title: Direct patterning in sub-surface of stainless steel using laser pulses.
abstract: This paper reports for the first time on the direct creating microcavities in sub-surface of stainless steel using a single Nd:YAG laser pulse. The low peak power density is used in the process, which is in the order of 1 MW/cm(2). The formation of the microcavities in the sub-surface of stainless steel is an evidence of volume expulsion during laser-metal interaction. Direct patterning in the sub-surface of stainless steel is demonstrated by realizing a series of microcavities to form a pre-designed pattern. Potential applications of sub-surface patterning in metal, such as security marking, micro-heater, micro-insulator and micro-sensor, are discussed.
authors: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075 Singapore. zlli@SIMTech.a-star.edu.sg
authors: Z L
authors: ZL
authors: Li
authors: T
authors: T
authors: Liu
authors: C C
authors: CC
authors: Khin
authors: A C
authors: AC
authors: Tan
authors: L E
authors: LE
authors: Khoong
authors: H Y
authors: HY
authors: Zheng
authors: W
authors: W
authors: Zhou