A testing device and evaluation method for bonding strength of an ultrathin layered metal composite material

Abstract

The invention relates to a testing device and evaluation method for bonding strength of an ultrathin layered metal composite material. The device includes an upper punch and a lower die holder. The upper punch is provided with a projection and the lower die holder is provided with a groove. The surface, with the projection, of the upper punch faces downward, the surface, with the groove, of the lower die holder faces upward and assembling is performed to allow the projection of the upper punch is put into the groove of the lower die holder. According to application, one surface of the layeredmetal composite material is coated with glue, the surface with the glue adheres to the lower die holder, and one axis of symmetry of the layered metal composite material is in the groove of the lowerdie holder; a test piece to be heated is obtained; after the test piece to be heated is subjected to low-temperature gluing treatment, the upper punch is fixed to a pressure tester; and the upper punch moves downward to allow the projection of the upper punch to compress the groove of the lower die holder, thus completing a test. The device is reasonable and convenient to carry and apply and a testing method is simple. The device and the evaluation method can be used for some special environments.

Description

technical field [0001] The invention belongs to the field of performance evaluation of layered composite materials, and in particular relates to a testing device and an evaluation method for the bonding strength of ultra-thin metal layered composite materials. Background technique [0002] Layered metal composite material is a new type of material obtained by using composite technology to achieve a firm metallurgical bond between two or more metals with different physical, chemical and mechanical properties. Each layer of metal still maintains its original characteristics, but its overall physical, chemical and mechanical properties have been greatly improved compared with a single metal, and it is widely used in aerospace, machinery manufacturing and other fields. The main methods for preparing layered metal composites include hot rolling, diffusion welding, coating, and laser cladding. The interface structure of layered metal composites is generally composed of diffusion ...

AI Technical Summary

Problems solved by technology

However, for ultra-thin layered metal composites, the dimensions in the thickness direction do not meet the requirements for preparing tensile or shear test specimens.

Therefore, the bonding strength between layers of layered metal composites cannot be evaluated by conventional testing methods, and it is urgent to find a method for evaluating the bonding strength of ultra-thin layered metal composites.

Images