Influence of the rolling direction on the microstructure, mechanical, anisotropy and gamma rays shielding properties of an Al-Cu-Li-Mg-X alloy
Influence of the rolling direction on the microstructure, mechanical, anisotropy and gamma rays shielding properties of an Al-Cu-Li-Mg-X alloy
复制标题
轧制方向对Al-Cu-Li-Mg-X合金显微组织、力学、各向异性和γ射线屏蔽性能的影响
DOI：
10.1016/j.msea.2018.06.074
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发表时间：
2018-08-08
期刊：
影响因子：
6.4
通讯作者：
Zhang, Milin
中科院分区：
文献类型：
--
作者：
Medjahed, Aboubakr;Moula, Houssameddine;Zhang, Milin
研究了不同取向(0度、45度和90度)对Al-Cu-Li-Mg-X(X=Mn，Zr，Zn)合金的显微组织、力学性能、面内各向异性(IPA)和伽马射线(γ射线)屏蔽性能的影响。结果表明，沿多个方向轧制对应着不同的显微组织，这对性能有很大影响。合金的主要强化相为Delta‘(Al_3Li)、Al-3(Zr，Li)和T-1(Al_2CuLi)，其中T-1析出相的强化作用占主导地位。合金沿0度方向轧制时，析出物主要为‘(Al3Li)相、少量Al-3(Zr，Li)相和粗大的T-1(Al2CuLi)相；沿45度方向轧制时，析出大量细小的T-1(Al2CuLi)相和少量的’(Al3Li)相和Al-3(Zr，Li)相，沿90度方向轧制时，合金中还析出大量带有少量‘(Al3Li)相的Al-3相。沿90°取向轧制的合金表现出合适的各向同性力学行为，这是由于位错的均匀分布导致强化相在三个拉伸角上均匀弥散所致。此外，随着轧制方向的改变，屏蔽性能表现出不同的屏蔽率。90度滚压方向具有最理想的屏蔽性能。
The impact of different rolling orientations (0 degrees, 45 degrees and 90 degrees) on the microstructure, mechanical, in-plane anisotropy (IPA) and gamma rays (y-rays) shielding properties of a lately developed Al-Cu-Li-Mg-X (X = Mn, Zr, Zn) alloy was investigated. The results showed that rolling along several directions corresponded to distinctive microstructures, which considerably affected the properties. The main strengthening phases in the alloy were delta'(Al3Li), Al-3(Zr,Li) and T-1(Al2CuLi), while the strengthening effect of the T-1 precipitates was predominant. The main precipitates were delta'(Al3Li), minor Al-3(Zr,Li) and coarse T-1(Al2CuLi) phases when rolled along the 0 degrees direction, a large amount of fine T-1(Al2CuLi) phase with few delta'(Al3Li) and Al-3(Zr,Li) precipitates by rolling along the 45 degrees direction, besides, a large amount of the Al-3(Zr,Li) phase with minor delta'(Al3Li) in the alloy rolled along the 90 degrees direction. The alloy rolled along the 90 degrees orientation exhibited the appropriate isotropic mechanical behavior, which was caused by the homogeneously distributed dislocations that produced a homogeneous dispersion of the strengthening precipitates in the three tensile angles. In addition, the shielding property showed different screening ratios when varying the rolling direction. The 90 degrees rolling direction presented the most desirable shielding property.