The Processes of Fragmentation, Intermixing and Fusion upon Explosion Welding

On the basis of the results obtained for joints of dissimilar metals such as copper-tantalum, iron-silver, it has been cleared out the reason of immiscible suspensions mixing upon explosion welding. It has been found that the interface (waveless or wavy) is not smooth and contains inhomogeneities, namely, cusps and local melting zones. The role of granulating fragmentation providing partitioning of initial materials as a main channel of input energy dissipation has been revealed. It has been shown that in joints of metals possessing normal solubility the local melting zones are true solutions, but if metals possess no mutual solubility the local melting zones are colloidal solutions. During the solidification emulsion is a danger to the joint continuity because of possible delamination, and suspension, by contrast, can contribute to the dispersion hardening of joint. (C) 2012 The Authors. Published by Elsevier Ltd. Selection and/or peer review under responsibility of American Applied Science Research Institute