Effect of strain rate on deformation texture in OFHC copper
نویسندگان
چکیده
A strong strain rate dependence on the crystallographic texture of oxygen-free high conductivity copper is observed and reported for the first time. Two shear compression specimens were deformed at widely different strain rates (0.001 s 1 and 7000 s ) to the same strain, and their textures were determined using orientation image microscopy. By comparing the stress–strain curves and the major texture components at the two strain rate levels, it is realized that increase in strain rate causes increase in strain hardening which thereby influences the texture. 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
منابع مشابه
New Dynamic Constitutive Model for OFHC Copper Film
The material properties of OFHC copper film was investigated with the High-Speed Material Micro Testing Machine (HSMMTM) at the high strain rates. The rate-dependent stress-strain curves from the experiment and the Johnson−Cook curve fitting showed large discrepancies as the plastic strain increases since the constitutive model implies no rate-dependent strain hardening effect. A new constituti...
متن کاملFinite Element Modeling of Strain Rate and Grain Size Dependency in Nanocrystalline Materials
Nanocrystalline materials show a higher strain-rate sensitivity in contrast to the conventional coarse-grained materials and a different grain size dependency. To explain these phenomenon, a finite element model is constructed that considers both grain interior and grain boundary deformation of nanocrystalline materials. The model consist of several crystalline cores with different orientations...
متن کاملA constitutive model for fcc crystals with application to polycrystalline OFHC copper
Based on the results of a series of experiments on commercially pure OFHC copper (an fcc polycrystal), a physically based, rateand temperature-dependent constitutive model is proposed for fcc single crystals. Using this constitutive model and the Taylor averaging method, numerical calculations are performed to simulate the experimental results for polycrystalline OFHC copper. The model calculat...
متن کاملGrain Size Effect on the Hot Deformation Processing Map of AISI 304 Austenitic Stainless Steel
In this study, the hot deformation processing map of AISI 304 austenitic stainless steel in two initial grain sizes of 15 and 40 μm was investigated. For this purpose, cylindrical samples were used in the hot compression test at the temperature range of 950-1100 °C and the strain rate of 0.005-0.5% s-1. At first, the relationship between the peak stress and Zener-Hollomon parameter w...
متن کاملStrain Rate Effect on the Evolution of Deformation Texture for -Fe
The effect of strain rate on the deformation texture of alpha-iron ( -Fe) is studied at different strain levels during the deformation. Two shear compression specimens (SCS) were deformed in three consecutive stages at room temperature, one at 10 /s and the other at 10 /s, to the same strain level. The crystallographic textures were determined using electron backscattered diffraction. The textu...
متن کامل