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首页> 外文期刊>Materials Science and Engineering >Texture and anisotropy in the Al-Mg alloy AA 5005 - Part Ⅰ: Texture evolution during rolling and recrystallization
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Texture and anisotropy in the Al-Mg alloy AA 5005 - Part Ⅰ: Texture evolution during rolling and recrystallization

机译：Al-Mg合金AA 5005的织构和各向异性-第一部分：轧制和再结晶过程中的织构演变

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摘要

Control of the plastic anisotropy during forming of a metallic sheet requires detailed knowledge about its microstructure and, especially, its crystallographic texture. In the present study the correlation of texture and anisotropy is studied in sheets of the Al-Mg alloy AA 5005. A series of different material states with different textures was produced by back-annealing of cold rolled sheet in the H18 state to the fully soft 0 condition and, secondly, by subsequent cold rolling from the soft (O) to the fully hard H19 state. In the present 1st part of this study the evolution of microstructure and texture in AA 5005 is discussed. Back-annealing of rolled sheet was characterized by recovery followed by recrystallization. These softening reactions were simulated with an analytical model named AlSoft, which was able to reproduce the decline in yield strength and the changes in microstructure and texture. Upon subsequent cold rolling the recrystallization texture in the soft material was gradually transformed back into the typical rolling texture orientations. This behaviour, both the sharpening of the rolling texture and the decay of the recrystallization texture from the soft-annealed state, was simulated with the GIA polycrystal-plasticity code. The correlation of the various textures with anisotropic sheet properties, including Young's modulus, yield strength and r-values in uniaxial tensile tests as well as earing upon cup drawing, will be presented in part Ⅱ of this study.
机译：控制金属片成形过程中的塑性各向异性需要详细了解其微观结构，尤其是其晶体学结构。在本研究中，研究了Al-Mg合金AA 5005板材的织构与各向异性的相关性。通过将H18状态的冷轧薄板反向退火至完全软化，可以生产出具有不同织构的一系列不同材料状态0，然后通过从软（O）到完全硬H19状态的冷轧。在本研究的第一部分中，讨论了AA 5005的微观结构和织构的演变。轧制板的反向退火的特征在于恢复，然后重结晶。使用名为AlSoft的分析模型对这些软化反应进行了模拟，该模型能够重现屈服强度的下降以及微观结构和织构的变化。随后进行冷轧后，软质材料中的重结晶织构逐渐转变回典型的轧制织构取向。使用GIA多晶可塑性代码模拟了这种行为，包括轧制纹理的锐化和再结晶纹理从软退火状态的衰减。本研究的第二部分将介绍各种纹理与各向异性片材性能的相关性，包括单轴拉伸试验中的杨氏模量，屈服强度和r值，以及拔模时的耳垂。

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