Optimization method of CuAlNi memory alloy 4D printing process

Abstract

The invention relates to the technical field of additive manufacturing, in particular to a CuAlNi memory alloy 4D printing process optimization method. Comprising the following steps that pre-alloyed powder is prepared and subjected to selective laser melting block forming within a small parameter range, and the size and printability of a molten pool are analyzed; through finite element analysis, a theoretical result of the shape and size of the molten pool under the combination of different technological parameters in a large range is obtained; the finite element simulation result is optimized and calculated based on the actual molten pool size, and a large-parameter-range theoretical printable performance distribution diagram and an optimal technological parameter combination interval of the high-temperature shape memory alloy are obtained; and carrying out printability verification and phase transition temperature and shape memory effect test on an optimized process parameter interval according to a large-parameter range printability prediction result. By means of the process design optimization method, rapid and efficient process optimization of CuAlNi high-temperature shape memory alloy 4D printing preparation with the high phase transition temperature and the excellent shape memory performance is achieved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a process optimization method for 4D printing of CuAlNi memory alloys. Background technique [0002] Additive manufacturing technology (commonly known as "3D printing" technology) is a technology developed in the past three decades based on digital model design software to decompose materials into layer-by-layer data to achieve cumulative manufacturing of solid parts. It has the advantages of high material utilization rate, good material adaptability, no need for drawings and tooling equipment, and high degree of digitization. It is widely used in machinery manufacturing, aerospace, biomedical and other fields. As the center of gravity in the intelligent development of high-end equipment gradually changes to the requirements of intelligent characteristics, 4D printing technology uses 3D printing technology to manufacture special components to achieve controllable c...

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Problems solved by technology

Although this provides an effective means to control the phase transition temperature and shape memory effect of Cu-based shape memory alloys, the specific powder composition needs to be individually customized in the powder making process, and it is extremely important to control the phase transition temperature and shape memory effect by changing the composition. the cost of

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