Ultrasound assisted in-situ casting technique for synthesizing small-sized blocky Al3Ti particles reinforced A356 matrix composites with improved mechanical properties
Ultrasound assisted in-situ casting technique for synthesizing small-sized blocky Al3Ti particles reinforced A356 matrix composites with improved mechanical properties
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超声辅助原位铸造技术合成小尺寸块状Al3Ti颗粒增强A356基复合材料并提高力学性能
DOI：
10.1016/j.jallcom.2018.02.010
复制
发表时间：
2018-05
影响因子：
6.2
通讯作者：
Han Qingyou
中科院分区：
文献类型：
--
作者：
Yang Cuicui;Liu Zhiwei;Zheng Qiaoling;Cao Yiliang;Dai Xiaohan;Sun Liang;Zhao Jingrui;Xing Ji;ong;Han Qingyou
以A356-K2 TiF 6体系为原料，采用超声辅助原位凝固技术，在800 °C下制备了高强度、高塑性的5wt%Al3Ti/A356复合材料。研究了超声处理（UT）和非超声处理（NU）试样的显微组织和力学性能。结果表明，Si元素的溶解度为9-11 at. %的固溶量，并通过第一性原理计算证明了这种固溶趋势。在超声场作用下，原位生成的Al 3 Ti颗粒由棒状转变为块状，平均尺寸减小到4 μm。Al 3 Ti颗粒均匀分布在基体中，且大部分位于α-Al晶体内部。由于Al 3 Ti的形核作用和均匀分布，UT试样中出现了长柱状枝晶的等轴转变和α-Al晶粒的细化，从而提高了强度和塑性。与T6-A356相比，T6-UT试样的屈服强度、抗拉强度和伸长率分别提高了12.0%、27.2%和313.3%。此外，在本研究中，复合材料的力学性能，包括强度和塑性的改善的机制进行了研究。
The in-situ 5 wt% Al3Ti/A356 composites with high strength and good ductility were prepared from A356-K2TiF6system by an ultrasound assisted in-situ casting technique at 800 °C. The microstructures and mechanical properties of ultrasonic-treated (UT) and non-ultrasonic (NU) samples were examined. It was found that Si element had a solubility of 9–11 at. % in the in-situ formed Al3Ti particle-reinforcement and this solution tendency was proved by a first-principles calculation. In the ultrasonic fields, the in-situ Al3Ti particles were changed from rod-like to blocky in morphology with a reduced average size of 4 μm. Also, Al3Ti particles were distributed uniformly in the matrix and most of which located inside the α-Al crystals. Owing to the nucleating effect and uniform distribution of Al3Ti, both the equiaxed transition from long columnar dendrite structure and refining of α-Al crystals occurred in the UT sample, which contributed to the improvement of both strength and ductility. Compared with T6-A356, the yield strength, ultimate tensile strength and elongation of the T6-UT sample were improved by 12.0%, 27.2% and 313.3%, respectively. Furthermore, the mechanisms of the improved mechanical properties, including the strength and ductility, of the composites were investigated in this research.
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DOI：
10.1007/s11661-015-2850-3
发表时间：
2015-07-01
影响因子：
2.8
作者：
Vorozhtsov, Sergey A.;Eskin, Dmitry G.;Khrustalyov, Anton P.
通讯作者：
Khrustalyov, Anton P.
影响因子：
6.2
作者：
Jing‐Kai Qin;Gang Chen;X. Ji;Xiaoguo Song;N. Hu;Fei Han;Z. Du
通讯作者：
Jing‐Kai Qin;Gang Chen;X. Ji;Xiaoguo Song;N. Hu;Fei Han;Z. Du
T6热处理对变质A356合金显微组织、拉伸性能和断裂行为的影响
DOI：
10.1016/j.matdes.2011.11.018
发表时间：
2012-04
期刊：
Materials & Design
影响因子：
--
作者：
坚增运
通讯作者：
坚增运
影响因子：
8.4
作者：
Kumar, Narendra;Gautam, Rakesh Kumar;Mohan, Sunil
通讯作者：
Mohan, Sunil
影响因子：
6.2
作者：
S. Sajjadi;M. T. Parizi;H. Ezatpour;A. Sedghi
通讯作者：
S. Sajjadi;M. T. Parizi;H. Ezatpour;A. Sedghi