航空材料学报2025，Vol.45Issue(3)：131-141,11.DOI:10.11868/j.issn.1005-5053.2025.000012
激光扫描速度对选区激光熔化成形TA15合金宏观形貌和微观组织的影响
Effect of laser scanning speed on macroscopic morphology and microstructure of TA15 alloy fabricated by selective laser melting
摘要
Abstract
Titanium alloys are widely used in the fields of aviation,aerospace and marine due to their excellent strength,weldability and plasticity.This study focuses on a near-α titanium alloy Ti-6.5Al-2Zr-Mo-V(TA15),fabricated by selective laser melting(SLM)technology.The impact of laser scanning speed on the macroscopic morphology and microstructure of the TA15 alloy is investigated using a range of analytical methods such as confocal laser scanning microscopy(CLSM),optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD)and energy dispersive spectroscopy(EDS).The results show that variations in laser scanning speed significantly influence the forming quality of the alloy.Specifically,higher scanning speeds induce discontinuous fluctuations in the melt pool and irregular surface undulations,whereas lower speeds promote porosity formation at the cross-section.Initially,an increase in laser scanning speed enlarges the size of the martensite structure,followed by a decrease,accompanied by a gradual reduction in martensite hierarchy.Low or high laser scanning speeds cause local cracks on the alloy surface,where elemental depletion and enrichment are observed.These findings demonstrate a direct correlation between laser scanning speed and alloy forming quality.These results provide valuable insights for optimizing the process parameters and strategies of SLM for TA15 alloy,thereby facilitating its further promotion and application.关键词
选区激光熔化/TA15合金/激光扫描速度/微观组织Key words
selective laser melting/TA15 alloy/laser scanning speed/microstructure分类
航空航天引用本文复制引用
雷杨,陈冰清,闫泰起,吴宇,秦仁耀,孙兵兵..激光扫描速度对选区激光熔化成形TA15合金宏观形貌和微观组织的影响[J].航空材料学报,2025,45(3):131-141,11.基金项目
国家重大科技项目(J2022-Ⅶ-0002-0044-0507) （J2022-Ⅶ-0002-0044-0507）
