Invited speaker

Prof. Guang Yang

Shenyang Aerospace University

Tel:18040037100

Title: Research on the Behavior of Laser Deposition Molten Pools

Profile:

介绍激光与材料的作用，详细介绍激光熔池的产生、扩张、稳定过程。介绍激光沉积气孔缺陷的来源、熔池气孔的演化过程。介绍激光沉积修复航空材料及应用。

This presentation explores the fundamental interaction between lasers and materials, with a detailed examination of the melt pool lifecycle—including its generation under high-energy irradiation, dynamic expansion driven by thermal gradients, and stabilization through controlled solidification. It further investigates the origins of porosity defects in laser deposition, analyzing key contributing factors such as gas entrapment, keyhole instability, and insufficient melt flow, while tracing the evolution of pores from nucleation to final microstructure. Finally, the talk highlights the application of laser deposition technology in repairing high-performance aerospace materials, discussing process optimization, defect mitigation strategies, and case studies of restored components like turbine blades and structural alloys, demonstrating its potential for extending service life and reducing costs in critical aviation systems.