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Corresponding Author
Ridwan Afandi

Institutions
Politeknik Manufaktur Ceper

Abstract
Magnesium and its alloy are known as biodegradable materials. Application of these materials especially as an implant materials such as fracture fixation, cardiovascular stent and musculoskeletal. Characteristic modifications of these materials have been extensively done by some treatments. The objective of this paper is to review some treatments of the magnesium and its alloy to increase their characteristic as a biomaterial. In this paper, the treatment of magnesium and its alloy by coating, surface mechanical attrition treatment (SMAT), shot peening and thermal oxidation was reviewed. Some properties were studied base on these treatments such as corrosion resistant, morphology, wettability, and biocompatibility. Coating treatment by calcium phosphate was developed for orthopedic application. SMAT resulted in grain size of nanometer in the topmost surface of magnesium. Surface roughness and wettability also increased on the SMATed specimen but its corrosion resistant decreased. Severe shot peening on magnesium for orthopedic application should be studied intensively. Thermal oxidation of magnesium alloy improved both wear and corrosion resistant.

Keywords
magnesium, thermal oxidation, coating, shot peening, surface mechanical attrition treatment

Topic
Biomedical

Link: https://ifory.id/abstract/kK2fGFuQMZxD

Corresponding Author
paulus wisnu Anggoro

Institutions
Department of Industrial Engineering
Faculty of Industrial Technology
University of Atma Jaya Yogyakarta
Jl. Babarsari 44, Yogyakarta 55281, Indonesia.

Department of Mechanical Engineering,
Diponegoro University
Jl. Prof. Soedarto, SH., Tembalang, Semarang 50275, Indonesia.

Abstract
Reverse innovative design (RID) of insole shoe orthotics for patients with diabetes and the manufacturing strategy in optimizing the production time of the insole were examined in the present work. The plantar surface of the feet from two female patients was scanned using a 3D scanner yielding a 3D mesh foot for each patient resulting in an STL file format. The geometric shapes of the 3D models of the feet were fitted very well using curve based surface modeling (CBS-modeling) for insole orthotics design and integrated with CAM (computer-aided manufacturing). Optimization of the manufacturing time was simulated in CNC milling with the Taguchi approach. The manufacture of the optimal insole design was achieved at the optimum machining parameters such as tool path strategy with raster machining, spindle speed of 15000 rpm, feed rate of 900 mm/minutes, and step over about 0.30 mm. The optimal design of the orthotic insole has the geometric tolerance of 0.75 mm for patient 1 and 1.50 mm for patient 2. The optimal machining time for the insole of patient 1 is 227.48 minutes and 241.65 minutes for patient 2. These valuable data are needed for the real manufacturing process in CNC milling

Keywords
CNC milling; Insole shoe orthotics; RID; CBS-modeling; Taguchi methods

Topic
Biomedical

Link: https://ifory.id/abstract/CvJkfUHB72Px