Laser irradiation of AISI 316L stainless steel coated with Si3N4 and Ti

被引：27
|
作者：
Viswanathan, A.
Sastikumar, D. [1 ]
Rajarajan, P.
Kumar, Harish
Nath, A. K.
机构：
[1] Natl Inst Technol, Dept Phys, Tiruchirappalli 620015, India
[2] Raja Ramanna Ctr Adv Technol, Ind Laser Sect CO2, Indore 452013, India
来源：
OPTICS AND LASER TECHNOLOGY | 2007年 / 39卷 / 08期
关键词：
laser surface modification; Si3N4-Ti coating; Ti5Si3; reinforcement;
D O I：
10.1016/j.optlastec.2007.01.004
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
AISI 316L stainless steel was laser surface treated with different compositions Of Si3N4 and Ti under various laser-processing parameters to improve its surface hardness through reinforcement of Ti-based silicides. The laser-treated regions exhibited improved surface hardness (250-1000 HV), variations in the surface morphology (smooth and bowl like) and presence of cracks and pores depending upon the Si3N4-Ti composition and laser-processing parameters. The study shows that when the Si3N4 Ti composition is 75-25 wt% and laser parameters are 1.5 kW laser power and 1.0 m min(-1) scan speed, a laser-treated region with high hardness of about 800 HV and smooth surface morphology as well as free from pores and cracks is observed. The X-ray. diffractometer (XRD) and Energy-Dispersive Spectroscopy (EDS) analyses show that the laser surface-treated region has reinforced phase of Ti5Si3 and retained austenitic structure. The reinforced phase gives rise to very high hardness (or wear resistance) and also a corrosion resistance. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1504 / 1513
页数：10
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