Technology
Tech Breakthrough
XAUAT Develops High-Strength 7075 Aluminum Alloy Using Laser-Assisted Cold Spray
2026-05-23
A joint research team from Xi'an University of Architecture and Technology (XAUAT) fabricated an Al-Zn-Mg-Cu/Al₂O₃ composite deposit using laser-assisted cold spray (LACS) solid-state additive technology, achieving ultra-high density and bimodal grain structure. After non-isothermal annealing at 270°C, the ultimate tensile strength reached 485 MPa and microhardness 170 HV, with simultaneous improvements in strength and ductility; among strengthening mechanisms, precipitation strengthening contributed 32%. This study employs LACS, a solid-state additive manufacturing technique, to avoid hot cracking and elemental segregation common in melt-based manufacturing, offering a new paradigm for developing heat-sensitive high-strength aluminum alloys and potentially solving hot cracking challenges in traditional fusion-based additive manufacturing.
📰 News Source
This article was translated from a Chinese source.
Source URL not available
Show Chinese original
西建大利用激光辅助冷喷涂制备高强7075铝合金
西安建筑科技大学联合研究团队通过激光辅助冷喷涂（LACS）固态增材技术制备Al-Zn-Mg-Cu/Al₂O₃复合沉积体，获得超高致密度与双峰晶粒结构。经过270℃非等温退火后，极限抗拉强度达485 MPa，微硬度170 HV，强度与延展性同步提升；强化机制中，沉淀强化贡献占32%。该研究采用激光辅助冷喷涂这一固态增材制造技术，避免了熔基制造中常见的热裂纹和元素偏析问题，为热敏高强铝合金的开发提供了全新范式，有望解决高强铝合金在传统熔化增材中的热裂难题。