Study on strengthening mechanism and microstructure evolution of high-strength metals via cold spray additive manufacturing
冷喷涂增材制造高强金属的强化机理及微观结构演变研究

摘要

冷喷涂增材制造作为一种新兴的金属制造技术，展现出优异的材料性能和成形效率。本文系统研究了冷喷涂过程中高强金属的强化机理，重点分析喷涂材料在高速撞击与沉积过程中微观结构的演变规律。通过实验与表征手段揭示了颗粒变形、晶界重组及缺陷消除等关键过程对材料力学性能的影响。微观结构的优化是实现高强度和高韧性的关键，有助于推动冷喷涂技术在航空航天、汽车等高端制造领域的应用。本文为冷喷涂高强金属的工艺优化和性能提升提供了理论支持和实验依据。

Abstract

As an emerging metal manufacturing technology, cold spray additive manufacturing demonstrates excellent material properties and forming efficiency. This paper systematically investigates the strengthening mechanism of high-strength metals during the cold spraying process, with a focus on analyzing the evolution rules of the microstructure of sprayed materials during high-velocity impact and deposition. Through experimental and characterization methods, the effects of key processes such as particle deformation, grain boundary reconstruction, and defect elimination on the mechanical properties of materials are revealed. The optimization of microstructure is crucial for achieving high strength and toughness, which helps promote the application of cold spray technology in high-end manufacturing fields such as aerospace and automotive. This paper provides theoretical support and experimental basis for process optimization and performance improvement of cold-sprayed high-strength metals.