The influence of processing and texture on the grain boundary character distribution of an austenitic Ni 30Fe alloy
The influence of processing and texture on the grain boundary character distribution of an austenitic Ni 30Fe alloy
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加工和织构对奥氏体Ni 30Fe合金晶界特征分布的影响
DOI：
10.1016/j.matchar.2023.112708
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发表时间：
2023
影响因子：
4.7
通讯作者：
Rohrer, Gregory S.
中科院分区：
文献类型：
--
作者：
Beladi, Hossein;Chao, Qi;Tari, Vahid;Rollett, A.D.;Rohrer, Gregory S.
已经确定了加工路线（铸造与迭代再结晶）对奥氏体 Nisingle bond30Fe 合金的织构和晶界网络特征（即布居、平面取向和连通性）的影响。加工路线决定了微观结构演化（即成核和生长）的机制，从而影响整体织构和晶界网络特征。在通过迭代再结晶处理的材料中，微观结构由具有最小能量晶界平面取向的Σ 3 和Σ 9 边界的良好连接网络主导。然而，在铸造材料中，Σ 3 和Σ 9 边界具有较低的相对面积并且更加孤立，这表明它们是通过凝固过程中随机取向的核的意外碰撞而形成的。结果，Σ 3 和Σ 9 晶界不太可能在最低能平面上终止，并且由于三结排列的变化而形成更加不相干的Σ 3 和Σ 9 {2´ 21}对称倾斜晶界。在两种铸造显微组织中，晶界取向差角分布与织构密切相关。对于具有强θ纤维（即<001>//ND）的材料，取向差角分布平坦并且在45°处具有最大值，这是限制[100]轴的晶界取向差的预期结果。
The effect of processing route (casting versus iterative recrystallisation) on the texture and grain boundary network characteristics (ie, population, plane orientation and connectivity) of an austenitic Nisingle bond30Fe alloy has been determined. The processing route determined the mechanism of microstructure evolution (ie, nucleation and growth), and this influenced the overall texture and grain boundary network characteristics. In material processed by iterative recrystallisation, the microstructure was dominated by a well-connected network of∑ 3 and∑ 9 boundaries with minimum energy grain boundary plane orientations. However, in the cast material, the∑ 3 and∑ 9 boundaries had lower relative areas and were more isolated, suggesting they formed through the accidental impingement of randomly oriented nuclei during solidification. As a result, the∑ 3 and∑ 9 boundaries were less likely to be terminated on the lowest energy planes and more incoherent∑ 3 and∑ 9 {2¯ 21} symmetric tilt grain boundaries were formed due to the change in the arrangement of triple junctions. In the two cast microstructures, the grain boundary misorientation angle distribution was strongly correlated with the texture. For the material with a strong θ-fibre (ie,< 001>//ND), the misorientation angle distribution was flat and had a maximum at 45°, an expected result of limiting the grain boundary misorientations the [100] axis.
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影响因子：
3.4
作者：
H. Beladi;V. Tari;G. Rohrer
通讯作者：
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DOI：
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发表时间：
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影响因子：
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