Variation of crystal orientation during epitaxial growth of dendrites by laser deposition

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 732-735
• 页数: 4页
• 语种: 英文

摘要

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.