Effects of Minor Sc and Zr Compound Alloying on Microstructure and Properties of Al-4Cu-1.5Mg Alloy

Xiang Qingchun; Hou Lina; Zhao Jing; Li Rongde

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Effects of Minor Sc and Zr Compound Alloying on Microstructure and Properties of Al-4Cu-1.5Mg Alloy
Vol. 30, Issue 7, Pages: 611-614(2010)
Published： 2010 ，
DOI：

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[1]向青春,侯丽娜,赵静,李荣德.Sc、Zr微合金化对Al-4Cu-1.5Mg合金组织与性能的影响[J].特种铸造及有色合金,2010,30(07):611-614+582-583.

Xiang Qingchun, Hou Lina, Zhao Jing, et al. Effects of Minor Sc and Zr Compound Alloying on Microstructure and Properties of Al-4Cu-1.5Mg Alloy. [J]. Special Casting & Nonferrous Alloys 30(7):611-614(2010)
[1]向青春,侯丽娜,赵静,李荣德.Sc、Zr微合金化对Al-4Cu-1.5Mg合金组织与性能的影响[J].特种铸造及有色合金,2010,30(07):611-614+582-583. DOI：

Xiang Qingchun, Hou Lina, Zhao Jing, et al. Effects of Minor Sc and Zr Compound Alloying on Microstructure and Properties of Al-4Cu-1.5Mg Alloy. [J]. Special Casting & Nonferrous Alloys 30(7):611-614(2010) DOI：

摘要

试验研究了Sc和Zr复合微合金化对Al-4Cu-1.5Mg合金铸态显微组织与力学性能的影响规律。结果表明

复合添加微量Sc和Zr

有效改善了合金铸态微观组织

细化了合金晶粒

使粗大的树枝晶转变为均匀细小的等轴晶。当Sc、Zr含量分别为0.4%和0.2%时

合金的抗拉强度、屈服强度及伸长率分别为275.0MPa、176.0MPa和8.0%

与未添加合金元素的Al-4Cu-1.5Mg合金相比

抗拉强度提高了55.3%

伸长率提高了近3倍。

Abstract

Effects of minor Sc and Zr compound alloying on as-cast microstructure and mechanical properties of Al-4Cu-1.5Mg alloy were investigated.It is found that as-cast microstructure of the alloy is effectively improved by minor Sc and Zr compound addition

in which grain size is greatly refined and coarse dendrite is converted into uniform fine equiaxe grain.Tensile strength

yield strength and elongation of the alloy with 0.4% Sc and 0.2% Zr compound addition reach up to 275.0MPa

176.0MPa and 8.0%

respectively

increased by 55.3% in tensile strength and about 300% in elongation compared with Al-4Cu-1.5Mg matrix alloy.