Online ISSN: 2515-8260

Keywords : mechanical properties

Analysis of Tensile and Compression Strength on Magnesium Hydroxyapatite Composite for Biomedical Implants

Rejikumar Rajamoni; Sivapragash M; Sivakumar G; Sivaraj M; S Rajkumar

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 10, Pages 75-83

This paper focuses on the biomedical implants of bone plates with biodegradable Magnesium composites. ZK30 Mgalloy metal matrix reinforced with five weight fractions ofHydroxyapatite (HAP), have been fabricated using powder metallurgy manufacturing process followed by hot extrusion process. Properties such as Tensile and compression tests were investigated. Scanning Electron Microscopy (SEM) techniques were used for surface fracture analysis. The results obtained shows that the maximum ultimate tensile strength was attained at ZK30 Mg alloy while the least was noted for ZK30/10wt%HAP. In addition, ZK30/2wt%HAP shows a higher ultimate compressive strength. The SEM images of tensile specimen displays ductile fracture for ZK30 Mg alloy and quasi cleavage fracture for Mg composite whereas the compressive specimen indicates ductile fracture for ZK30 Mg alloy and Mg composites. The composite exhibited excellent mechanical properties thereby it can be used for biomedical implants of Bone plates.

A Review on surface enhancement approaches for thermoplastics developed through Fused Deposition Modeling

Vinay Shah; Raman Kumar; Jasgurpreet Singh Chohan

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 4485-4497

As the Demand of low cost, tailor-made products are increasing in the contemporary
industries, the research and development of different material processing techniques has
been intensified. Fused deposition modeling (FDM) is most successful and popular
additive manufacturing technique which used thermoplastic polymers as raw materials.
This paper aims to study and analyze the fundamental working process, applications,
limitations and challenges for FDM technology in present and future. Poor surface finish,
which is one of intrinsic defect of this technology, has been considered as major barrier
against implementation in critical application areas. Various chemical, mechanical and
pre-processing techniques are elaborated along with detailed literature review. The impact
of finishing operations in materials properties and overall cost of product has also been
discussed in detail. The study also discussed the current and future challenges along with
remedies which would help this technology to sustain in competitive environment