Improved Recrystallization Resistance of Al–Cu–Li–Zr Alloy through Ce Addition

Metals

Han Dai¹  Wenwen Liu¹  Junfeng Zhao¹  Jie Sun¹  Xinxiang Yu¹  Caiqiong Li¹  Zhutie Li² 

[1] Laboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, China;Testing Center, Hang Xin Material Technology Co. Ltd., Longkou 264006, China;

关键词: Al–Cu–Li alloy;    cerium;    texture;    inhibition of recrystallization;    microstructure;   

DOI  :  10.3390/met8121035

来源: DOAJ

【 摘 要 】

The effects of the addition of 0.29 wt % Ce on the recrystallization behavior of an Al⁻Cu⁻Li⁻0.13Zr (wt %) alloy during isothermal annealing were investigated. Ce addition greatly improved inhibition of recrystallization in this alloy compared with that in the Ce-free alloy. The texture of the Ce-containing alloy contained a large amount of β-fibers and fibrous unrecrystallized grain microstructures distributed along the rolling direction in the overall annealing process. The improved recrystallization resistance endowed by Ce addition can be attributed to the large number of small Al₈Cu₄Ce species formed on the grain boundary. These fine particles with high-temperature stability can exert a Zener pressure on the Al₃Zr dispersoid-free grain boundary. The yield strength of the Ce-containing alloy increased significantly, to 38 MPa, and the fracture toughness improved by 56.28% compared with those of the Ce-free alloy. This work provides a convenient and economical method for enhancing the overall performance of an Al⁻Cu⁻Li⁻Zr alloy via recrystallization inhibition by Ce addition.

【 授权许可】

Unknown