本文選題：鋁合金 + 等徑角擠壓��； 參考：《Transactions of Nonferrous Metals Society of China》2017年05期

【摘要】：通過(guò)背散射電子衍射(EBSD)研究Al-8Zn和Al-6Bi-8Zn兩種合金經(jīng)5道次室溫等徑角擠壓(ECAP)過(guò)程中的組織演變和晶粒細(xì)化行為。經(jīng)過(guò)5道次等徑角擠壓,兩種合金都形成了超細(xì)晶粒。然而,Al-6Bi-8Zn合金的晶粒明顯小于Al-8Zn合金,這說(shuō)明在等徑角擠壓過(guò)程中鉍粒子對(duì)晶粒細(xì)化有明顯的作用。通過(guò)測(cè)定等徑角擠壓后兩種合金的硬度發(fā)現(xiàn),經(jīng)5道次等徑角擠壓之后,Al-6Bi-8Zn合金的硬度高于Al-8Zn合金。此外,討論了鉍粒子在等徑角擠壓過(guò)程中對(duì)變形行為及最終合金強(qiáng)度的影響。
[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.
【作者單位】： Department
【基金】：Project(10407002)supported by Research Council of Norway Project(201406080011)supported by China Scholarship Council
【分類(lèi)號(hào)】：TG379
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本文編號(hào)：1748146