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Enhancement of the wear resistance and microhardness of aluminum alloy by Nd:YaG laser treatment.

Hussein HT, Kadhim A, Al-Amiery AA, Kadhum AA, Mohamad AB - ScientificWorldJournal (2014)

Bottom Line: The specimens were machined as a disk with diameter of 25 mm and circular groove in depth of 3 mm.All specimens were conducted by scanning electron microscopy (SEM), energy-dispersive X-ray fluorescence analysis (EDS), optical microscopy, and Vickers hardness.The results showed that the dry wear rate was decreased after laser hardening and increased Vickers hardness values by ratio of 2.4:1.

View Article: PubMed Central - PubMed

Affiliation: Applied Science Department, University of Technology, Baghdad 10066, Iraq.

ABSTRACT
Influence of laser treatment on mechanical properties, wear resistance, and Vickers hardness of aluminum alloy was studied. The specimens were treated by using Nd:YaG laser of energy 780 mj, wavelength 512 nm, and duration time 8 ns. The wear behavior of the specimens was studied for all specimens before and after treatment by Nd:YaG laser and the dry wear experiments were carried out by sing pinon-disc technique. The specimens were machined as a disk with diameter of 25 mm and circular groove in depth of 3 mm. All specimens were conducted by scanning electron microscopy (SEM), energy-dispersive X-ray fluorescence analysis (EDS), optical microscopy, and Vickers hardness. The results showed that the dry wear rate was decreased after laser hardening and increased Vickers hardness values by ratio of 2.4:1. The results showed that the values of wear rate for samples having circular grooves are less than samples without grooves after laser treatment.

Show MeSH
Nd:YaG laser system.
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Related In: Results  -  Collection


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fig1: Nd:YaG laser system.

Mentions: Laser treatment of samples' surface was performed for two types of samples (with grooves and without grooves) by using Nd:YAG pulses laser type Rofin DY044 (as shown in Figure 1) with energy of 700 mj, wavelength of 512 nm, and duration time of 9 ns. The laser beam was guided by a fiber optics to the focusing the laser beam diameter of 4 mm on the surface of sample, being moved over the surface to obtain 4 mm wide tracks. In order to treat wider zones, different tracks were overlapped with an overlapping percentage of 75%. In this case surface treatment by 500 laser pulses for each sample with surface area of 5.09 cm2. These samples immersed in distilled water with depth of 3 cm and all samples are dried before starting the experiments of wear.


Enhancement of the wear resistance and microhardness of aluminum alloy by Nd:YaG laser treatment.

Hussein HT, Kadhim A, Al-Amiery AA, Kadhum AA, Mohamad AB - ScientificWorldJournal (2014)

Nd:YaG laser system.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4127256&req=5

fig1: Nd:YaG laser system.
Mentions: Laser treatment of samples' surface was performed for two types of samples (with grooves and without grooves) by using Nd:YAG pulses laser type Rofin DY044 (as shown in Figure 1) with energy of 700 mj, wavelength of 512 nm, and duration time of 9 ns. The laser beam was guided by a fiber optics to the focusing the laser beam diameter of 4 mm on the surface of sample, being moved over the surface to obtain 4 mm wide tracks. In order to treat wider zones, different tracks were overlapped with an overlapping percentage of 75%. In this case surface treatment by 500 laser pulses for each sample with surface area of 5.09 cm2. These samples immersed in distilled water with depth of 3 cm and all samples are dried before starting the experiments of wear.

Bottom Line: The specimens were machined as a disk with diameter of 25 mm and circular groove in depth of 3 mm.All specimens were conducted by scanning electron microscopy (SEM), energy-dispersive X-ray fluorescence analysis (EDS), optical microscopy, and Vickers hardness.The results showed that the dry wear rate was decreased after laser hardening and increased Vickers hardness values by ratio of 2.4:1.

View Article: PubMed Central - PubMed

Affiliation: Applied Science Department, University of Technology, Baghdad 10066, Iraq.

ABSTRACT
Influence of laser treatment on mechanical properties, wear resistance, and Vickers hardness of aluminum alloy was studied. The specimens were treated by using Nd:YaG laser of energy 780 mj, wavelength 512 nm, and duration time 8 ns. The wear behavior of the specimens was studied for all specimens before and after treatment by Nd:YaG laser and the dry wear experiments were carried out by sing pinon-disc technique. The specimens were machined as a disk with diameter of 25 mm and circular groove in depth of 3 mm. All specimens were conducted by scanning electron microscopy (SEM), energy-dispersive X-ray fluorescence analysis (EDS), optical microscopy, and Vickers hardness. The results showed that the dry wear rate was decreased after laser hardening and increased Vickers hardness values by ratio of 2.4:1. The results showed that the values of wear rate for samples having circular grooves are less than samples without grooves after laser treatment.

Show MeSH