Additive manufacturing of aluminum alloys and methods of processing and use thereof

By using Al-Mg-Sc-Ti aluminum alloy powder and a two-stage heat treatment process, Al3(Scx,Ti1-x) nano-precipitates are formed, which solves the problem of balancing strength and plasticity in existing Al-Mg-Sc-Zr aluminum alloy powder additive manufacturing. This results in high-strength, high-plasticity, and low-cost aluminum alloy materials suitable for structural components in aerospace, marine vessels, rail transportation, and automobile manufacturing.

CN122210077APending Publication Date: 2026-06-16GUANGZHOU INST OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU INST OF TECH
Filing Date
2026-04-30
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing Al-Mg-Sc-Zr aluminum alloy powder additive manufacturing processes struggle to simultaneously achieve both strength and plasticity, and the high cost of Sc limits its application in cost-sensitive fields.

Method used

Al-Mg-Sc-Ti aluminum alloy powder is used, and the solidification structure is controlled through a two-stage heat treatment process. The Al3(Scx,Ti1-x) nano-precipitates are formed by combining Sc and Ti elements. The two-stage heat treatment process is used to refine the grains and uniformly distribute the strengthening phase, thereby improving the yield strength and tensile strength of the aluminum alloy, while also improving its plasticity.

Benefits of technology

It achieves high strength and high plasticity of aluminum alloys, reduces manufacturing costs, and is suitable for structural components in aerospace, marine vessels, rail transportation and automobile manufacturing and other fields.

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Abstract

The application relates to an additive manufacturing aluminum alloy and a processing method and application thereof, wherein the processing method mainly comprises the following steps: S1, preparing an aluminum alloy powder raw material; S2, additive manufacturing the aluminum alloy powder raw material to obtain a formed piece; S3, first-stage heat treatment of the formed piece under a first temperature condition, and cooling to room temperature after completion; and S4, second-stage heat treatment of the formed piece under a second temperature condition to obtain a sample; wherein the second temperature condition is greater than the first temperature condition, so that fine nanoscale precipitated phases are uniformly and dispersedly distributed. The processing method of the additive manufacturing aluminum alloy can obtain an aluminum alloy with excellent yield strength and tensile strength, good plasticity and reduced manufacturing cost.
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