Northwest Manufacturing Initiative

Abstract

This research evaluated increased welding productivity and resulting fracture properties of 500BHN hardness Mil-A- 46100E, 16mm thick steel plate welded using a digitally controlled time twin wire Fronius welding system compared to single wire GMAW welding. Weld metal and heat affected zones were evaluated using Charpy and E399 fracture toughness methods. The influence of temperature, loading rate, CVN notch root radius, notch location, (weld and 2 heat affected zone locations) and quasi-static and dynamic E399 fracture toughness tests were evaluated to determine the influence of fracture test methods and welding procedures on toughness. Room temperature E399 tests, (CTS) were carried out under quasi-static and dynamic (4,000,000 and 8,000,000 pounds per second) loading rates. A K-type joint for single wire GMAW facilitated notch/crack locations in predominately individual coarse and fine heat affected zones and in the weld center line. Dual wire GMAW required a double bevel joint configuration to provide sufficient root pass penetration. High productivity dual wire weldments achieved equivalent or improved toughness compared to single wire weldments. E399 toughness was not significantly strain rate or HAZ location sensitive. Pre-cracked CVN specimen toughness was significantly degraded relative to standard notched CVN data. The goals of this grant may be organized into two areas, the Smart Automation Laboratory, and the Distance Manufacturing Masters program. The Smart Automation project aims to augment an existing laboratory in the area of agile manufacturing. The Distance Masters Program aims to leverage an existing MS in Mfg Engineering Technology to service a wider audience and to tune the curriculum to service the needs of defense contractors.

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Document Details

Document Type
Technical Report
Publication Date
Mar 26, 2013
Accession Number
ADA583519

Entities

People

  • Ehsan Porgharibshahishahrebabak
  • Ellen A. Fuller
  • J. R. Evans
  • John C. Anderson
  • Mattea Brown
  • Richard Nordstrom
  • Robert Turpin
  • Thomas Quale
  • William E. Wood

Organizations

  • Organization for Economic Initiatives

Tags

Communities of Interest

  • Autonomy

DTIC Thesaurus Topics

  • Chemistry
  • Dynamic Tests
  • Engineering
  • Fabrication
  • Hardness
  • Manufacturing
  • Manufacturing Engineering
  • Materials
  • Mechanical Properties
  • Productivity
  • Standards
  • Strain Rate
  • Systems Engineering
  • Test And Evaluation
  • Test Methods
  • Toughness
  • Weld Metal

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy