Effect of the Sintering Conditions on the Neck Growth during the Powder Bed Fusion with Electron Beam (PBF-EB) Process

被引:3
作者
Rizza, Giovanni [1 ]
Galati, Manuela [1 ]
Antonioni, Paolo [1 ]
Iuliano, Luca [1 ]
机构
[1] Politecn Torino, Integrated Addit Mfg Ctr IAMPoliTo, Dept Management & Prod Engn DIGEP, Corso Duca Abruzzi 24, I-10129 Turin, Italy
来源
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING | 2023年 / 7卷 / 02期
关键词
electron beam powder bed fusion; rigid body motion; sintering; preheating; neck radius; neck growth; additive manufacturing; Ti6Al4V; PHASE FIELD MODEL; MICROSTRUCTURE; MECHANISMS; TITANIUM; TUNGSTEN;
D O I
10.3390/jmmp7020055
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A distinctive characteristic of the powder bed fusion with electron beam (PBF-EB) process is the sintering of the powder particles. For certain metallic materials, this is crucial for the success of the subsequent step, the melting, and, generally, the whole process. Despite the sintering mechanisms that occur during the PBF-EB process being similar to well-known powder metallurgy, the neck growth rates are significantly different. Therefore, specific analyses are needed to understand the influence of the PBF-EB process conditions on neck growth and neck growth rate. Additionally, some aspects, such as the rigid body motion of the particles during the sintering process, are still challenging to analyze. This work systematically investigated the effects of different particle diameters and particle diameter ratios. Additionally, the impact of the rigid body motion of the particles in the sintering was analyzed. This work demonstrated that the sintering results significantly depended on the EB-PBF process conditions.
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页数:14
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