Study on Bulk Texture and Mechanical Properties of As-Extruded Wide Mg-Al-Zn Alloy Sheets with Different Al Addition.
Study on Bulk Texture and Mechanical Properties of As-Extruded Wide Mg-Al-Zn Alloy Sheets with Different Al Addition.
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不同Al添加量挤压态宽幅Mg-Al-Zn合金板块体织构及力学性能研究
DOI：
10.3390/ma15124147
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发表时间：
2022-06-10
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影响因子：
--
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中科院分区：
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热挤压生产的宽幅镁合金板材通常容易形成不均匀的织构，导致力学性能各向异性，成形性能较差。然而，对于挤压态镁合金板不同区域的块体织构研究却很少，尤其是不同合金元素的镁合金。本文主要通过中子衍射研究了Al对不同Al含量的三种宽幅Mg-Al-Zn合金板材（Mg-3Al-0.5Zn、Mg-8Al-0.5Zn和Mg-9Al-0.5Zn）不同区域块体织构和力学性能的影响。结果表明，Mg-3Al-0.5Zn 片材中形成了强烈且不均匀的基底织构。同时，随着Al含量的增加，由于Mg17Al12颗粒大量细化析出，基底织构强度明显减弱，阻碍了挤压过程中的晶粒长大，而细小的再结晶晶粒的取向更加随机。 Mg-8Al-0.5Zn 和 Mg-9Al-0.5Zn 合金板材拉伸性能的提高归因于细化的微观结构、析出物和弱化的基底织构的协同作用。在这三种镁合金板材中，Mg-8Al-0.5Zn合金板材的屈服强度约为270 MPa，极限抗拉强度约为330 MPa，挤压方向极限伸长率约为16%，具有最优异的综合力学性能。
The wide Mg alloy sheets produced by hot extrusion usually can easily form an inhomogeneous texture, resulting in anisotropic mechanical properties and poor formability. However, few studies have been carried out on the bulk texture investigation at different areas of as-extruded Mg alloy sheets, especially the Mg alloys with different alloying elements. In this work, the effect of Al on the bulk texture and mechanical properties at different areas for three wide Mg-Al-Zn alloy sheets with different Al contents (Mg-3Al-0.5Zn, Mg-8Al-0.5Zn and Mg-9Al-0.5Zn) are mainly investigated by neutron diffraction. The results showed that a strong and uneven basal texture was formed in the Mg-3Al-0.5Zn sheet. Meanwhile, the intensity of the basal texture was significantly weakened due to the numerous fine precipitates of Mg17Al12 particles, with the Al content increasing, which hinder the grain growth during extrusion, while fine recrystallized grains have a more random orientation. The enhanced tensile properties in Mg-8Al-0.5Zn and Mg-9Al-0.5Zn alloy sheets are ascribed to the cooperation effect of a refined microstructure, precipitates and weakened basal texture. Among the three Mg alloy sheets, the Mg-8Al-0.5Zn alloy sheet has a yield strength of about 270 MPa, an ultimate tensile strength of about 330 MPa and ultimate elongation of about 16% in the extrusion direction, which possesses the most excellent comprehensive mechanical properties.
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影响因子：
9.4
作者：
Li, J. H.;Barrirero, J.;Schumacher, P.
通讯作者：
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影响因子：
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作者：
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影响因子：
6.2
作者：
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通讯作者：
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DOI：
10.1007/s11661-020-05974-z
发表时间：
2020-10-10
影响因子：
2.8
作者：
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通讯作者：
Zeng, Z. R.
影响因子：
3.6
作者：
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通讯作者：
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