PSI - Issue 53

Carla M. Ferreira et al. / Procedia Structural Integrity 53 (2024) 254–263 Carla M. Ferreira / Structural Integrity Procedia 00 (2019) 000 – 000

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surface quality and heat treatment are also keywords that this cluster accommodates. This type of research is mostly related with aluminium alloys and scalmalloy, Ti6Al4V and Inconel 718. The green cluster is more related with numerical simulation, machine learning, design for AM (DfAM), topology optimization (TO), finite element analysis (FEA), X-ray tomography and some traces of investigation regarding the porosity of metals and the application of the hot isostatic pressing (HIP) technique. This cluster is more related with aluminium allows such as the AlSi10Mg, AlSi7Mg and scalmalloy ones. Finally, the blue cluster covers topics like fatigue and fracture, fractography analysis, crack growth, residual stresses, and a particularly interesting topic in the aeronautical industry which the certification one. Titanium alloys, Invar 36 and AlSi12 have been more addressed to these scientific research fields. This information can be related to the one shown in Fig. 6 (b), in which is shown the average number of citations received by a document containing a certain keyword. The warmer the color, i.e. yellow, the more citations have been received by a document in which a certain author keyword appears. For instance, the AK ‘microstructure’ is represented by a large node meaning that is a largely studied subject and it is represent by a light green with means that in average documents containing the ‘microstructure’ keyword are also well cited by the scientific community. On the other hand, documents containing the AK ‘certification’ have been highly cited even though very few articles addressing this keyword are presently published, meaning that topics like this one should be further investigated. It can also be concluded that the AlSi10Mg alloy is currently the most used (due to the size of its node) and cited (regarding its color) material. From Fig. 6 one can conclude that the red cluster associated with mechanical properties and microstructure is already widely studied while the green and blue clusters are lacking further investigation, for instance on the numerical simulation, fracture, DfAM, FEA, and fractography topics.

(a)

(b)

Maraging steel Fracture

Maraging steel Fracture

Certification

Certification

Mechanical properties Al Alloys

Mechanical properties Al Alloys

Fig. 6. (a) Author keywords network showing three major clusters of research, where the size of each node is related with the number of documents in which a certain keyword appears. (b) Author keywords network where the color coding of each node is associated with the average number of citations received by the documents in which a certain keyword occurs. 4. Conclusions and further studies The present paper provides a bibliometric analysis regarding the use of metals processed by L-PBF in the aeronautical sector. The research objectives were defined, and an appropriate research string was developed to retrieve a collection of documents from Scopus database. The open sources bibliometrix and VOSviewer softwares were used to analyze the documentation. From the bibliometric analysis it was concluded that USA largely surpasses the research content production in the aeronautical field, followed by China and Germany. UK and Singapore present the highest average citation per documents. The Materials and Science and Engineering: A , Materials and the International Journal of Advanced Manufacturing Technology journals are the leading sources of publication of AM/L-PBF research in this field. Selective Laser Melting is identified as the most used AM/L-PBF process in the aeronautical sector and