一种基于激光粉末床熔化技术制备NiCoCrFeAlTi系高熵合金的方法
The NiCoCrFeAlTi high-entropy alloy was prepared by laser powder bed melting technology, which solved the problems of formability and density, and realized the preparation of high-performance high-entropy alloys suitable for multiple industrial fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAZHONG UNIV OF SCI & TECH
- Filing Date
- 2023-11-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for preparing high-entropy alloys suffer from narrow forming windows, poor formability, low density, and mechanical properties that need improvement. In particular, macroscopic cracks and micropores exist in additive manufacturing, leading to poor formability.
Laser powder bed melting technology was used to prepare NiCoCrFeAlTi-based high-entropy alloy pre-alloy powder by gas atomization. The powder was then melted and deposited layer by layer in the laser melting system according to the set scanning path and process parameters to prepare a high-entropy alloy with high density and uniform microstructure.
It achieves high density (up to 99.94%), good formability, and excellent comprehensive mechanical properties (yield strength 812.6MPa, fracture strength 1073.4MPa, elongation 32.5%), and is suitable for aerospace, shipbuilding, chemical, automotive, rail transportation and defense industries.
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Figure CN117548688B_ABST