Heterogeneous material gradient structure connecting joint and preparation method thereof

Abstract

The invention provides a heterogeneous material gradient structure connecting joint and a preparation method thereof, and relates to the technical field of material connection. The heterogeneous material gradient structure connecting joint comprises a connecting part, a first base material part and a second base material part, and the connecting part comprises a first gradient structure and a second gradient structure which are mutually embedded; the first base material part is connected to the end, close to the first gradient structure, of the connecting part, the second base material part is connected to the end, away from the first base material part, of the connecting part, the material of the second base material part is the same as that of the second gradient structure, and in the direction, away from the first base material part, of the connecting part, the space density of the first gradient structure is gradually reduced; and the space density of the second gradient structure is gradually increased. According to the heterogeneous material gradient structure connecting joint, structures of different materials can form a gradient transition structure at the connecting part, so that transition of material performance is achieved, sudden change of the materials of the different materials at the connecting part is avoided, the connecting strength of the heterogeneous materials is enhanced, and meanwhile, the invention provides a preparation method of the heterogeneous material gradient structure connecting joint.

Description

technical field [0001] The invention relates to the technical field of material connection, in particular to a heterogeneous material gradient structure connection joint and a preparation method thereof. Background technique [0002] In order to achieve specific functionality, it is often necessary to join different materials together in engineering. However, because the properties of the two materials do not match, a large interfacial stress will be generated during the loading process, which can easily lead to interface damage. [0003] In related technologies, the traditional solutions for connecting dissimilar materials are mechanical connection, welding, etc., each of which has defects that cannot be ignored. Among them, mechanical connection, such as the use of screws and nuts, will locally weaken the strength of the base material structure, and there are strict space restrictions and design requirements at the connection part. The welding of dissimilar metal materia...

AI Technical Summary

Problems solved by technology

The welding of dissimilar metal materials will produce brittle phases such as intermetallic compounds, which seriously weakens the connection strength.

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