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Microstructure and Properties of Cu-Fe-Cr-Ag Alloy Prepared by Directional Solidification and Upward Continuous Casting
Metallurgical and Materials Transactions A ( IF 2.2 ) Pub Date : 2021-04-08 , DOI: 10.1007/s11661-021-06239-z
Dawei Yuan , Jinshui Chen , Xiangpeng Xiao , Baojun Han , Hao Huang , Baixiong Liu , Bin Yang

A Cu-Fe-Cr-Ag alloy was prepared by directional solidification (DS) and upward continuous casting (UCC) to study the effect of different casting methods on the structure and properties of Cu-Fe-Cr-Ag. The results showed that the directionally solidified Cu-Fe-Cr-Ag alloy had excellent mechanical properties and conductivity. After cold drawing and isothermal aging, the peak tensile strength (789 MPa) and peak conductivity (65.5 pct IACS) of directionally solidified Cu-Fe-Cr-Ag alloy were 21 MPa and 4.7 pct IACS higher, respectively, than those that of the upward continuously casted Cu-Fe-Cr-Ag alloy. Compared to upward continuously casted Cu-Fe-Cr-Ag alloy, the Fe dendrites in directionally solidified Cu-Fe-Cr-Ag alloy were much finer, more uniform, and arranged along the direction of the magnetic field. Cu and Ag formed a Cu-Ag eutectic structure at the edge of the directionally solidified Cu-Fe-Cr-Ag alloy rod. After multi-stage thermomechanical treatment, Ag was mainly distributed around the material and formed a structure similar to Ag-clad Cu. The directionally solidified Cu-Fe-Cr-Ag alloy had a smaller lattice constant and finer Fe fibers. The small lattice constant and Fe fibers and the special distribution of Ag lead to the excellent comprehensive performance of the directionally solidified Cu-Fe-Cr-Ag alloy.



中文翻译:

定向凝固和向上连续铸造制备的Cu-Fe-Cr-Ag合金的组织和性能

通过定向凝固(DS)和向上连续铸造(UCC)制备了Cu-Fe-Cr-Ag合金,以研究不同铸造方法对Cu-Fe-Cr-Ag的组织和性能的影响。结果表明,定向凝固的Cu-Fe-Cr-Ag合金具有优良的力学性能和导电性。经过冷拔和等温时效后,定向凝固Cu-Fe-Cr-Ag合金的峰值拉伸强度(789 MPa)和峰值电导率(65.5 pct IACS)分别比定向凝固的Cu-Fe-Cr-Ag合金高21 MPa和4.7 pct IACS。向上连续铸造的Cu-Fe-Cr-Ag合金。与向上连续铸造的Cu-Fe-Cr-Ag合金相比,定向凝固的Cu-Fe-Cr-Ag合金中的Fe树枝状晶体更细,更均匀,并且沿磁场方向排列。Cu和Ag在定向凝固的Cu-Fe-Cr-Ag合金棒的边缘形成Cu-Ag共晶结构。经过多阶段热机械处理后,Ag主要分布在材料周围,并形成类似于覆银铜的结构。定向凝固的Cu-Fe-Cr-Ag合金具有较小的晶格常数和较细的Fe纤维。小的晶格常数和Fe纤维以及Ag的特殊分布使定向凝固的Cu-Fe-Cr-Ag合金具有优异的综合性能。

更新日期:2021-05-03
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