Laser Induced Evaporation from Stainless Steel Surfaces.
Abstract
Laser-induced evaporation from a stainless steel surface was the laser-target damage mechanism which was studied. Infrared laser pulses with irradiances higher than 10 to the 9th power W/sq.cm. were produced by a Q-switched neodymium glass laser. Experiments were performed in a vacuum chamber evacuated to about 10 to the 9th power W/sq.cm. Torr. The mass of evaporated material, area of laser-drilled hole and depth of damaged hole were measured. Results showed that the mass of evaporated material was proportional to sq.rt. F where F is the laser flux in W/sq.cm. Surface damage phenomena were studied by metallographic methods using an optical microspace and scanning electron microscope (SEM). Evaporated materials were partially collected and analyzed separately with the SEM and Princeton Gamma Tech (PGT) 1000 x-ray analyzer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA066495
Entities
People
- Zen Wen Hwang
Organizations
- Naval Postgraduate School