Effect of erbium (Er) on the hot cracking behaviour of Al-5Cu alloy. Issue 17 (22nd November 2022)

• Record Type: Journal Article
• Authors: Zou, Minqiang; Ge, Zhen; Qi, Liang; Zhou, Xingyu; Wei, Xinyu; Zhang, Jiayi; Chen, Jiqiang
• Is Part Of: Materials science and technology. Volume 38:Issue 17(2022)
• Page Start: 1501
• Page End: 1509
• Publication Date: 2022-11-22
• Subjects: Al alloy -- Er -- hot cracking -- microstructure -- Al8Cu4Er; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2022.2088160
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : In this paper, the effect of Er on the hot cracking behaviour of Al-5Cu alloy is investigated by the means of wedge moulds, differential hot analyzer, optical microscope, and scanning electron microscope. The results show that the percentage of intergranular low-melting-point eutectic structure is increased by approximately 8% on average per 0.3 wt-% Er additions. The increase of low-melting-point eutectic structure enhances the fluidity of the liquid film in the late solidification stage, resulting in the improvement of the hot cracking resistance of the alloy. Moreover, the Al-5Cu-0.6Er alloy has the best hot cracking resistance under wedge-shaped copper casting experiments.