铋粒子相在大变形过程中对晶粒细化的影响（英文）

发布时间：2018-04-14 06:33

  本文选题：铝合金 + 等径角挤压　； 参考：《Transactions of Nonferrous Metals Society of China》2017年05期

【摘要】：通过背散射电子衍射(EBSD)研究Al-8Zn和Al-6Bi-8Zn两种合金经5道次室温等径角挤压(ECAP)过程中的组织演变和晶粒细化行为。经过5道次等径角挤压,两种合金都形成了超细晶粒。然而,Al-6Bi-8Zn合金的晶粒明显小于Al-8Zn合金,这说明在等径角挤压过程中铋粒子对晶粒细化有明显的作用。通过测定等径角挤压后两种合金的硬度发现,经5道次等径角挤压之后,Al-6Bi-8Zn合金的硬度高于Al-8Zn合金。此外,讨论了铋粒子在等径角挤压过程中对变形行为及最终合金强度的影响。
[Abstract]:The microstructure evolution and grain refinement behavior of Al-8Zn and Al-6Bi-8Zn alloys during 5 pass room temperature equal angle extrusion (ECAP) were studied by means of backscatter electron diffraction (EBSD).After 5-pass secondary equal-diameter angular extrusion, ultrafine grains were formed in both alloys.However, the grain size of Al-6Bi-8Zn alloy is obviously smaller than that of Al-8Zn alloy, which indicates that bismuth particles play an important role in grain refinement during equal path angular extrusion.By measuring the hardness of the two alloys after equal angular extrusion, it is found that the hardness of Al-6Bi-8Zn alloy is higher than that of Al-8Zn alloy after 5-pass secondary angular extrusion.In addition, the effect of bismuth particles on the deformation behavior and ultimate strength of the alloy during isometric angular extrusion was discussed.
【作者单位】： Department
【基金】：Project(10407002)supported by Research Council of Norway Project(201406080011)supported by China Scholarship Council
【分类号】：TG379
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本文编号：1748146