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Joining dispersion-strengthened, rapidly solidified, P/M Al alloys

  • Joining P/M Alloy
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Abstract

The weldability of dispersion-strengthened, rapidly solidified Al-Fe alloys is limited by the residual hydrogen content, solidification behavior, and the high-temperature deformation behavior of these alloys. Consequently, the selection and application of welding processes and conditions to join these aluminum alloys—either to themselves or with other engineering alloys—must be based on the ability of the welding process conditions to eliminate or minimize the occurrence of fusion zone porosity; “recreate” a microstructure similar to the rapidly solidified, powder metallurgy base alloy; and/or “retain” the superior base alloy microstructure in the weld zone. Toward this end, an understanding of the physical metallurgy and high-temperature deformation characteristics of the dispersion-strengthened, rapidly solidified, powder metallurgy Al-Fe alloys and the effects of welding process conditions and parameters on weld solidification behavior and microstructural development in the weld zone will enable one to optimize welding conditions to obtain desirable combinations of weld microstructure and mechanical properties.

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Authors and Affiliations

  1. Concurrent Technologies Corporation, USA

    K. Sampath Ph.D. (principal engineer, member of TMS)

  2. Ohio State University, USA

    W. A. Baeslack III Ph.D. (associate dean for research and college development, member of TMS)

Authors
  1. K. Sampath Ph.D.
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  2. W. A. Baeslack III Ph.D.
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Sampath, K., Baeslack, W.A. Joining dispersion-strengthened, rapidly solidified, P/M Al alloys. JOM 46, 41–47 (1994). https://doi.org/10.1007/BF03220747

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