Significance of temperature increase in processing by high-pressure torsion

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:528

Article

Edalati, Kaveh^1,2  Miresmaeili, Reza³  Horita, Zenji^1,2  Kanayama, Hiroshi⁴  Pippan, Reinhard⁵ 

[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan

[2] Kyushu Univ, I2CNER, WPI, Fukuoka 8190395, Japan

[3] Kyushu Univ, Int Res Ctr Hydrogen Energy, Fukuoka 8190395, Japan

[4] Kyushu Univ, Fac Engn, Dept Mech Engn, Fukuoka 8190395, Japan

[5] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Christian Doppler Lab, A-8700 Leoben, Austria

关键词: High-pressure torsion;    Severe plastic deformation;    Ultrafine-grained microstructure;    Numerical computation;    Temperature;   

DOI  :  10.1016/j.msea.2011.06.031

来源: Elsevier

【 摘 要 】

Experiments and finite element simulations were conducted to measure the temperature increase in processing disc samples by high-pressure torsion. Aluminum, copper, iron and molybdenum were selected as model materials. The temperature increases at the early stages of straining but saturates to steady-state levels at large strains. The increase of temperature is proportional to the hardness and rotation speed and is higher at higher imposed pressures and is somewhat higher at larger distances from the disc center. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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