UTILIZATION OF MULTI DIRECTIONAL FORGING FOR FABRICATION OF ULTRAFINE-GRAINED PURE TITANIUM

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ANSARIAN IMAN; SHAERI MOHAMMAD HOSSEIN; EBRAHIMI MAHMOUD

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Journal: Modares Mechanical Engineering Year:2018 | Volume:18 | Issue:2 Page(s): 371-382

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Title

UTILIZATION OF MULTI DIRECTIONAL FORGING FOR FABRICATION OF ULTRAFINE-GRAINED PURE TITANIUM

Author(s)

ANSARIAN IMAN | SHAERI MOHAMMAD HOSSEIN | EBRAHIMI MAHMOUD | Issue Writer Certificate

Keywords

MULTI DIRECTIONAL FORGINGQ1

COMMERCIAL PURE TITANIUMQ1

FINITE ELEMENT ANALYSISQ2

MECHANICAL PROPERTIESQ1

MICROSTRUCTURE ANALYSISQ1

Abstract

Commercial pure (CP) titanium has many biomedical applications, especially in implants due to its excellent biocompatibility. The major weakness of CP titanium is its low strength compared to the other titanium alloys. One of the methods which can be utilized for enhancement of CP titanium strength is severe plastic deformation methods. Therefore, the aim of this research is to improve the strength of CP titanium by grain refinement through MULTI DIRECTIONAL FORGING (MDF). For this purpose, after one hour annealing at 800oC, the CP titanium was forged by MDF process up to six passes at ambient temperature. Microstructural analysis was performed by optical microscope and scanning electron microscope equipped with EBSD. MECHANICAL PROPERTIES were also studied by Vickers micro hardness and tensile tests. The finite element simulation was also applied to predict the strain distribution during MDF process. The results of microstructural analysis showed that the average grain size decreased significantly after the MDF process and increasing pass numbers led to the refinement of grain size. After six passes of the MDF process, the average grain size decreased from 45 micrometers to 390 nm. MECHANICAL PROPERTIES results showed that the strength and hardness of specimens were enhanced with MDF process and increasing the number of passes. The hardness and strength of six passes MDFed specimen was about 2 times greater than those of the annealed one. The strain distribution results obtained from the simulation showed good agreement with experimental results of microhardness distribution.

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APA: Copy

ANSARIAN, IMAN, SHAERI, MOHAMMAD HOSSEIN, & EBRAHIMI, MAHMOUD. (2018). UTILIZATION OF MULTI DIRECTIONAL FORGING FOR FABRICATION OF ULTRAFINE-GRAINED PURE TITANIUM. MODARES MECHANICAL ENGINEERING, 18(2 ), 371-382. SID. https://sid.ir/paper/178691/en

Vancouver: Copy

ANSARIAN IMAN, SHAERI MOHAMMAD HOSSEIN, EBRAHIMI MAHMOUD. UTILIZATION OF MULTI DIRECTIONAL FORGING FOR FABRICATION OF ULTRAFINE-GRAINED PURE TITANIUM. MODARES MECHANICAL ENGINEERING[Internet]. 2018;18(2 ):371-382. Available from: https://sid.ir/paper/178691/en

IEEE: Copy

IMAN ANSARIAN, MOHAMMAD HOSSEIN SHAERI, and MAHMOUD EBRAHIMI, “UTILIZATION OF MULTI DIRECTIONAL FORGING FOR FABRICATION OF ULTRAFINE-GRAINED PURE TITANIUM,” MODARES MECHANICAL ENGINEERING, vol. 18, no. 2 , pp. 371–382, 2018, [Online]. Available: https://sid.ir/paper/178691/en

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