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Deformation and failure of thin brazed joints—microscopic considerations

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Abstract

Experimental data are presented on the microscopic aspects of the strength and deformation of thin brazed joints. Determination of the shear stress distribution at the braze interface revealed that the interfacial shear intensity increases as the thickness to diameter ratio,t/d, increases. The contribution of geometrical constraint (triaxiality) to joint strengthening was found to increase drastically ast/d decreases whereas the role of strain hardening in joint strengthening was found to change from one of delaying macroscopic instability in thick joints to the microscopic role of delaying microvoid coalescence in thin joints. Stress-strain measurements of both the braze metal and adjacent layers of the base metal showed that increasing triaxiality (lowert/d) results in lower axial strains within the joint for any given axial stress. In addition, base metal yielding was found to cause large increases in plastic strain within the brazed joint.

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Authors and Affiliations

  1. Stanford University, Stanford, Calif.

    A. J. West (Research Scientist)

  2. Center for Naval Analyses, Washington, D. C.

    H. J. Saxton (Research Associate)

  3. Stanford University, USA

    C. R. Barrett (Associate Professor)

  4. Stanford University, Los Angeles, Calif.

    A. S. Telelman (Professor and Materials Science Dept. Head)

Authors
  1. A. J. West
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  2. H. J. Saxton
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  3. A. S. Telelman
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  4. C. R. Barrett
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West, A.J., Saxton, H.J., Telelman, A.S. et al. Deformation and failure of thin brazed joints—microscopic considerations. Metall Trans 2, 1009–1017 (1971). https://doi.org/10.1007/BF02664232

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  • DOI: https://doi.org/10.1007/BF02664232

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