Investigation The Effect of Nd:YAG Laser on The Hardness and Corrosion Resistance of Carbon steel AISI 1017

Zeyad D. Kadhim; Mohammed Abdulraoof Abdulrazzaq; Suha Q. AL-Shahrabalee

Zeyad D. Kadhim Department of Material Engineering / University of Baghdad
Mohammed Abdulraoof Abdulrazzaq Department of Mechanical Engineering / University of Baghdad
Suha Q. AL-Shahrabalee Department of Material Engineering / Al-Mustansiriyah University

Keywords: carbon steel, Nd:YAG laser, corrosion resistance, surface hardness

Abstract

The influence of Nd:YAG laser on the surface hardness and corrosion resistance of AISI 1017 carbon steel was studied. Samples of the steel were treated with Nd:YAG laser, 532nm wavelength and energy of 200, 220 and 240 mJ. The corrosion test was done by using potentiostate instrument at 23^ºC in sample of water from Tigress River and salt groundwater (Yousifia well 90m below the surface of the ground). The results exhibited that there were improvement in the corrosion resistance of the steel where the best results were obtained at laser energy of 200mJ and the value of corrosion rate reduced from (7.577mpy) to (2.362 mpy) in water sample from Tigress river and from (8.878 mpy) to (3.051 mpy) in water sample from salt well and this mean that there was about 68.8 % improvement in corrosion resistance. In addition to this improvement, there was improvement in surface hardness of the steel at energy of 200 mJ, where the hardness improved from 167 HV to 200.3 HV.