High-damping titanium alloy with heterogeneous gradient structure and preparation method and application thereof

By using selective laser powder bed melting (SLM) to prepare high-damping titanium alloys with heterogeneous gradient structures, the problems of low strength and high cost of existing titanium alloys have been solved, achieving improved high-damping performance and resource conservation, making them suitable for marine engineering and aerospace fields.

CN121320783BActive Publication Date: 2026-06-09辽宁材料实验室
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
辽宁材料实验室
Filing Date
2025-10-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing high-damping titanium alloys suffer from low strength, high cost, and a shortage of rare metal resources, making it difficult to meet the high-load application requirements in fields such as marine engineering and aerospace.

Method used

Selective laser powder bed melting technology was used to prepare titanium alloys with heterogeneous gradient structures containing Nb-rich, Nb-poor, and Nb-free regions by controlling laser power, scanning speed, and protective atmosphere. The grain size and distribution of the α and β phases were also controlled to achieve high damping performance.

Benefits of technology

It achieves improved high damping performance, with a damping factor of over 0.016, reduces manufacturing costs, and minimizes the use of rare metals, making it suitable for manufacturing complex-shaped components.

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Abstract

The application provides a high-damping titanium alloy with a heterogeneous gradient structure and a preparation method and application thereof. The high-damping titanium alloy with the heterogeneous gradient structure comprises the following chemical components in percentage by mass: 15 wt.%<=Nb<=25 wt.%, 0<N<=0.020 wt.%, 0<H<=0.015 wt.%, 0<O<=0.25 wt.%, 0<C<=0.022 wt.%, and the balance of Ti and inevitable impurities. The concentration content of the Nb element in the Nb-rich region, the Nb-poor region and the Nb-free region in the high-damping titanium alloy with the heterogeneous gradient structure is distributed in a decreasing manner from high to low. The application takes titanium niobium pre-alloy powder as raw material, and is formed by selective laser powder bed fusion printing, so that material waste is reduced, and the preparation cost is reduced.
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Citation Information

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