Effect of the process parameters on deposition quality of Ti6Al4V titanium alloy by powder-feed underwater laser metal deposition

IF 2.5 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Welding in the World Pub Date : 2025-09-05 DOI:10.1007/s40194-025-02160-w

Xiaofeng Wan, Jiaqi Li, Jinchao Zhang, Tuo Shi, Qingqing Zhu, Mingfu Shu, Yuhang Sun, Qingsong Ding

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Abstract

The powder-feed underwater laser metal deposition (ULMD) of Ti6Al4V alloy was carried out in a local dry cavity generated by a special drainage nozzle, and the influence of laser power and scanning speed on the deposition appearance and geometry characteristics of a single track was investigated. The results show that as the laser power increases, the aspect ratio and dilution rate increase. With the scanning speed increasing, the aspect ratio increases, but the dilution rate and the deposition angle decrease. A high-quality ULMD single track with a uniform appearance and no metallurgical defects is obtained at the laser power of 2.2 kW and scanning speed of 14 mm/s. In addition, a thin wall part was fabricated using the optimal process parameters. The microstructure of the deposited metal is composed of acicular martensitic α′ phase, and the sizes of the martensitic in the top region are finer than those of the martensitic in the middle region and bottom region.

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粉末进料水下激光金属沉积工艺参数对Ti6Al4V钛合金沉积质量的影响

在专用引流喷嘴形成的局部干腔中进行了Ti6Al4V合金的粉末喂料水下激光金属沉积（ULMD），研究了激光功率和扫描速度对沉积形貌和单轨迹几何特性的影响。结果表明，随着激光功率的增大，长宽比和稀释率增大。随着扫描速度的增加，宽高比增大，稀释率和沉积角减小。在激光功率为2.2 kW、扫描速度为14 mm/s的条件下，获得了外观均匀、无冶金缺陷的高质量ULMD单轨。利用优化后的工艺参数制备了薄壁件。沉积金属的显微组织由针状马氏体α′相组成，顶部马氏体的尺寸小于中部和底部马氏体的尺寸。

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来源期刊

Welding in the World METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

4.20

自引率

14.30%

发文量

181

审稿时长

6-12 weeks

期刊介绍： The journal Welding in the World publishes authoritative papers on every aspect of materials joining, including welding, brazing, soldering, cutting, thermal spraying and allied joining and fabrication techniques.