Study of the dynamic metallurgical behavior of the brazing interface of cobalttungsten insert and steel rod revealed a fact that a poor cobalt belt and a clastic crystalline zone formed on the subsurface of cobalttungsten carbide in the dynamic process of fusion and diffusion, which, in turn, brought about microscopic cracks.

Influence of Sb on Sn-0.7Cu solder s melting point and soldering interface;

Singular boundary elements at crack tip and the stress intensity factors calculation of interfacial crack;

In this paper,a class of welding problem with interfacial crack is studied by the method of complex variable and the theory of boundary value problems of analytic functions.

The present models used in seismic response analysis of arch darns, such as Fenves model and Dowlings model, have the shortcodring that the accuracy to simulate the contact state between cracked surfaces is not high.