (smoke rings) surrounding the tool. If the metal sticks to the tool, the plug surface extends down into the metal from the outer edge of the tool shoulder, decreases in diameter like a funnel, and closes up beneath the pin. Since its invention, ten years have gone by and still very little is known about the physics of the friction stir welding process. In this experiment, an H13 steel weld tool (shoulder diameter, 0.797 in; pin diameter, 0.312 in; and pin length, 0.2506 in) was used to weld three 0.255 in thick plates. The deformation behavior during friction stir welding was investigated by metallographically preparing a plan view sections of the weldment and taking Vickers hardness test in the key-hole region.
Publication Date: Jul 01, 2002
Document ID:
20020068840
(Acquired Sep 13, 2002)
Subject Category: MECHANICAL ENGINEERING
Document Type: Technical Report
Publication Information: Research Reports: 2001 NASA/ASEE Summer Faculty Fellowship Program; LIV-1 - LIV-5; (NASA/CR-2002-211840); (SEE 20020068792)
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL United States
Organization Source: State Univ. of New York; Dept. of Materials Science and Engineering; Stony Brook, NY United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: FRICTION STIR WELDING; VICKERS HARDNESS; PLASTIC DEFORMATION; HARDNESS TESTS; METALLOGRAPHY; FLOW DISTRIBUTION; METAL PLATES
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