INVESTIGATION ON DEPTH OF HEAT AFFECTED ZONE OF DISCHARGE SPOT BY HIGH REPETITIVE RATE YAG LASER-INDUCED DISCHARGE TEXTURING

Zhengyang Li, Mingjiang Yang, Minlin Zhong and Wenjin Liu
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Zhengyang Li: Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China;
Mingjiang Yang: Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P. R. China
Minlin Zhong: Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China
Wenjin Liu: Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China

Surface Review and Letters (SRL), 2006, vol. 13, issue 04, 403-411

Abstract: It is known that the press formability and the elongation of laser textured sheet are improved, and the service life of textured roll is longer than that of the un-textured roll due to hardening of the treated surface. One of the goals to develop high repetitive rate YAG laser-induced discharge texturing (LIDT) is to get deeper hardening zone. By observing and measuring cross-section of LIDT spots in different discharge conditions, it is found that the single-crater, which is formed by the discharge conditions of anode, which is covered by an oil film and with rectangular current waveform, has the most depth of heat affected zone (HAZ) comparing with other crater shapes when discharge energy is the same. The depth of HAZ is mainly depends on pulse duration when the discharge spot is single-crater. The results are analyzed.

Keywords: Laser; heat affected zone; discharge (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008372

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