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Hardness-tensile property relationships for HAZ in 6061-T651 aluminum

Journal Article


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Abstract


  • High-strength aluminum is used extensively in industry, with welding being a widely used fabrication method. This work focuses on welding of 6061-T651 aluminum and establishment of the hardness-tensile properties relationship in the heat-affected zone (HAZ) of a gas metal arc weld using 4043 filler material. Test welds were prepared from 12.7-mm-thick plate with a single-V weld preparation. Base plate temperatures were measured with an array of eight embedded thermocouples during welding, relating temperature to properties at intervals from the weld. Through-thickness slices 1.7 mm thick were removed, by electric discharge machining, from the plate parallel to the weld at 2-mm intervals and extending from the weld center-line to 40 mm into the HAZ and base plate. Tensile samples were prepared from these slices, and tensile properties and hardness values measured to establish a relationship between these two parameters. Both EQUOTIP (portable hardness tester) and Vickers microhardness measurements were conducted and related to tensile properties. Although a significant body of work exists relating tensile properties to hardness, no previous study was found that used this approach. Most work appeared to use cross-weld tensile tests, which only give the point of lowest strength. Sections of base plate material having a different thickness (31.75 mm) from that of the welded samples, and from a different source, were thermally aged to four hardness values and the hardness-tensile relationship was also established for this material. These results were compared with those of the HAZ samples; the results were found to fall within the scatter band of HAZ results.

Authors


  •   Stathers, P A. (external author)
  •   Hellier, A K. (external author)
  •   Ripley, M I. (external author)
  •   Harrison, Robert P. (external author)
  •   Norrish, John

Publication Date


  • 2014

Citation


  • Stathers, P. A., Hellier, A. K., Harrison, R. P., Ripley, M. I. & Norrish, J. (2014). Hardness-tensile property relationships for HAZ in 6061-T651 aluminum. Welding Journal, 93 (8), 301-s-311-s.

Scopus Eid


  • 2-s2.0-84905816360

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3855&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2846

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 301-s

End Page


  • 311-s

Volume


  • 93

Issue


  • 8

Abstract


  • High-strength aluminum is used extensively in industry, with welding being a widely used fabrication method. This work focuses on welding of 6061-T651 aluminum and establishment of the hardness-tensile properties relationship in the heat-affected zone (HAZ) of a gas metal arc weld using 4043 filler material. Test welds were prepared from 12.7-mm-thick plate with a single-V weld preparation. Base plate temperatures were measured with an array of eight embedded thermocouples during welding, relating temperature to properties at intervals from the weld. Through-thickness slices 1.7 mm thick were removed, by electric discharge machining, from the plate parallel to the weld at 2-mm intervals and extending from the weld center-line to 40 mm into the HAZ and base plate. Tensile samples were prepared from these slices, and tensile properties and hardness values measured to establish a relationship between these two parameters. Both EQUOTIP (portable hardness tester) and Vickers microhardness measurements were conducted and related to tensile properties. Although a significant body of work exists relating tensile properties to hardness, no previous study was found that used this approach. Most work appeared to use cross-weld tensile tests, which only give the point of lowest strength. Sections of base plate material having a different thickness (31.75 mm) from that of the welded samples, and from a different source, were thermally aged to four hardness values and the hardness-tensile relationship was also established for this material. These results were compared with those of the HAZ samples; the results were found to fall within the scatter band of HAZ results.

Authors


  •   Stathers, P A. (external author)
  •   Hellier, A K. (external author)
  •   Ripley, M I. (external author)
  •   Harrison, Robert P. (external author)
  •   Norrish, John

Publication Date


  • 2014

Citation


  • Stathers, P. A., Hellier, A. K., Harrison, R. P., Ripley, M. I. & Norrish, J. (2014). Hardness-tensile property relationships for HAZ in 6061-T651 aluminum. Welding Journal, 93 (8), 301-s-311-s.

Scopus Eid


  • 2-s2.0-84905816360

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3855&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2846

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 301-s

End Page


  • 311-s

Volume


  • 93

Issue


  • 8