Related Experiment Video
Updated: Jun 10, 2026
11:34
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
Published on: May 15, 2017
Direct patterning in sub-surface of stainless steel using laser pulses
1Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075 Singapore. zlli@SIMTech.a-star.edu.sg
Optics Express
|August 20, 2010
Summary
Researchers created sub-surface microcavities in stainless steel using a single laser pulse. This novel method enables direct patterning for applications like security marking and micro-sensors.
Area of Science:
- Materials Science
- Laser Physics
- Surface Engineering
Background:
- Stainless steel is a widely used material in various industries.
- Sub-surface modification of metals offers unique advantages for advanced applications.
- Laser-based techniques are crucial for precise material processing.
Purpose of the Study:
- To report the direct creation of sub-surface microcavities in stainless steel.
- To demonstrate sub-surface laser patterning for pre-designed structures.
- To explore potential applications of this novel technique.
Main Methods:
- Utilizing a single Nd:YAG laser pulse for material processing.
- Employing low peak power density (approx. 1 MW/cm²).
- Directly patterning stainless steel by creating a series of microcavities.
Main Results:
- Successful formation of microcavities within the sub-surface of stainless steel.
- Evidence of volume expulsion during laser-metal interaction.
- Demonstration of direct sub-surface patterning through laser-induced microcavities.
Conclusions:
- Direct sub-surface microcavity creation in stainless steel is achievable with a single laser pulse.
- This technique allows for precise, pre-designed patterning.
- Potential applications include security marking, micro-heaters, micro-insulators, and micro-sensors.
