Progress in the Preparation of High Entropy Alloys by Laser Additive Manufacturing Technology
At present,the traditional design concept of alloying materials based on enthalpy change is approaching its limit,while new metal materials based on entropy change design have a large degree of freedom in the design of medium and high entropy alloys.Therefore,the medium and high entropy alloys make up for the shortcomings of room temperature brittleness and metastable crystallization of metastable materials and continuously make breakthroughs in performance.Laser additive manufacturing technology differs from traditional processing design and manufacturing concepts,providing new possibilities for promoting the development of advanced alloy materials and has become a key technique for linking materials and products.In the present paper,based on laser additive manufacturing technology,the research status of high-entropy alloy coating prepared by laser cladding technology,high-entropy alloy prepared by 3D printing technology and high-entropy high-temperature shape memory alloy prepared by 4D printing technology were described from three dimensions of 2D,3D and 4D,respectively.The key technical problems and solutions in the current research were discussed.Finally,the preparation of advanced alloy materials by laser additive manufacturing technology was summarized and prospected.
laser additive manufacturinghigh entropy alloyshigh entropy high temperature shape memory alloys4D printing
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