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Microstructure Formation and Tailoring of the Intermetallic TiAl Alloy Produced by Direct Laser Deposition
Metallurgical and Materials Transactions A ( IF 1.985 ) Pub Date : 2019-11-21 , DOI: 10.1007/s11661-019-05552-y
Xinyu Zhang, Chuanwei Li, Haozhang Zhong, Xudong Yang, Jianfeng Gu

This study investigates the microstructure morphology in a single-track wall of Ti-47Al-2Cr-2Nb alloy produced by direct laser deposition. The as-deposited wall mainly exhibited an alternative-band microstructure containing a dendrite band and α2/γ lamellar band, which is considered to result from the influence of the heat affected zone. A tailoring method was proposed and alternative-band microstructures with various equiaxed colony fractions, and even nearly fully equiaxed colony microstructures, were successfully obtained.
更新日期:2019-12-21

 

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