Correlation between dynamic recrystallization and formation of rare earth texture in a Mg-Zn-Gd magnesium alloy during extrusion.
Correlation between dynamic recrystallization and formation of rare earth texture in a Mg-Zn-Gd magnesium alloy during extrusion.
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Mg-Zn-Gd镁合金挤压过程中动态再结晶与稀土织构形成的相关性
DOI：
10.1038/s41598-018-35170-4
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发表时间：
2018-11-14
影响因子：
4.6
通讯作者：
Han EH
中科院分区：
文献类型：
--
作者：
Jiang MG;Xu C;Yan H;Lu SH;Nakata T;Lao CS;Chen RS;Kamado S;Han EH
在镁合金中添加微量稀土元素可以改善挤压织构，形成稀土织构，从而改善镁合金的成形性能。对Mg-1.5Zn-0.5Gd（wt.%）进行了间断挤压实验和电子背散射衍射（EBSD）表征合金的动态再结晶机制及其与稀土织构形成的关系。结果表明，连续动态再结晶（CDRX）控制了显微组织的发展。通过CDRX，具有30° [0001]晶界的新鲜DRX晶粒优先在具有[100]基底纤维取向的未DRX晶粒中成核，显示优先选择[20]基底纤维取向而不是RE织构取向。因此，CDRX对[100]基纤维织构的弱化有贡献，对[20]基纤维织构组分的形成影响大于RE织构组分。此外，在挤压后的静态退火过程中，具有RE织构取向的再结晶晶粒发生了择优生长，这可能是稀稀土镁合金中RE织构形成的主要原因。
The trace addition of rare earth (RE) elements in Mg alloys can modify the extrusion texture, leading to the formation of RE texture and thus improved formability. The interrupted extrusion experiment as well as electron back-scatter diffraction (EBSD) characterization was conducted in Mg-1.5Zn-0.5Gd (wt.%) alloy to unveil the dominant dynamic recrystallization (DRX) mechanism and its correlation with the formation of RE texture during extrusion. The results indicate that continuous DRX (CDRX) dominated the microstructural development. Fresh DRXed grains with 30° [0001] grain boundaries preferentially nucleated in unDRXed grains with [100] basal fiber orientation via CDRX, showing preferred selection of [20] basal fiber orientation rather than RE texture orientation. Consequently, CDRX contributed to the weakening of [100] basal fiber texture and had a more significant effect on the formation of [20] basal fiber component than that of RE texture component. Besides, the preferred growth of recrystallized grains with RE texture orientation was confirmed to occur during static annealing after extrusion, which is inferred as the key reason for the formation of RE texture in dilute Mg-RE alloys.
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影响因子：
6
作者：
Barrett, Christopher D.;Imandoust, Aidin;El Kadiri, Haitham
通讯作者：
El Kadiri, Haitham
影响因子：
6
作者：
Barnett, M. R.;Sullivan, A.;Beer, A.
通讯作者：
Beer, A.
DOI：
10.1007/s11661-007-9207-5
发表时间：
2007-08-01
影响因子：
2.8
作者：
Beer, A. G.;Barnett, M. R.
通讯作者：
Barnett, M. R.
DOI：
10.1007/s11661-018-4520-8
发表时间：
2018-05-01
影响因子：
2.8
作者：
Imandoust, Aidin;Barrett, Christopher D.;El Kadiri, Haitham
通讯作者：
El Kadiri, Haitham
影响因子：
9.4
作者：
Bugnet, M.;Kula, A.;Botton, G. A.
通讯作者：
Botton, G. A.