Variation of crystal orientation during epitaxial growth of dendrites by laser deposition. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Wang, Guowei; Liang, Jingjing; Zhou, Yizhou; Zhao, Libin; Jin, Tao; Sun, Xiaofeng
• Is Part Of: Journal of materials science & technology. Volume 34:Issue 4(2018)
• Page Start: 732
• Page End: 735
• Publication Date: 2018-04
• Subjects: Crystal orientation -- Epitaxial growth -- Laser deposition -- Single crystal -- Dendrite growth; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.05.002
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: A nickel-based superalloy was deposited onto a single crystal substrate based on epitaxial laser metal forming (E-LMF). The microstructure development in two depositions has been researched. For the first time, the crystal orientation of dendrites varying beyond 20° was found when the dendrites deflected in deposition. In addition, a new grain boundary was found between different orientation dendrites in a grain, and the detected grain boundary angle was 23°. The result shows that flowing field in laser pool is responsible for this phenomenon.