材料科学
点蚀
冶金
腐蚀
激光器
马氏体不锈钢
马氏体
微观结构
硬度
硬化(计算)
Nd:YAG激光器
极化(电化学)
脉冲持续时间
复合材料
光学
物理
图层(电子)
化学
物理化学
作者
B. Mahmoudi,M.J. Torkamany,A. Sabour Rouhaghdam,J. Sabbaghzade
出处
期刊:Materials in engineering
[Elsevier]
日期:2010-05-01
卷期号:31 (5): 2553-2560
被引量:106
标识
DOI:10.1016/j.matdes.2009.11.034
摘要
The AISI 420 martensitic stainless steel was surface-hardened by a pulsed Nd:YAG laser. The influences of process parameters (laser pulse energy, duration time and travel speed) on the depth and hardness of laser treated area and its corrosion behavior were Investigated. In the optimum process parameters, maximum hardness (490 VHN) in the laser surface treated area was achieved. The pitting corrosion behavior was studied by potentiodynamic polarization technique in 3.5% NaCl solution at 25 °C. Metallographical and electrochemical corrosion studies illustrated beneficial effects of laser surface hardening by refining the microstructure and enhancing the pitting corrosion resistance of the martensitic stainless steel. The pitting corrosion resistance of laser surface treated samples in 3.5% NaCl solution depends on the overlap ratio clearly. The pitting potential (Epp) decreased significantly by increasing the ratio of pulse overlapping.
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