沈航杨光教授团队丨激光增材制造中几何缺陷的形成机理及控制方法
研究现状
激光沉积增材制造（LDM）过程中的几何缺陷严重影响制件成形精度和可重复性，制约了该技术在关键领域的应用。国内外学者对常见几何缺陷的形成机制、激光沉积制造过程监测及缺陷调控进行了深入研究，常见几何缺陷可分为表面不平整、熔化塌陷、翘曲变形、分层开裂四类。
LDM中的几何缺陷研究路线图
研究难点或瓶颈
LDM中的几何缺陷形成因素
未来展望
第三，过程监测与人工智能和数值模拟相结合，通过机器学习等人工智能技术准确地区分几何缺陷相关的信号信息并建立相关数据库，采用多物理场和多尺度数值模拟技术预测成形质量和潜在风险。
论文原文链接:
doi.org/10.1016/j.cjmeam.2022.100052
https://www.sciencedirect.com/science/article/pii/S2772665722000368
团队带头人介绍
团队研究方向
（1）增材制造工艺与装备；
（2）增材制造/修复、性能考核、评价和应用；
（3）增材制造缺陷形成机制及防控。
近年团队发表文章
[1] Yang G, Deng F, Zhou S, et al. Microstructure and mechanical properties of a novel Cu-reinforced maraging steel for wire arc additive manufacturing[J]. Materials Science and Engineering: A, 2021, 825: 141894.
[2] Guang Yang, Yilian Xie, Shuo Zhao, Lanyun Qin, Xiangming Wang, Bin Wu. Quality control: Internal defects formation mechanism of selective laser melting based on laser-powder-melt pool interaction: A review. Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers, 2022, 1(3).
[3] Qin Lanyun,Zhao Dongxu,Wang Wei,Yang Guang. Geometric defects identification and deviation compensation in laser deposition manufacturing[J]. Optics and Laser Technology,2022,155.
[4] Zhou Siyu, Wu Ke, Yang Guang, Wu Bin, Qin Lanyun, Wu Hao, Yang Chaoyue. Microstructure and mechanical properties of wire arc additively manufactured 205A high strength aluminum alloy: The comparison of as-deposited and T6 heat-treated samples[J]. Materials Characterization, 2022, 189: 111990.
[5] Deng Fangbin, Yang Guang, Wu Bin, Qin Lanyun, Zheng Jianshen, Zhou Siyu. Microstructure and mechanical properties of hybrid-manufactured maraging steel component using 4% nitrogen shielding gas fabricated by wrought-wire arc additive manufacturing[J]. Coatings, 2022, 12(3): 356.
[6] Zhou Siyu, Zhang Jianfei, Wang Jiayin, Yang Guang, Wu Ke, Qin Lanyun. Effect of Oxygen Levels in Tent Shielding Atmosphere on Microstructural and Mechanical Properties of Ti-6Al-4V Fabricated by Wire Arc Additive Manufacturing[J]. Journal of Materials Engineering and Performance, 2022: 1-10.
[7] Wu Bin,Huang Jianxin,Yang Guang,Ren Yuhang,Zhou Siyu,An Da. Effects of ultrasonic shot peening on fatigue behavior of TA15 titanium alloy fabricated by laser melting deposition[J]. Surface & Coatings Technology,2022,446.
