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Relationship among grain size, texture and mechanical properties of aluminums with different particle distributions

机译：不同颗粒分布的铝的晶粒尺寸，织构与力学性能之间的关系

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摘要

Relationship among grain size, texture and mechanical properties of aluminums with different particle distributions was investigated systematically by microstructure characterization, texture measurement and tensile test in the present study. The results reveal that there is a close relationship among grain size, texture and mechanical properties. For high-purity aluminum without particle, it is easy to result in the increase of grain size. As grain size increases, the initial texture Cube {001} 100 could become strong at first, and then transforms to other stronger texture components {011} 133 and {013} 293 . Furthermore, the strengths and elongation decrease due to the coarse grain structure, the plastic strain ratio r decreases and planar anisotropy Delta r (absolute value) increases. For Al-Mg-Si-Cu alloy with a large number of particles, it is difficult to make the grains grow. With increasing grain size, the texture consisting of CubeND {001} 310 , Goss {110} 001 and P {011} 122 orientations is slightly enhanced at first, and then transforms to another texture including Cubean {310} 001 and H {001} 110 orientations with a slight change in volume fraction. In addition, the strengths increase at first, and then remain constant, whereas elongation, r and Delta r values are almost kept unchanged. In comparison with high-purity aluminum, Al-Mg-Si-Cu alloy possesses the higher r and lower Delta r values. In general, grain size plays an important role in texture development, not depending on whether the aluminum has particles, but particles could retard the texture transformation. Finally, variation of texture with grain size is explained by recrystallization progress.
机译：通过微观结构表征，织构测量和拉伸试验，系统地研究了不同粒径分布的铝的晶粒尺寸，织构与力学性能之间的关系。结果表明，晶粒尺寸，织构和机械性能之间存在密切关系。对于没有颗粒的高纯度铝，很容易导致晶粒尺寸的增加。随着晶粒尺寸的增加，初始纹理立方体{001} <100>首先会变坚固，然后转换为其他更强的纹理成分{011} <133>和{013} <293>。此外，由于粗大的晶粒结构，强度和伸长率降低，塑性应变比r降低，并且平面各向异性Δr（绝对值）增加。对于具有大量颗粒的Al-Mg-Si-Cu合金，难以使晶粒生长。随着晶粒尺寸的增加，首先稍微增强了由立方体{001} <310>，戈斯{110} <001>和P {011} <122>取向组成的纹理，然后转换为包括Cubean {310}的另一个纹理<001>和H {001} <110>方向，体积分数略有变化。另外，强度首先增加，然后保持恒定，而伸长率，r和Delta r值几乎保持不变。与高纯度铝相比，Al-Mg-Si-Cu合金具有更高的r和更低的Delta r值。通常，晶粒尺寸在织构发展中起着重要作用，并不取决于铝是否有颗粒，而是颗粒会阻碍织构的转变。最后，通过重结晶的过程来解释织构随晶粒尺寸的变化。

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