Friction stir welding for aluminum metal matrix composites (MMC's) : MSFC Center director's discretionary fund final report, project no. 98-09 / J.A. Lee, R.W. Carter, and J. Ding.

Format:

Book

Government document

Author/Creator:

Lee, J. A., author.

Carter, R. W., author.

Ding, J., author.

Contributor:

George C. Marshall Space Flight Center, issuing body.

Series:

NASA technical memorandum ; 1999-209876.

NASA/TM ; 1999-209876

Language:

English

Subjects (All):

Aluminum.

Friction welding.

Functionally gradient materials.

Metallic composites.

Welded joints.

aluminum (metal).

friction welding.

Medical Subjects:

Aluminum.

Genre:

Online resources.

Physical Description:

1 online resource (vi, 21 pages) : illustrations

Other Title:

MSFC Center director's discretionary fund final report, project no. 98-09

Place of Publication:

MSFC, Alabama : National Aeronautics and Space Administration, Marshall Space Flight Center, December 1999.

Summary:

This technical memorandum describes an investigation of using friction stir welding (FSW) process for joining a variety of aluminum metal matrix composites (MMC's) reinforced with discontinuous silicon-carbide (SiC) particulate and functional gradient materials. Preliminary results show that FSW is feasible to weld aluminum MMC to MMC or to aluminum-lithium 2195 if the SiC reinforcement is less than 25 percent by volume fraction. However, a softening in the heat-affected zone was observed and is known to be one of the major limiting factors for joint strength. The pin tool's material is made from a low-cost steel tool H-13 material, and the pin tool's wear was excessive such that the pin tool length has to be manually adjusted for every 5 ft of weldment. Initially, boron-carbide coating was developed for pin tools, but it did not show asignificant improvement in wear resistance. Basically, FSW is applicable mainly for butt joining of flatplates. Therefore, FSW of cylindrical articles such as a flange to a duct with practical diameters ranging from 2-5 in. must be fully demonstrated and compared with other proven MMC joining techniques for cylindrical article

Notes:

"December 1999."

"Performing organization: George C. Marshall Space Flight Center"--Report documentation page

Pdf

Includes bibliographical references (pages 20-21).

Online resource; title from PDF title page (NASA, viewed Apr 21, 2017).

"Project no. 98-09."

Other Format:

Print version: Friction stir welding for aluminum metal matrix composites (mmc's) (center director's discretionary final report)

Microfiche version: Lee, J.A. Friction stir welding for aluminum metal matrix composites (MMC's)

OCLC:

703646163

Publisher Number:

NASA/TM-209876