Change of elastic constants of pure iron deformed by cold rolling
Change of elastic constants of pure iron deformed by cold rolling
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DOI：
10.4028/www.scientific.net/msf.426-432.4435
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发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Roca, A
中科院分区：
文献类型：
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作者：
Benito, JA;Jorba, J;Roca, A
测定了多晶纯铁在冷轧过程中弹性常数的变化。压下率为20%时，杨氏模数由214 Gpa降至193 Gpa，连续冷轧至210 Gpa，压下率为60%时，杨氏模数增加。泊松比表现出相同的行为，从0.260到0.231(减少20%)，再到0.264(减少60%)。在这两种情况下，减少和增加的第一步可能不归因于残余应力、显微组织损伤或在冷加工过程中引入的织构。在轧制过程中，残余应力的初始压缩状态基本保持稳定(值在-200到-260兆帕之间)。在检测到伽马纤维偏好的情况下，0%和20%的减少在纹理上没有显著差异；较高的减少程度使增加这种纤维成为可能。
Changes in elastic constants of polycrystalline pure iron with cold rolling are determined. Young's modulus diminishes from 214 GPa to 193 GPa for 20% reduction thickness and increases with successive cold rolling to 210 GPa for 60% reduction. Poisson's ratio shows the same behaviour from 0.260 to 0.231 (20% reduction) and again to 0.264 (60% reduction). In both cases, the diminution and the first step of the increase may not be attributed to residual stresses, microstructural damage nor textures introduced during cold working. The initial compressive state in residual stresses remains practically steady during rolling (with values between -200 and -260 MPa). There was not a significant difference in textures between 0% and 20% reduction in which a preference of gamma fibre was detected; higher degrees of reduction made it possible to increase this fibre.