Closed-Loop Control of the Thermal Stir Welding Process to Enable Rapid Process/Part Qualification, Phase II

Metadata Updated: November 12, 2020

Thermal Stir Welding (TSW) provides advancement over the more conventional Friction Stir Welding (C-FSW) process because it separates the primary processes variables thereby allowing independent control of metal stirring and forging from the stir zone temperature. However, the feedback for precise control of the stir zone temperature, and hence the process parameters to sustain that temperature within a narrow range, does not currently exist on the TSW machine at the NASA Marshall Space Flight Center (MSFC). At present, the current state of the art for the selection of process parameters for both TSWing and C-FSWing parameters is highly empirical and by nature is based on phenomenological knowledge. In response to this need, Keystone is proposing this Phase II STTR project to demonstrate the feasibility of closed-loop control of the TSW process and to enable the establishment of a analytically derived processing map to accelerate process understanding and selection of parameters for a given material and pin tool design. The close-loop control system will enable sustainment of a steady-state temperature at the stir rod as a function of spindle RPM and the travel velocity for a given z-axis loading and stir rod design. Use of this theoretically derived processing map will provide guidance in the optimization of the process parameter domain for solid-state welding of a given material. This capability will in turn enable rapid process qualification of the TSW process and components produced by the process.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Maintainer
Identifier TECHPORT_17970
Data First Published 2015-07-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
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Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
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Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://techport.nasa.gov/view/17970
Program Code 026:027
Source Datajson Identifier True
Source Hash b2da00fcf582c3dc108fc31f1203376c73641c12
Source Schema Version 1.1

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