Growth stability of twinned dendrites in directionally solidified Al-4.5 wt% Cu alloy
Growth stability of twinned dendrites in directionally solidified Al-4.5 wt% Cu alloy
复制标题
生长%20稳定性%20of%20孪晶%20枝晶%20in%20定向%20凝固%20Al-4.5%20wt%%20Cu%20合金
DOI：
10.1016/j.matlet.2017.12.016
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发表时间：
2018-03
影响因子：
3
通讯作者：
Fu Hengzhi
中科院分区：
文献类型：
--
作者：
Yang Luyan;Li Shuangming;Guo Junbo;Fan Kai;Li Yang;Zhong Hong;Fu Hengzhi
基于3000 μm/s时孪晶面的形成，详细研究了Al-4.5wt%Cu合金在Bridgman凝固过程中低生长速率下孪晶枝晶的生长稳定性。实验结果表明，即使将速率降低到20 μm/s，孪晶生长仍能保持稳定。这远低于通常的孪晶枝晶形成速率阈值（约1000 μm/s）。在20 μm/s时，孪晶结构占主导地位，其（111）孪晶面和<1 1 0>枝晶主干最靠近热梯度方向。重要的是，直接连接两个相邻孪晶边界的明显层错（SF）结构为铝合金中SF与孪晶枝晶生长之间的密切相关性提供了直接的实验证据。
Based on the twin planes formed at 3000 μm/s, the growth stability of twinned dendrites in Al-4.5 wt% Cu alloy was studied in detail at a low growth rate during Bridgman solidification. Experimental results show that the twinned dendrite growth could still keep stable even after decreasing the rate to 20 μm/s. This is far below the usual rate threshold for the formation of twinned dendrites (∼1000 μm/s). The dominated twinned structures at 20 μm/s have their (1 1 1) twin plane and <1 1 0> dendritic trunk closest to thermal gradient direction. Importantly, distinct stacking fault (SF) structures directly connecting two adjacent twin boundaries provide a direct experimental evidence for the close correlation between the SFs and the twinned dendrite growth in aluminum alloys.
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影响因子：
4.5
作者：
Lei Li;Yudong Zhang;C. Esling;Zhi-hao Zhao;Y. Zuo;Haitao Zhang;J. Cui
通讯作者：
Lei Li;Yudong Zhang;C. Esling;Zhi-hao Zhao;Y. Zuo;Haitao Zhang;J. Cui
影响因子：
6
作者：
M. A. Salgado-Ordorica;J. Valloton;M. Rappaz
通讯作者：
M. A. Salgado-Ordorica;J. Valloton;M. Rappaz
影响因子：
9.4
作者：
Kurtuldu, Gueven;Jarry, Philippe;Rappaz, Michel
通讯作者：
Rappaz, Michel
影响因子：
41.2
作者：
Haxhimali, Tomorr;Karma, Alain;Rappaz, Michel
通讯作者：
Rappaz, Michel
影响因子：
9.4
作者：
M. A. Salgado-Ordorica;M. Rappaz
通讯作者：
M. A. Salgado-Ordorica;M. Rappaz