Microstructure Formation and Tailoring of the Intermetallic TiAl Alloy Produced by Direct Laser Deposition

  • Xinyu Zhang
  • Chuanwei LiEmail author
  • Haozhang Zhong
  • Xudong Yang
  • Jianfeng GuEmail author


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.


This work was supported by the National Natural Science Foundation of China (Grant No. 51971145 and No. 51801126) and the National Key Research and Development Program of China (Grant No. SQ2018YFB200007).


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  1. 1.Institute of Materials Modification and Modelling, School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Materials Genome Initiative CenterShanghai Jiao Tong UniversityShanghaiChina
  3. 3.Shanghai Key Laboratory of Materials Laser Processing and ModificationShanghai Jiao Tong UniversityShanghaiChina

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