A Preliminary Report on the Strength and Metallography of a Bimetallic Friction Stir Weld Joint Between AA6061 and MIL-DTL-46100E High Hardness Steel Armor

Abstract

One half inch thick plates of 6061-T6 aluminum alloy and High Hardness steel armor (MIL-STD-46100) were successfully joined by the friction stir welding (FSW) process using a tungsten-rhenium stir tool. Process parameter variation experiments, which included inductive pre-heating, tool design geometry, plunge and traverse rates, tool offset, spindle tilt, and rotation speed, were conducted to develop a parameter set which yielded a defect free joint. Laboratory tensile tests exhibited a maximum yield stress of 176 MPa, which is 91% of the strength of a comparable all-AA6061 FSW joint. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDAX) analysis also show atomic diffusion at the material interface region.

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Document Details

Document Type
Technical Report
Publication Date
Nov 26, 2012
Accession Number
ADA580292

Entities

People

  • Richard. Miller

Tags

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Diffusion
  • Electron Microscopes
  • Electron Microscopy
  • Fabrication
  • Friction
  • Friction Stir Welding
  • Hardness
  • Joints
  • Materials
  • Microscopes
  • Microscopy
  • Scanning Electron Microscopes
  • Scanning Electron Microscopy
  • Welding
  • Welds

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics