Experimental and numerical investigations for mechanical and microstructural characterization of micro-manufactured AZ91D magnesium alloy disks for biomedical applications

Date

2016-03-05

Author

Kayhan, Said Murat
TAHMASEBİFAR, Aydin
KOÇ, Muammer
Usta, Yusuf
Tezcaner, Ayşen
Evis, Zafer

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In this study, the microstructure, mechanical and biological properties of the Mg-based implant samples prepared by the combination of micro-manufacturing and powder metallurgy route were investigated. Porous AZ91D Mg alloy disks with smooth and textured surfaces were manufactured under compaction pressures of 25 and 40 MPa at 150 degrees C and under sintering conditions of 380 degrees C for 30 and 150 min. The phase changes and microstructure were analyzed using X-ray diffraction (XRD), scanning electron (SEM) and light microcopy. The mechanical properties were characterized using diametral tensile and hardness tests. The relative densities were also calculated by their weights and volumes. As compaction pressure increased, relative densities of the disks increased (0.57-0.67%) as well as the diametral tensile strength (2.55-3.01 MPa) and Vickers microhardness values (13.5-84.1 HV2). The validity of relative density measurements was provided by image processing technique and finite element method. It was observed that cells adhered and proliferated more on disks with textured surface of channels than on disks with a smooth surface. Cell culture studies showed that Mg alloy disks were cytocompatible.

Subject Keywords

Powder metallurgy, Microstructural evaluation, Mechanical characterization, Biological properties

URI

https://hdl.handle.net/11511/39330

Journal

MATERIALS & DESIGN

DOI

https://doi.org/10.1016/j.matdes.2015.12.177

Collections

Department of Engineering Sciences, Article

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Citation Formats

S. M. Kayhan, A. TAHMASEBİFAR, M. KOÇ, Y. Usta, A. Tezcaner, and Z. Evis, “Experimental and numerical investigations for mechanical and microstructural characterization of micro-manufactured AZ91D magnesium alloy disks for biomedical applications,” MATERIALS & DESIGN, pp. 397–408, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39330.