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

Abstract

In this paper, a pulsed Nd:YAG laser with a maximum power of 700 W, was utilized 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 3.5wt% NaCl solution. Maximum microhardness, 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.

Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

“…Additionally, In Figure 10, the perturbation plot of the bottom kerf width is illustrated. Since the FPP parameter in the regression Equations (6) and 7and its F-Value in ANOVA table are greater than the cutting speed factors, the slope of the FPP curve is greater than the other curves. Therefore, FPP parameter has the greatest effect on the bottom kerf width.…”

“…LMP methods are beneficial for different industrial applications. For example, laser welding, laser surface hardening, laser drilling, laser additive manufacturing, laser engraving, laser forming, laser machining, and laser cutting are some of the useful applications of the laser technologies [3][4][5][6][7][8][9][10][11]. In the well known laser cutting process, by focusing the laser beam on a particular point, the material is cut off by the laser.…”

Growth, Optical, and Laser Properties of Large‐Sized Cr,Nd:Y3Al5O12 Crystal

“…[13] The characteristic absorption peak for Cr 4+ : 3 A 2 → 3 T 2 in the range of 1000 to 1150 nm was not observed. [19] Compared with Nd:YAG crystal, the intensity of the two wide absorption bands within 400-500 nm and 550-650 nm increases remarkably, which indicates that the pump energy of the xenon lamp could transfer to Nd 3+ ions by 4 A 2 → 4 T 1 / 4 T 2 transitions. Figure 5 shows the emission spectra of Cr,Nd:YAG crystal recorded under 808 and 450 nm excitations.…”

“…Nd 3+ doped Y 3 Al 5 O 12 (YAG) crystal is a well-known laser crystal for 1.06 μm nearinfrared laser output in many fields, such as surgical operation, medical treatment, laser radar and surface treatment. [1][2][3][4] In account of the narrow absorption band of Nd 3+ , it is suitable to choose laser diode (LD) as the pump source. Cr 3+ has broad and strong absorption in the visible region, and Nd 3+ can be sensitized effectively by Cr 3+ in many host materials, such as Gd 3 Sc 2 Al 3 O 12 (GSAG) and Gd 3 Sc 2 Ga 3 O 12 (GSGG).…”

Experimental and Numerical Study of AISI 4130 Steel Surface Hardening by Pulsed Nd:YAG Laser

“…While used for various industrial utilizations such as welding [1,2], drilling [3], and cutting [4], laser beam treatment is effective when a localized treatment is required [5]. In fact, laser has high accuracy and emits a centralized beam, which can be used for heat treating metal surfaces [6]. Hence, laser surface transformation hardening (LSTH) is a precise method because it offers controllable heat in the selected area in order to produce hardened surface layers.…”