Volume 17, Issue 4 (2017)                   Modares Mechanical Engineering 2017, 17(4): 52-60 | Back to browse issues page

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Eftekhari M, Faraji G, Shapoorgan O, Baniassadi M. Experimental investigation of the effect of temperature in extrusion process of ECAPed nanostructured Titanium. Modares Mechanical Engineering. 2017; 17 (4) :52-60
URL: http://journals.modares.ac.ir/article-15-8090-en.html
Abstract:   (1581 Views)
Todays, numerous researchers have focused on proposing severe plastic deformation (SPD) methods due to the superior mechanical and physical properties of achieved ultra-fine grain material. In all SPD methods a large strain is implied without any substantial dimensional change of work piece to generate UFG and even nanograin (NG) materials. Equal Channel Angular Pressing (ECAP) is one of the most successful techniques for industrial applications. Using long and thin rod is limited in ECAP process. In the present study, a combined process composed of ECAP and Extrusion processes is used on Titanium of grade 2. Titanium is extensively used in aviation and other industries because of high strength to weight value. Using combined process leads to produce high length and thin nanostructured rod. The main goal of this process is evaluation of the temperature in Extrusion process on nanostructures Titanium rods. At first, Titanium rods were processed to 4 passes by ECAP process at 400°C Then they were processed by Extrusion process in 5 different temperatures included 300, 350, 400, 450 and 500°C. The result showed that the best mechanical properties were achieved for the specimen was extruded at 300°C. Strength and hardness were severely improved. Also, the microstructure was really homogenous and refine. The mechanical properties of titanium grade 2 after combined process were equivalent to titanium grade 5 which is used in medical applications and it is expensive.
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Article Type: Research Article | Subject: Metal Forming
Received: 2017/01/27 | Accepted: 2017/02/14 | Published: 2017/04/3

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