Rubber pad-constrained groove pressing process: Experimental and finite element investigation

被引:29
作者
Borhani, M. [1 ]
Djavanroodi, F. [1 ]
机构
[1] Iran Univ Sci & Technol, Sch Mech Engn, Tehran, Iran
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 546卷
关键词
Severe plastic deformation; Constrained groove pressing; Ultrafine-grained material; Plastic strain distribution; SEVERE PLASTIC-DEFORMATION; GRAIN-REFINEMENT; NANOSTRUCTURED MATERIALS; MECHANICAL-PROPERTIES; COPPER SHEET; ALUMINUM; MICROSTRUCTURE;
D O I
10.1016/j.msea.2012.02.089
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A new severe plastic deformation (SPD) process named rubber pad-constrained groove pressing (RP-CGP) has been developed for producing ultrafine-grained metallic materials. In this process, repetitive shear deformation conditions are imposed on the sheet material by utilizing asymmetrically grooved die and a polyurethane rubber pad instead of the rigid top die, as in the CGP, through alternate pressing. In this study, commercial pure aluminum sheet was subjected to repetitive deformation using RP-CGP. The process was carried out in two conditions utilizing two dies with different groove angles. Changes in mechanical properties measured by tensile and hardness tests is investigated. Tensile tests show a significant enhancement in mechanical properties including hardness, yield strength and ultimate tensile strength, but the ductility of the alloy reduced by employing this process. The influence of die groove angle on strain distribution throughout the transverse cross-section of specimen was analyzed by the finite element method in 20 plain strain condition using the commercial finite element code ABAQUS. It is shown that a die with a larger groove angle can result in better grain refinement and mechanical properties but cause a less uniform plastic strain distribution throughout the specimen. (C) 2012 Elsevier B.V. All rights reserved.
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页码:1 / 7
页数:7
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