Nd:YAG laser hardening of AISI 410 stainless steel: Microstructural evaluation, mechanical properties, and corrosion behavior

JOURNAL OF ALLOYS AND COMPOUNDS

卷:795

Article

Moradi, Mahmoud^1,2  Ghorbani, Davud^2,3  Moghadam, Mojtaba Karami^1,2  Kazazi, Mahdi^2,4  Rouzbahani, Fardin³  Karazi, Shadi⁵ 

[1] Malayer Univ, Fac Engn, Dept Mech Engn, Malayer, Iran

[2] Malayer Univ, Laser Mat Proc Res Ctr, Malayer, Iran

[3] Islamic Azad Univ, Hamedan Branch, Fac Engn, Dept Mech Engn, Hamadan, Iran

[4] Malayer Univ, Fac Engn, Dept Mat Engn, Malayer, Iran

[5] Dublin City Univ, Sch Mech & Maun Eng, Dublin, Ireland

关键词: Laser surface hardening;    Nd:YAG laser;    Electrochemical tests;    Corrosion;   

DOI  :  10.1016/j.jallcom.2019.05.016

来源: Elsevier

【 摘 要 】

In this paper, a pulsed Nd:YAG laser with a maximum power of 700W, was utilised to investigate the laser surface hardening of AISI 410 martensitic stainless steel. Focal point position, scanning speed and pulse width were considered as process variable parameters. Corrosion behavior of laser surface hardened samples were investigated by IVIUMSTAT apparatus in a 3.5 wt% NaCl solution. Maximum micro-hardness, depth, and width of hardness and percentage of ferrite phase of metallographic and FESEM pictures were evaluated. Results show that surface hardness increased up to 762 HV. Results also reveal that the laser focal point position and pulse width are effective parameters in laser hardening process. In potentiodynamic polarization tests potential stated to increase at a rate of 1 mV/s from -0.4 V to 0.2 V. Results indicate that the corrosion resistance increased due to laser hardening process. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

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