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Nanjing University of Aeronautics and Astronautics' Gu Dongdong Team Publishes in Science China: Laser Heat Input Control Enables High-Performance Tungsten Alloy LPBF Forming
2026-11-04
Professor Gu Dongdong's team at Nanjing University of Aeronautics and Astronautics published "Laser additive manufacturing of high-performance tungsten alloy by controlling thermal input" in Science China Technological Sciences (2026, 69(2): 1220201). Using yttrium (Y)-alloyed tungsten, they formed W-Y alloy via LPBF at different laser energy densities and combined finite element simulation to reveal temperature field distribution and metallurgical defect formation mechanisms. At the optimal energy density, density reached 98.6%, average grain size was 15.83 μm, ultimate compressive strength was 1531.93 MPa, elongation was 21.57%, and microhardness was 556.4 HV0.2, significantly improving strength and wear resistance compared with pure tungsten samples. New progress has been made on the cracking and densification challenges of laser additive manufacturing of tungsten-based refractory alloys—the route of laser heat input control plus rare-earth alloying has direct reference value for domestic tungsten powder manufacturers' powder grade development (W-Y series).
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南航顾冬冬团队Science China刊文：激光热输入调控实现高性能钨合金LPBF成形
南京航空航天大学顾冬冬教授团队在 Science China Technological Sciences（2026, 69(2): 1220201）发表 Laser additive manufacturing of high-performance tungsten alloy by controlling thermal input：以稀土钇（Y）合金化钨，在不同激光能量密度下 LPBF 成形 W-Y 合金，结合有限元模拟揭示温度场分布与冶金缺陷形成机制。最佳能量密度下致密度达 98.6%，平均晶粒 15.83 μm，极限抗压强度 1531.93 MPa、延伸率 21.57%、显微硬度 556.4 HV0.2，较纯钨试样强度与耐磨性显著改善。钨基难熔合金激光增材成形的裂纹与致密化难题取得新进展——激光热输入调控+稀土合金化路线，对国内钨粉厂商的粉末牌号开发（W-Y 系列）具有直接参考价值。