Chinese Journal of Lasers, Volume. 45, Issue 4, 402002(2018)
Oxidation Performance of Ti-48Al-2Nb-2Cr Intermetallic Compounds Prepared by Laser Additive Manufacturing
The microstructure change and oxidation weight increase of Ti-48Al-2Nb-2Cr intermetallic compounds prepared by laser additive manufacturing at the temperature of 850 ℃ are studied, the difference of oxidation behavior between the as-deposited and the as-casted specimens is analyzed, and their oxidation mechanisms are disclosed. The results show that, when the oxidation time is same, the oxidation weight increase rate of the as-deposited specimen is obviously smaller than that of the as-casted specimen. After oxidation of 60 h, the oxidation layer of the as-casted specimen is completely delaminated from the alloy matrix, while the oxidation layer of the as-deposited specimen is well combined locally with the matrix. The compositions of oxidation films of the as-deposited and those of as-casted specimens are different, the former is TiO2/Al2O3/matrix and the latter is TiO2/Al2O3/TiO2+Al2O3/matrix.
Get Citation
Copy Citation Text
Zhang Junsheng, Cheng Xu, Zhang Shuquan, Wu Yu. Oxidation Performance of Ti-48Al-2Nb-2Cr Intermetallic Compounds Prepared by Laser Additive Manufacturing[J]. Chinese Journal of Lasers, 2018, 45(4): 402002
Category: laser manufacturing
Received: Oct. 9, 2017
Accepted: --
Published Online: Apr. 13, 2018
The Author Email: Xu Cheng (chengxu@buaa.edu.cn)