scholarly journals Influence of Nd:YAG Laser Energy on Mechanical properties of Nitriding Steel

2020 ◽  
Vol 23 (2) ◽  
pp. 187-193
Author(s):  
Ansam Abdul Jabbar Aziz ◽  
Enass A. Khalid ◽  
Abbas S. Alwan
Keyword(s):  
Mechanical Properties ◽  
Wear Rate ◽  
Surface Treatment ◽  
Nd:Yag Laser ◽  
Laser Energy ◽  
Thermochemical Treatment ◽  
Surface Heat ◽  
Laser Surface ◽  
Micro Hardness ◽  
Laser Surface Treatment

Desired mechanical properties like microstructure, micro hardness and wear resistance are the key parameters for which low carbon steel (AISI 1006) are widely selected. Surface heat treatment applied to improve these properties; traditionally surface heat treatments like induction hardening, in recent time’s laser surface hardening. In this work, thermochemical treatment (liquid nitriding) by using mixture from 61% NaCN, 15% K2CO3 and 24% KCL and followed by Nd:YAG laser surface treatment was done . The laser parameter were energy (0.89, 2, 4 and 9) J, spot diameter (0.790 ,0.33, 0.283 and 0.224) mm, pulses duration (1, 2.33, 4.47 and 9.87) ms with  fix wavelength 1604nm. Laser surface treatment cycle was melting the layer surface, holding and rapid cooling in air medium.  Optical microscopy (OM) and scanning electron microscope (SEM) has been used to study the microstructures and cross-sectional of molted and heat affected zones respectively. The wear test was done to measure the wear rate by using pin -on-disk principles were satisfied. The result shown that increasing in laser energy effects to increase in the area of melted and heat affected zones of nitriding steel. Also increasing in laser energy led to increase micro hardness about 61%, while wear rate decrease about 40 % and increased depth of molted zone.

The Laser Surface Treatment Effective on Structural Properties for Invar Alloy (Fe-Ni) Type Prepared by Powder Technology

2020 ◽  
Vol 844 ◽  
pp. 97-103
Author(s):  
Omar Fadhilh Abdullah ◽  
Orass Abdulhadi Hussein ◽  
Emad Toma Karash
Keyword(s):  
Grain Size ◽  
Surface Treatment ◽  
Structural Properties ◽  
Laser Energy ◽  
Laser Surface ◽  
Powder Technology ◽  
Laser Surface Treatment ◽  
Atomic Force ◽  
Nickel Powders ◽  
Ni Alloy

This research aimed to prepare (Fe-Ni) alloy by powder technology method for its technological and commercial importance. Iron and Nickel powders were tacking then their powders mixed and blended together with percent (63% Fe-37% Ni), then the powders compacted isostatic cold pressure at (6 ton). Laser surface treatment was done for the samples with different energies (0, 200, 260, 300) mJ and pulse time (10 sec) At a distance (100 cm). The X-ray diffractions test indicated that all samples have Face Center Cubic (F.C.C), and the samples at 300 mJ has best properties which include increase of phases intensity and decrease of grain size according to Debye-Scherrer equation. The Atomic Force Microscope (AFM) also shows better properties with increase laser energy. Where increased soft-ness of surface, homogeneity surface and decrease in grain size with increase laser energy. The laser analysis resulted that melting all surface molecules which led to improvement in the structural properties.

Effect of the laser surface treatment on structure and mechanical properties of AlZn 10 Si 8 Mg cast alloy

2017 ◽  
Vol 4 (5) ◽  
pp. 5973-5978
Author(s):  
Eva Tillova ◽  
Maria Chalupova ◽  
Lenka Kucharikova ◽  
Denisa Zavodska ◽  
Juraj Belan
Keyword(s):  
Mechanical Properties ◽  
Surface Treatment ◽  
Cast Alloy ◽  
Laser Surface ◽  
Laser Surface Treatment

scholarly journals Influence of ns-Nd:YAG laser surface treatment on the tensile bond strength of zirconia to resin-matrix cements

2020 ◽  
Vol 46 (17) ◽  
pp. 27822-27831
Author(s):  
Bruno Henriques ◽  
Nathalia Hammes ◽  
Júlio C.M. Souza ◽  
Mutlu Özcan ◽  
Joana Mesquita-Guimarães ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Nd:Yag Laser ◽  
Laser Surface ◽  
Tensile Bond Strength ◽  
Resin Matrix ◽  
Laser Surface Treatment

Nd:YAG laser surface treatment of copper to improve the wettability of Sn3.5Ag solder on copper

2005 ◽  
Vol 200 (7) ◽  
pp. 2181-2186 ◽  
Author(s):  
Zhenqing Zhao ◽  
Chunqing Wang ◽  
Mingyu Li ◽  
Lei Wang
Keyword(s):  
Surface Treatment ◽  
Nd:Yag Laser ◽  
Laser Surface ◽  
Laser Surface Treatment

Improvement in mechanical properties of a Zr-based bulk metallic glass by laser surface treatment

2010 ◽  
Vol 504 ◽  
pp. S45-S47 ◽  
Author(s):  
Bingqing Chen ◽  
Shujie Pang ◽  
Peipei Han ◽  
Yan Li ◽  
Alain R. Yavari ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Surface Treatment ◽  
Bulk Metallic Glass ◽  
Laser Surface ◽  
Laser Surface Treatment

scholarly journals Laser Surface Treatment Effect on Structural Properties for Invar Alloy Type Prepared by Powder Technology

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Omar Fadhil Abdullah ◽  
Orass Abdulhadi Hussein ◽  
Rasha Wael Koleab
Keyword(s):  
Grain Size ◽  
Surface Treatment ◽  
Structural Properties ◽  
Laser Energy ◽  
Laser Surface ◽  
Powder Technology ◽  
Face Centered Cubic ◽  
Laser Surface Treatment ◽  
Face Centered ◽  
Cold Pressure

This research aimed to prepare iron-nickel alloys via powder technology, because this technology has its physical and commercial importance. Fe and Ni powders were blended into a mixture that was 63% Fe and 37% Ni and then compacted under 6 tons of isostatic cold pressure. Iron and nickel powders were used as tacking mixed together (63% of iron and 37% of nickel), and then compacted isostatic cold pressure at 6 tons. Laser surface treatment was done to samples with different energies (0, 200, 260, and 300 mJ) at a pulse time of 10 seconds and a distance of 100 cm. The x-ray diffraction test indicated that all samples had face-centered cubic, and according to the Debye-Scherrer equation. the 300 mJ sample had the best properties, including increased phase intensity and decreased grain size. The atomic force microsope showed that increasing laser energy also decreased grain size and increased surface softness and homogeneity. laser treatment results indicated an improved in structural properties with increased laser energy, Laser analysis revealed that melting all surface molecules improved structural properties. Specifically, the last treatment (300 mJ) acheaved the best structural properties of the alloy.

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