Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting
Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting
复制标题
流变压铸半固态Al-8Si-0.5Fe合金的凝固行为及增强性能
DOI：
10.1016/j.jmrt.2022.06.062
复制
发表时间：
2022-06
期刊：
影响因子：
--
通讯作者：
Renguo Guan
中科院分区：
文献类型：
--
作者：
Yan Liu;Minqiang Gao;Shuancheng Meng;Ying Fu;Weirong Li;Chunhua Li;Renguo Guan
与高压压铸相比，流变压铸在减少缺陷、细化组织、提高性能等方面具有优势。本文采用流变压铸法制备了一种力学性能和导热性能都很好的Al-8Si-0.5Fe合金。讨论了该合金在流变压铸下的凝固行为、力学性能和导热性能。结果表明：冷却效应和剪切振动不仅影响振动收缩斜板的初次凝固，而且影响流变压铸过程中残余液的二次凝固。该流变压铸合金具有球状初生α1-Al晶粒和次生α2-Al晶粒、小尺寸Al5FeSi相、共晶Si相、低孔隙率等特点，具有较高的力学性能和导热性。浇注温度从690℃降低到670℃，由于冷却速度快，初生α1-Al晶粒、次生α2-Al晶粒、Al5FeSi相和共晶Si相的尺寸减小，进一步提高了合金的力学性能和导热系数。
Compared with the high pressure diecasting, rheo-diecasting has an advantage in decreasing defects, refining microstructure and improving properties. In the present work, an Al–8Si–0.5Fe alloy with a good combination of mechanical property and thermal conductivity was obtained by rheo-diecasting. The solidification behavior, mechanical properties, and thermal conductivity of the alloy under rheo-diecasting were discussed. The results demonstrated that the chilling effect and shearing vibration not only affected the primary solidification on the vibrating contraction sloping plate, but also the secondary solidification in the remaining liquid during rheo-diecasting. The rheo-diecasting alloy possessed spherical primary α1-Al grains and secondary α2-Al grains, small-sized Al5FeSi phases, eutectic Si phases, and low porosities, and thus exhibited the high mechanical properties and thermal conductivity. With decreasing pouring temperature from 690 °C to 670 °C, the size of primary α1-Al grains, secondary α2-Al grains, Al5FeSi phases and eutectic Si phases was decreased due to high cooling rate, which further improved the mechanical properties and thermal conductivity of the alloy.
登录
查看更多内容
DOI：
10.1007/s12613-016-1337-6
发表时间：
2016-10
期刊：
International Journal of Minerals, Metallurgy, and Materials
影响因子：
--
作者：
Kunhyok Ri;W. Mao;Zhi-kai Zheng;Myongsik Kim;Yong-Deok Sin
通讯作者：
Kunhyok Ri;W. Mao;Zhi-kai Zheng;Myongsik Kim;Yong-Deok Sin
DOI：
10.1007/s40195-021-01231-3
发表时间：
2021-05
期刊：
Acta Metallurgica Sinica (English Letters)
影响因子：
--
作者：
M. Qi;Y. Kang;Jingyuan Li;Yuzhao Xu;Jicheng Wang;Gunan Li;Aisen Liu
通讯作者：
M. Qi;Y. Kang;Jingyuan Li;Yuzhao Xu;Jicheng Wang;Gunan Li;Aisen Liu
DOI：
10.1016/j.jmatprotec.2020.116800
发表时间：
2020-11-01
影响因子：
6.3
作者：
Qi, Mingfan;Kang, Yonglin;Chen, Junchen
通讯作者：
Chen, Junchen
DOI：
10.1016/j.msea.2020.139040
发表时间：
2020-03-03
影响因子：
6.4
作者：
Qi, Mingfan;Kang, Yonglin;Li, Jingyuan
通讯作者：
Li, Jingyuan
影响因子：
2.9
作者：
Sukangkana Talangkun;Charinrat Potisawang;Phuriphut Saenpong
通讯作者：
Sukangkana Talangkun;Charinrat Potisawang;Phuriphut Saenpong