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ABSTRACT
This study aims at investigating the process capability of a 3D printer for the fabrication of porous bone scaffolds. Initially, a suitable material is identified by optimising process parameters of a 3D printer using a full factorial design approach. Then, dimensional deviation and tolerance grades of the scaffold samples are calculated. Finally, process capability indices are evaluated and the process is recentred. Out of two materials under study, VisiJet PXL Core powder is found to provide better dimensional accuracy. Tolerance grades of the samples are found to be ranged from IT3 to IT10. Maximum dimensional deviation before and after centring the process is found to be 0.47% and 0.44%, respectively. Process capability indices Cp and Cpk are greater than 1 and close to industry benchmark (Cpk ≥1.33). This indicates the process is under statistical control and capable of fabricating porous bone scaffolds suitable for in vitro or in vivo bone tissue engineering applications.
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Notes on contributors
Yashwant Kumar Modi
Dr. Yashwant Kumar Modi is Assistant Professor in the Department of Mechanical Engineering, Jaypee University of Engineering and Technology, Guna, MP, India. He is the principal and sole Investigator in research project sponsored by Madhya Pradesh Council of Science and Technology, Bhopal, MP, India.
Kiran Kumar Sahu
Mr. Kiran Kumar Sahu is Research Scholar in the Department of Mechanical Engineering, Jaypee University of Engineering and Technology, Guna, MP, India.