Processing and characterization of nanostructured Grade 2 Ti processed by combination of warm isothermal ECAP and extrusion

被引：32

作者：

Eftekhari, M. ^{[1
]}

Faraji, G. ^{[1
]}

Nikbakht, S. ^{[1
]}

Rashed, R. ^{[1
]}

Sharifzadeh, R. ^{[1
]}

Hildyard, R. ^{[2
]}

Mohammadpour, M. ^{[2
]}

机构：

[1] Univ Tehran, Sch Mech Engn, Coll Engn, Tehran 111554563, Iran

[2] Loughborough Univ Technol, Wolfson Sch Mech Elect & Mfg Engn, Loughborough, Leics, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 703卷

基金：

美国国家科学基金会;

关键词：

Warm ECAP; Warm extrusion; Pure Ti; Mechanical properties; SEM; TEM; COMMERCIAL-PURITY TITANIUM; SEVERE PLASTIC-DEFORMATION; CHANNEL ANGULAR EXTRUSION; PURE TITANIUM; ROOM-TEMPERATURE; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; HYDROSTATIC EXTRUSION; COLD-EXTRUSION; MULTIPASS ECAP;

D O I：

10.1016/j.msea.2017.07.088

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, combined multi pass equal channel angular pressing (ECAP), and subsequent warm extrusion at different temperatures are performed on commercial purity titanium. Mechanical and microstructural evolutions are then investigated. Since it was observed that the four passes ECAP processed sample showed the best strength and reasonable elongation, this sample was selected for studying the extrusion temperature effects on the structure and mechanical properties of Grade 2 titanium. Therefore, the 4th passes ECAP processed sample was extruded at different temperatures of 300 degrees C, 350 degrees C, 400 degrees C, 450 degrees C and 500 degrees C. The result revealed that the best mechanical properties were achieved from the specimen processed by four passes ECAP followed by warm extrusion at 300 degrees C. The strength, and hardness of this sample were considerably improved in comparison with that of the unprocessed sample. Also, its ultra-fine grained and nanograined microstructure were homogeneous, with a grain size ranged from 40 to 200 nm with an average grain size of about 123 nm. It was seen that the mechanical properties of some samples after applying this combined process (ECAP + warm extrusion) are comparable with those of Grade 5 titanium which is commonly used in medical applications but contains alloying elements that are toxic to human health.

引用

页码：551 / 558

页数：8

共 36 条

[1] Quantitative analysis of grain refinement in titanium during equal channel angular pressing [J].

Chen, Y. J. ;

Li, Y. J. ;

Walmsley, J. C. ;

Dumoulin, S. ;

Gireesh, S. S. ;

Armada, S. ;

Skaret, P. C. ;

Roven, H. J. .

SCRIPTA MATERIALIA, 2011, 64 (09) :904-907

[2] Effect of initial microstructure on the processing of titanium using equal channel angular pressing [J].

Dheda, Shehreen S. ;

Mohamed, Farghalli A. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (28) :8179-8186

[3]

Elias CN., 2013, J MATER RES TECHNOL, V2, P340, DOI [10.1016/j.jmrt.2013.07.003, DOI 10.1016/J.JMRT.2013.07.003]

[4] Cyclic extrusion compression angular pressing (CECAP) as a novel severe plastic deformation method for producing bulk ultrafine grained metals [J].

Ensafi, Mahnaz ;

Faraji, Ghader ;

Abdolvand, Hooman .

MATERIALS LETTERS, 2017, 197 :12-16

[5] A new designed incremental high pressure torsion process for producing long nanostructured rod samples [J].

Eskandarzade, Mehdi ;

Masoumi, Abolfazl ;

Faraji, Ghader ;

Mohammadpour, Mahdi ;

Yan, Xinjie Sabrina .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 695 :1539-1546

[6] Review of principles and methods of severe plastic deformation for producing ultrafine-grained tubes [J].

Faraji, G. ;

Kim, H. S. .

MATERIALS SCIENCE AND TECHNOLOGY, 2017, 33 (08) :905-923

[7] An Investigation of mechanical properties in accumulative roll bonded nano-grained pure titanium [J].

Fattah-alhosseini, Arash ;

Ansari, Ali Reza ;

Mazaheri, Yousef ;

Karimi, Mohsen ;

Haghshenas, Meysam .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 688 :218-224

[8] Evolution of microstructure, macrotexture and mechanical properties of commercially pure Ti during ECAP-conform processing and drawing [J].

Gunderov, D. V. ;

Polyakov, A. V. ;

Semenova, I. P. ;

Raab, G. I. ;

Churakova, A. A. ;

Gimaltdinova, E. I. ;

Sabirov, I. ;

Segurado, J. ;

Sitdikov, V. D. ;

Alexandrov, I. V. ;

Enikeev, N. A. ;

Valiev, R. Z. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 562 :128-136

[9] Ultra-fine grained bulk CP-Ti processed by multi-pass ECAP a warm deformation region [J].

Hajizadeh, K. ;

Eghbali, B. ;

Topolski, K. ;

Kurzydlowski, K. J. .

MATERIALS CHEMISTRY AND PHYSICS, 2014, 143 (03) :1032-1038

[10] Thermal stability and annealing behaviour of ultrafine grained commercially pure titanium [J].

Hoseini, Majid ;

Pourian, Meysam Hamid ;

Bridier, Florent ;

Vali, Hojatollah ;

Szpunar, Jerzy A. ;

Bocher, Philippe .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 532 :58-63

← 1 2 3 4 →