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Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 ; Page(s) 605 To 611.
 
Paper: 

FABRICATION OF ULTRAFINE-GRAINED MG MICRO TUBES USING A COMBINED SEVERE PLASTIC DEFORMATION PROCESS FOR BIOMEDICAL APPLICATION

 
 
Author(s):  KAZEMI MEHRABADI HOSSEIN, FARAJI GHADER*, AMANI SOHEIL, KARIMPOUR MORAD, GHANBARI HOSEIN
 
* DEPARTMENT OF MECHANICAL ENGINEERING, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

In recent years, Mg alloys have received much attention as a promising candidate for raw materials in the biodegradable vascular stent. Forming of Mg alloys is difficult because of poor workability of them at room temperature. Hence this presents a technological barrier to the fabrication of initial micro-tube for a biodegradable stent. About high biodegradability of the magnesium alloy WE43 to manufacture biodegradable stent, it has been selected as initial with cast structure. In this study, for enhancing mechanical properties and attaining micro tube a combination of equal channel angular pressing (ECAP) with extrusion and micro extrusion was used, and Mg bars were fabricated to high-quality micro-tubes with refined microstructure. Fine-grained billets of the WE43 alloy were obtained by ECAP through one pass. The processed Mg bar was extruded into a bar 5 mm in diameter. Finally, a UFG and high strength microtubes with an outside diameter of 3.4mm and a wall thickness of 0.25mm were successfully produced by a micro extrusion process. Mentioned processes were simulated using finite element (FE) simulations. The result shows the grain size of Mg incredibly reduced after this combined method and mechanical properties were significantly improved.

 
Keyword(s): MICRO-TUBE, STENT, BIODEGRADABLE, EQUAL CHANNEL ANGULAR PRESSING, MICRO-EXTRUSION
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

KAZEMI MEHRABADI, H., & FARAJI, G., & AMANI, S., & KARIMPOUR, M., & GHANBARI, H. (2017). FABRICATION OF ULTRAFINE-GRAINED MG MICRO TUBES USING A COMBINED SEVERE PLASTIC DEFORMATION PROCESS FOR BIOMEDICAL APPLICATION. MODARES MECHANICAL ENGINEERING, 16(12 ), 605-611. https://www.sid.ir/en/journal/ViewPaper.aspx?id=573006



Vancouver: Copy

KAZEMI MEHRABADI HOSSEIN, FARAJI GHADER, AMANI SOHEIL, KARIMPOUR MORAD, GHANBARI HOSEIN. FABRICATION OF ULTRAFINE-GRAINED MG MICRO TUBES USING A COMBINED SEVERE PLASTIC DEFORMATION PROCESS FOR BIOMEDICAL APPLICATION. MODARES MECHANICAL ENGINEERING. 2017 [cited 2021July25];16(12 ):605-611. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=573006



IEEE: Copy

KAZEMI MEHRABADI, H., FARAJI, G., AMANI, S., KARIMPOUR, M., GHANBARI, H., 2017. FABRICATION OF ULTRAFINE-GRAINED MG MICRO TUBES USING A COMBINED SEVERE PLASTIC DEFORMATION PROCESS FOR BIOMEDICAL APPLICATION. MODARES MECHANICAL ENGINEERING, [online] 16(12 ), pp.605-611. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=573006.



 
 
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