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Journal articles on the topic 'Alloy layer'

Author: Grafiati

Published: 30 May 2022

Last updated: 30 July 2025

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1

Zeng, Yan, Xiao Yang Huang, Wei Dong Zhou, and Sheng Kai Yu. "A Numerical Study on Heat Transfer and Lubricant Depletion on an Anisotropic Multilayer Hard Disk." Applied Mechanics and Materials 232 (November 2012): 770–74. http://dx.doi.org/10.4028/www.scientific.net/amm.232.770.

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This paper presents a numerical investigation on the effect of thermal anisotropy of the top layer alloy on heat transfer and lubricant depletion on the disk surface in a heat-assisted magnetic recording (HAMR) system. The disk consists of multilayer structures and a thin layer of lubricant on the top surface. Cases under different laser powers and initial lubricant film thicknesses are examined. The top-layer alloy thermal anisotropy does show non-negligible effect on the heat transfer and lubricant depletion. With the top-layer alloy being more anisotropic, higher temperature increase and la

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2

Chen, Chang Jun, Qin Cao, Min Zhang, Qing Ming Chang, and Shi Chang Zhang. "Laser Repair Cladding of Ni-Base Alloy on TC2 Ti Alloy." Advanced Materials Research 239-242 (May 2011): 2191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.2191.

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An attempt has been made to fabricate Ni-base alloy layer on the surface of TC2 titanium alloy substrate by laser repair cladding technology for repairing the worn surface of TC2 alloy after in service. Laser cladding is carried out by melting the preplaced Ni-base alloy powder using a continuous wave CO2 laser and using Ar as shielding gas. Microstructure and chemical composition of the cladding coating was revealed by optical microscope (OM), scanning electron microscope (SEM), together with the energy dispersive X-ray spectroscope (EDS). A clad layer with low dilution and metallurgically bo

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3

Liu, N., Y. L. Liu, Z. L. Zhao, H. O. Yang, and W. X. Xu. "The preparation of gradient titanium alloy through laser deposition." IOP Conference Series: Materials Science and Engineering 1270, no. 1 (2022): 012118. http://dx.doi.org/10.1088/1757-899x/1270/1/012118.

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Functionally gradient materials (FGMs) with continuous variation in composition or microstructure can realize gradient properties in different positions of the same component. The layer-by-layer laser deposition additive manufacturing is one of the most promising technologies that prepare FGMs with gradient properties. The present study is focused on the preparation of gradient titanium alloy by laser depositing Ti2AlNb powders on the substrate of a near-α high temperature titanium alloy. The microstructure, composition, and micro-hardness of prepared gradient titanium alloy with and without t

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4

Guo, Yuanhang, Jihong Dong, Zongliang Lv, Yuming Xie, Yongxian Huang, and Xiangchen Meng. "Shoulder-Restricted Friction Deposition for Aluminum Alloy Coatings on Titanium Alloys." Coatings 14, no. 1 (2024): 130. http://dx.doi.org/10.3390/coatings14010130.

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In order to solve the problem of a thin deposition layer on the titanium alloy in the traditional friction surfacing process of dissimilar Ti/Al metals, new shoulder-restricted friction deposition (SRFD) equipment was successfully developed by introducing a restricted shoulder. Using a laser to roughen the titanium substrate, the process verification of Al deposition onto TC4 was realized. The material utilization was close to 100%, and a deposition layer with a thickness of 0.8 mm and a strong bonded interface was obtained. The peel strength of the triple-layer deposited joints was 121 MPa.

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5

He, Qing Kun, Hong Zhi Cui, Shao Hua Huang, Jin Quan Sun, Hong Guang Yang, and Yong Feng Li. "Laser Cladding of Ni-Based Alloy on Mg Alloy with Brass Transition." Materials Science Forum 686 (June 2011): 197–201. http://dx.doi.org/10.4028/www.scientific.net/msf.686.197.

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Laser cladding of Ni-based alloy on Mg-alloy was achieved by using brass as transition layer on substrate. The Ni-based alloy layer free of cracks and porosities was bonded metallurgically with the Mg substrate using brass as the transitional layer. The Ni-based cladding layer was mainly composed of Cr2Ni3, FeNi3, AlNi3 while the content of Mg, Al, Cu and Zn is very low in the cladding layer. Microhardness and the wear resistance of the sample were tested, whose results indicated that microhardness and wear resistance increased 12.8 times and 13.3 times, respectively compared with the substrat

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6

Svéda, Mária, and András Roósz. "Development of Amorphous and Microstructured Surface Layer by Laser Surface Treatment." Materials Science Forum 752 (March 2013): 175–82. http://dx.doi.org/10.4028/www.scientific.net/msf.752.175.

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The aim of the research was to develop an amorphous and microstructured layer on non-amorphous alloys by laser surface treatment. The as-prepared Cu based master alloy ingots were imbedded in a metallic sinking with Wood metal to assure the good thermal conductivity during the laser treatment. The laser remelting, alloying and coating techniques were applied from the laser surface treatment techniques. The surface layer production and a subsequent rapid cooling were performed using CO2 laser and pulse and continuous modes of Nd:YAG laser. The characterization of the microstructure of the resul

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7

Konovodov, D., and V. Nakonechnyi. "AN EXPERIMENTAL INVESTIGATION OF BEHAVIOR OF ALUMINUM AND MAGNESIUM LAYERS DURING THE ROLLING OF THREE-LAYER STRIPS." Modern Problems of Metalurgy, no. 26 (April 23, 2023): 52–60. https://doi.org/10.34185/1991-7848.2023.01.05.

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Modern magnesium alloys have prospects for wide application in the automotive and aerospace industries, where the maximum weight reduction of the structure is of great importance. These alloys have a sufficiently high specific strength. But the magnesium alloys that are used are prone to corrosion, which limits their use. One of the options for increasing corrosion resistance is the use of magnesium alloy strips inside three-layer strips, the outer layers of which consist of strips of another metal or alloy. The non-uniformity of the deformation of the strip during rolling affects the formatio

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8

Yao, Huan, Zhiyong LI, Yingqiao Zhang, et al. "Study on laser cladding system of the high-entropy alloy layer on the AZ91D magnesium." Journal of Laser Applications 34, no. 3 (2022): 032007. http://dx.doi.org/10.2351/7.0000680.

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A new type of composite layer material system, Al4Ni/Al2CrCuFeNi2Ti high-entropy alloy, was designed. The Al4Ni transition layer was prepared on the surface of an AZ91D magnesium alloy by laser cladding, which solves the problem of excessive melting point difference between the magnesium alloy and the high-entropy alloy. The Al4Ni/Al2CrCuFeNi2Ti high-entropy alloy composite layer with good surface formation was successfully prepared on the AZ91D magnesium matrix. Optical microscope, scanning electron microscope, and x-ray diffraction were used to characterize the microstructure and properties

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9

Lin, Yinghua, Haibo Wang, Mingxing Zhang, et al. "Gradient Coating of Laser Cladding TiB2/Ti-Based Alloy on Titanium Alloy Surface." Coatings 13, no. 4 (2023): 743. http://dx.doi.org/10.3390/coatings13040743.

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The technology of the TiB2/TiB cladding layer addresses the issue of the insufficient wear resistance of cup-shaped parts composed of titanium alloy materials. In order to eliminate the cracking problem of laser cladding TiB2/Ti-based alloy, 30%TiB2/Ti-based alloy gradient coating was prepared on the surface of titanium alloy by laser cladding in this study. The results revealed that the microstructure of the matrix and the cladding layer is metallurgically bonded. The microstructures of the cladding layer appear as rod-like and coarse-grained features on the surface, and fine needle-like and

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10

Grigoryev, Alexey, Igor Polozov, Anatoliy Popovich, and Vadim Sufiyarov. "Application of additive technologies for synthesis of titanium alloys of Ti-Al, Ti-Al-Nb systems of elemental powders." SHS Web of Conferences 44 (2018): 00037. http://dx.doi.org/10.1051/shsconf/20184400037.

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Additive technologies are one of the drivers for development of new industrial revolution. For developing additive production it is necessary to expand the nomenclature of materials used in the form of powders. One of the ways for synthesizing new alloys in additive technologies is applying a mixture of powders as primary components; the powders correspond in their composition to the given alloy. The technology of selective laser melting enables synthesizing the necessary alloy by means of layer by layer melting of a powder mixture. A study of the process of Ti-5Al and Ti-6Al-7Nb titanium allo

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11

Wu, Yu, Bingqing Chen, Peixin Xu, Pengjun Tang, Borui Du, and Chen Huang. "Microstructure and Microhardness of High-Strength Aluminium Alloy Prepared Using High-Speed Laser Fabrication." Metals 14, no. 5 (2024): 525. http://dx.doi.org/10.3390/met14050525.

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As a recently developed high-strength aluminium alloy used specifically for laser additive manufacturing, AlMgMnSc alloy possesses superior mechanical properties and excellent processability. Extreme high-speed laser deposition (EHLD) is a novel surface-modification technique, which is characterised by high depositing speed, rapid cooling, rate and minimal dilution rate. To offer a new method for surface repairing high-strength aluminium alloys, an AlMgMnSc alloy coating, containing two deposition layers, is prepared on a 6061 aluminium-alloy axle using the EHLD technique. Meanwhile, the micro

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12

Kovaleva, M. G., M. N. Yapryntsev, S. V. Naumov, et al. "Study of structured pulsed laser surface treatment of the Ti6Al4V alloy." Laser Physics 35, no. 5 (2025): 055601. https://doi.org/10.1088/1555-6611/ada75a.

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Abstract Titanium and titanium alloys are widely used in aerospace, automotive and medical implants. In recent years, laser processing has attracted attention as a method to modify the surface properties of these alloys to improve their mechanical, chemical and biological properties. In this study, we present experimental data on the structure, chemical composition and morphology of titanium alloy Ti–6Al–4 V after laser processing. The Fiber Lasers IPG YLM-QCW-100 was used. The material was studied in order to better understand the nature of laser melting and laser-assisted ablation of the sur

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13

Zhang, Chao, Jianjun Song, and Jie Zhang. "Optimization of Laser Recrystallization Process for GeSn Films on Si Substrates Based on Finite Difference Time Domain and Finite Element Method." Journal of Nanoelectronics and Optoelectronics 15, no. 3 (2020): 376–83. http://dx.doi.org/10.1166/jno.2020.2705.

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GeSn alloy on Si substrate has the advantages of high carrier mobility, high radiation recombination efficiency, compatibility with the Si process, and is widely used in the field of semiconductor optoelectronics. However, due to the high lattice mismatch between the GeSn epitaxial layer and the Si substrate, how to prepare a perfect GeSn film on the Si substrate is an issue. The 808 nm continuous wave laser recrystallization technology can significantly improve the quality of the GeSn alloy epitaxial layer by melting and recrystallization, which provide another technical way for solving this

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14

Wang, Qiang, Pu Song, Wenjuan Niu, Nan Li, and Ning Hu. "High Temperature Oxidation Behavior of Additive Manufactured Ti6Al4V Alloy with the Addition of Yttrium Oxide Nanoparticles." Materials 17, no. 11 (2024): 2544. http://dx.doi.org/10.3390/ma17112544.

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Titanium alloys face challenges of high temperature oxidation during the service period when used as aircraft engine components. In this paper, the effect of Y2O3 addition on the oxidation behavior and the microstructural change of the Ti6Al4V alloy fabricated by selective laser melting (SLM) was comprehensively studied. The results show that the surface of the Ti6Al4V alloy is a dense oxide layer composed of TiO2 and Al2O3 compounds. The thickness of the oxide layer of the Ti6Al4V increased from 59.55 μm to 139.15 μm. In contrast, with the addition of Y2O3, the thickness of the oxide layer in

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15

Morishige, Taiki, Satoki Takiyama, Yuka Ichigi, and Toshihide Takenaka. "Optimization of Anodizing Condition for Mg-14mass%Li-3mass%Al Alloy." Materials Science Forum 1106 (December 5, 2023): 9–13. http://dx.doi.org/10.4028/p-1nnrqr.

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Mg-Li system alloys also has excellent cold-workability compared to commercial hcp-structured Mg alloys. However, Mg-Li alloys have poor corrosion resistance because not only that is Mg-based alloy but Li as a major alloying element is a less noble metal. For example, Mg-Li alloy sheet indicates high corrosion rate and exfoliation corrosion as a result of long-term corrosion test. The authors reported Mg-14 mass%Li-3 mass%Al alloy has the highest corrosion resistance in β-type solid solution alloy. Even though the optimized alloy composition, the alloy does not have enough corrosion resistance

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16

Sato, Hisashi, Yuichi Kubota, Eri Miura-Fujiwara, and Yoshimi Watanabe. "Effects of Phase Transformation Temperature on Formation of Wear-Induced Layer in Fe-Ni Alloys." Materials Science Forum 654-656 (June 2010): 1227–30. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1227.

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Effects of the transformation temperature on formation behavior of the wear-induced layer in Fe alloys are investigated using Fe-33mass%Ni and Fe-30mass%Ni alloys. Martensitic transformation temperature (Ms) and reverse transformation temperature (As) of Fe-33mass%Ni alloy are lower than those of Fe-30mass%Ni alloy. Microstructure of the wear-induced layer in Fe-33mass%Ni alloy was single austenite phase (γ) with fine grain. On the other hand, the wear-induced layer in Fe-30mass%Ni alloy consists of martensite (α’) and γ with fine structure. This difference is due to the difference of As betwe

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17

DUDEK, KAZIMIERA, WOJCIECH SZCZYPINSKI-SALA, and JANUSZ LUBAS. "INFLUENCE OF LASER BORIDING ON THE FRICTION AND WEAR OF SLIDING COUPLES WITH BEARING ALLOYS." Surface Review and Letters 27, no. 01 (2019): 1950084. http://dx.doi.org/10.1142/s0218625x19500847.

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The present study discusses the influence of laser borided surface layer on the parameters of sliding couples lubricated by engine oil. The borided layer was created by laser remelting of a surface layer of steel samples coated with amorphous boron. The study of friction, wear, and lubrication was conducted on the pairs made of steel AISI 5045 and SAE-783 and SAE-48 bearing alloys which were lubricated with 15W/40 engine oil. The research showed important differences in the friction coefficient and temperature in the tested couple with laser borided surface layer. In the couples containing the

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18

Zhang, Yuan Bin, Huai Xue Li, and Kai Zhang. "Investigation of the Laser Melting Deposited TiAl Intermetallic Alloy on Titanium Alloy." Advanced Materials Research 146-147 (October 2010): 1638–41. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1638.

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To improve the wear resistance of Titanium alloy, TiAl intermetallic claddings were fabricated on TC4 substrate using laser melting deposition technology. Optical microscope, scan electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction meter were applied to investigate the deposited TiAl layer and their interface with substrate. Using hardness tester and M-2000 wear testing machine, hardness, frictional coefficient and wear resistance of the TiAl layers and TC4 alloy were tested. It was indicated that the deposited TiAl layers were well integrated with TC4 substra

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19

Ohno, H., Y. Araki, and K. Endo. "ESCA Study on Dental Alloy Surfaces Modified by Ga-Sn Alloy." Journal of Dental Research 71, no. 6 (1992): 1332–39. http://dx.doi.org/10.1177/00220345920710061101.

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A new, simple surface modification method for adherend metals has been developed. It gives high bond strength and superior water durability to dental precious-metal alloys bonded with 4-META/ MMA-TBB resin. However, there was no effect on the bonding of Ag-In-Zn alloy and base-metal alloys. In the present study, the alloy surfaces modified by the new method were analyzed by ESCA and SEM for determination of details of the modification effect. A new alloying layer containing Ga and Sn was formed on the precious-metal alloys. The main factor for excellent adhesion to be achieved was the formatio

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20

Fan, Fei, Hao Sun, Di Zhao, and Jiang Bo Sha. "Effect of Mo on the High Temperature Oxidation Behavior of Co-Al-W Based Alloys." Materials Science Forum 747-748 (February 2013): 754–59. http://dx.doi.org/10.4028/www.scientific.net/msf.747-748.754.

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2 at.% and 4 at.% Mo were added to Co-9Al-9W-2Ta-0.02B alloy to replace W (hereafter referred to as the alloys of 2Mo and 4Mo, respectively; Mo-free alloy was referred to as the 0Mo alloy). The effects of Mo additions on the high temperature oxidation behavior of the alloys at 800 °C in air have been studied. The results indicated that, after oxidation in air at 800 °C for 100 h, the oxide film of the 0Mo alloy remained intact, but the cracking and spallation of the oxide film took place in the alloys of 2Mo and 4Mo. Oxidation kinetic curves revealed weight gain per unit area of the 0Mo alloy

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Bhola, Rahul, and Brajendra Mishra. "Characterization of a Biomedical Titanium Alloy Using Various Surface Modifications to Enhance its Corrosion Resistance and Biocompatibility." Materials Science Forum 706-709 (January 2012): 105–12. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.105.

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Ti6Al4V titanium alloy has been characterized for its prospective applications as an implant material. The surface treatments performed have brought about enhanced surface properties of these alloys and have produced corrosion resistant oxide films with increased bioactive properties. Characterization of the alloy surface has revealed the presence of a duplex oxide structure over the surface treated specimens, composed of an inner barrier layer and an outer porous layer. The inner barrier layer has imparted a high corrosion resistance to the alloy while the outer porous layer which is responsi

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Fu, Guang Yan, Xin Zhao, Qun Liu, and Yong Su. "Hot Corrosion of Cobalt-Based Alloy with (Na, K)₂SO₄ Coating at 900 °C." Advanced Materials Research 194-196 (February 2011): 1305–8. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1305.

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The hot corrosion behavior of pure Co, Co-10Cr and Co-10Cr-5Al alloys coated with (4～4.5) mg/cm2 (Na, K)2SO4 deposits has been studied at 900 °C in air by thermogravimetry and SEM/EDX analysis. The results show that hot corrosion rate of Co-10Cr alloy was obviously higher than that of Co-10Cr-5Al alloy and hot corrosion rate of pure Co was between those of the two cobalt-based alloys. Both alloys produced complex corrosion scales, containing an outermost layer of pure cobalt oxide and an inner layer where the oxides of both alloy components were simultaneously present on the Co-10Cr alloy, whi

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23

Svéda, Mária, Dóra Janovszky, K. Tomolya, J. Sólyom, G. Buza, and A. Roósz. "Nanostructure Layer Formation on Cu-Zr-Al Alloy during Laser Remelting." Materials Science Forum 729 (November 2012): 272–77. http://dx.doi.org/10.4028/www.scientific.net/msf.729.272.

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This paper reports laser remelting of crystalline Cu based alloys in order to produce amorphous layer on the surface. The as prepared Cu based master alloy ingots were imbedded in a metallic sinking with Wood metal to assure the good thermal conductivity during the laser treatment. The laser remelting of a thin surface layer and a subsequent rapid cooling of it was performed using impulse and continuous mode of Nd:YAG laser. In respectively the impulse mode the laser power and the interaction time were 1.5; 2 kW and 20÷100 ms. In the continuous mode the laser power was 2 kW, and the laser scan

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Liu, Weidong, Lei Li, Guofa Mi, Jincai Wang, and Yujia Pan. "Effect of Fe Content on Microstructure and Properties of Laser Cladding Inconel 625 Alloy." Materials 15, no. 22 (2022): 8200. http://dx.doi.org/10.3390/ma15228200.

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Dilution rate is one of most important factors influencing the microstructure and performance of the laser cladding layer. In order to obtain a reasonable dilution rate in the laser cladding layer of Inconel 625 alloy, the laser cladding layers with different Fe content were prepared on the surface of 20# steel by the laser cladding technique. The influence of Fe content on the microstructure and performance of Inconel 625 alloy cladding layer was investigated. The results indicate that with the increase in Fe content in the alloy, the grain size of the cladding layer becomes coarser, the grai

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Ye, Xiaoyang, Mingxing Ma, Wenjin Liu, et al. "Synthesis and Characterization of High-Entropy Alloy FeCoNiCuCr by Laser Cladding." Advances in Materials Science and Engineering 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/485942.

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High-entropy alloys have been recently found to have novel microstructures and unique properties. In this study, a novel FeCoNiCuCr high-entropy alloy was prepared by laser cladding. The microstructure, chemical composition, and constituent phases of the synthesized alloy were characterized by SEM, EDS, XRD, and TEM, respectively. High-temperature hardness was also evaluated. Experimental results demonstrate that the FeCoNiCuCr clad layer is composed of only BCC and FCC phases. The clad layers exhibit higher hardness at higher Al atomic content. The AlFeCoNiCuCr clad layer exhibits increased h

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Cai, Xun, Xiaoyu Yang, Tao Zhao, Liuhe Li, and Qiu Long Chen. "Laser Surface Cladding of Al-Si Alloy." Key Engineering Materials 297-300 (November 2005): 2813–18. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2813.

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The mixture of Ni based alloy powder and WC particles were used as a feeding material to modify the surface properties of cast Al-Si alloy using a CO2 continuous transverse flow laser beam with maximum power of 10 kW. Microstructures and chemical components of the laser surface cladding (LSC) layers were studied using SEM, XRD, TEM and EDS. It is shown that the LSC layers were composed of γ-（ Ni, Cr, Fe, W）matrix phase and many enhancing phases, such as Ni2Al3, Ni3Al, WC, W2C, Cr2B, etc.. The microstructure of the LSC layers was greatly affected by the scanning rate b V and the powder of feedi

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Chen, Jingrun, Jing Zhang, Ke Li, et al. "Microstructure and Properties of Laser Surface Remelting AlCoCrFeNi2.1 High-Entropy Alloy." Metals 12, no. 10 (2022): 1590. http://dx.doi.org/10.3390/met12101590.

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In this study, laser surface remelting of an AlCoCrFeNi2.1 high-entropy alloy was performed using a Yb:YAG laser. The effects of laser surface remelting on the phase structure, microstructure, Vickers hardness, frictional wear properties, and corrosion resistance of the high-entropy alloy were investigated. The remelted layer of the AlCoCrFeNi2.1 high-entropy alloy was produced by remelting at 750 W laser power and formed a good metallurgical bond with the substrate. The X-ray diffraction results showed that the 750 W remelted layer consisted of face-centered cubic and body-centered cubic phas

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Hirose, Akio, Fumiaki Matsui, Hirotaka Imaeda, and Kojiro F. Kobayashi. "Interfacial Reaction and Strength of Dissimilar Joints of Aluminum Alloys to Steels for Automobile." Materials Science Forum 475-479 (January 2005): 349–52. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.349.

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In the present study, we fundamentaly analyzed the interfacial reaction and evaluated the joint strength in dissimilar diffusion bonding of Al alloys to steels. The growth of the reaction layer consisting of FeAl3 and Fe2Al5 intermetallic compounds followed the parabolic growth low. The joints with 5000 series Al alloys had a higher growth rate of the reaction layer than the joints with A6061 Al alloy. The joints of A6061 Al alloy to HT980steel had the lowest growth rate of the reaction layer. The joint strength depended on the thickness of the reaction layer. The A6061 Al alloy/steel joints h

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Lv, Hao, Zhijie Li, Xudong Li, Kun Yang, Fei Li, and Hualong Xie. "Effect of Vanadium Content on the Microstructure and Mechanical Properties of IN718 Alloy by Laser Cladding." Materials 14, no. 9 (2021): 2362. http://dx.doi.org/10.3390/ma14092362.

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Microalloying vanadium can change the segregation state of Nb element in IN718 alloy, reduce the formation of harmful Laves phase and refine the dendritic structure of IN718 alloy during the laser process. Therefore, IN718 alloys with V content from 0.081 to 1.88 wt.% were prepared and evaluated. Metallographic microscopy and scanning electron microscopy were used to observe the corresponding morphology, structure, and distribution of elements. First of all, it was found that the addition of V refines the grain size of IN718 alloy and reduces the primary dendrite arm spacing. Secondly, adding

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You, Ming Lin. "The Effect of Laser Processed Nano-SiC-Ni Metal Ceramic on the Surface Properties of the Iron-Based Material." Applied Mechanics and Materials 52-54 (March 2011): 953–58. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.953.

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In this article, we have carried out the Ni based self fluxing alloy powder and studied the effect on the laser alloying of 45steel layer which contains different weight percentage of nano-SiC powders. Experimental results show that the alloy layer which obtained by the optimized laser alloying process parameters (I = 38A, V = 100 mm / min, Δf=10mm, Ar gas protection) is smoothness, fineness, hardness and have a good metallurgical bonding. The test of tribological wear experiments shows that the wear capability of Ni-based powder made of laser alloyed layer is more excellent than that of the h

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Zhang, Chun Hua, Yu Xi Hao, Lin Qi, Fang Hu, Song Zhang, and Mao Cai Wang. "Preparation of Ni-Base Alloy Coatings on Monel Alloy by Laser Cladding." Advanced Materials Research 472-475 (February 2012): 313–16. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.313.

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Abstract. The paper presents the results of a study concerned with the surface hardening of Inconel 625 alloys and Ni-base alloy powder on Monel alloy by electro spark deposition and laser cladding processes. The microstructure, the phase composition and the microhardness of samples are investigated by SEM, EDS, XRD and microhardness instrument. It is shown that, the matrix phase is mainly made up of dendritic structure (γ-Ni), interdendritic eutectic phase (Ni3(B,Fe,Si)) and some precipitates (Cr7C3, Cr23C6). Additional, the microhardness of laser cladding layer can be substantially increased

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Zhao, X. R., Dun Wen Zuo, H. Cheng, Q. T. Li, S. Dai, and S. S. Feng. "Microstructure and Properties of Laser Cladding Co-Based Alloy Layer." Advanced Materials Research 764 (September 2013): 47–53. http://dx.doi.org/10.4028/www.scientific.net/amr.764.47.

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The Co-base alloy laser cladding layer was coated on the 2738 mold steel surface by using the TJ-HL-5000 transverse-flow CO2 continuous laser. The morphology and hardness were investigated by metallography microscope, scanning electron microscopy (SEM), X-ray diffraction (XRD) and microhardness tester. The metallography microscope and SEM investigations show that from interface to surface along the cross section direction, the cladding layers consist of plane crystal layer, columnar crystal layer, dendrites layer and surface cellular crystal layer, respectively. XRD results indicate that the c

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Zhang, Chun Hua, Li Wen Tang, Fang Hu, Song Zhang, and Hau Chung Man. "Study on Wear and Corrosion Properties of Ti6Al4V Alloy by Laser Gas Nitriding." Advanced Materials Research 299-300 (July 2011): 188–92. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.188.

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Titanium alloys have successfully been used as surgical implants. Laser gas nitriding (LGN) is an effective method to improve the wear and corrosion resistance of titanium alloys. A nitride strengthened uniform layer, free of cracks, was obtained on the Ti6Al4V alloy by irradiating with a continuous wave Nd-YAG laser in a N2environment. The microstructure, electrochemical corrosion and tribological behavior of the alloy before and after LGN were studied by SEM, XRD, potentiostat, microhardness tester and tribometer. The results show that the performance and composition of the surface of the Ti

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Ogura, Tomo, Syunsuke Netsu, Tetsuya Yokochi, and Kazuyoshi Saida. "Dissimilar Metal Joining of A5052 Aluminum Alloy and AZ31 Magnesium Alloy Using Laser Brazing." Materials Science Forum 879 (November 2016): 2532–36. http://dx.doi.org/10.4028/www.scientific.net/msf.879.2532.

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The microstructure and mechanical properties of a joint produced by laser brazing between A5052 and AZ31 with AZ61, AZ91 and AZ125 filler metal was investigated. The effects of filler metals on joint characteristics are also discussed. Measurement of microstructural factors in the laser brazed joint revealed that increasing the laser power results in a decrease in the weld toe angle and an increase in the bead width, which indicates superior wettability. A high strength laser brazed joint can be achieved through the combination of good wettability and a thin intermetallic layer produced by a l

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35

Aishwarya, J., M. Nithin Kumaar, Vaira Vignesh Ramalingam, and M. Govindaraju. "Sandwich composite of aluminum alloy and magnesium alloy through accumulative roll bonding technique." Metallurgical and Materials Engineering 28, no. 2 (2022): 257–68. http://dx.doi.org/10.30544/761.

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Aluminum and magnesium alloys are lightweight materials with outstanding technical uses. Due to their combined qualities, composites built of aluminum and magnesium alloys have surpassed the utilization of these elements individually. Accumulative Roll Bonding was used to create a three-layered sandwich composite structure made of Al-alloy/Mg-alloy/Al-alloy. The composite structure's microstructure and mechanical characteristics were studied. A fine-grained AZ31 layer was formed, according to the microstructural study. At the Al-alloy/Mg-alloy contact, a diffusion layer was also seen. On the b

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Liu, Huihui, Xichen Lin, Xinjian Zhang, Tiancheng Yang, Fenglin Yi, and Weiye Xu. "Influence of structure and properties for laser cladding fe based alloy on 45 steel surface." Journal of Physics: Conference Series 2730, no. 1 (2024): 012014. http://dx.doi.org/10.1088/1742-6596/2730/1/012014.

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Abstract This article uses 45 steel as the substrate and iron based alloy powder as the cladding material for mining machinery equipment. Laser cladding experiments were conducted without scanning speed to prepare 45 steel surface cladding iron based alloy layer samples. The samples were subjected to microstructure analysis, hardness, and acid corrosion resistance testing. The results show that the microstructure of the laser cladding layer is a fine-grained equiaxed crystal structure, and the hardness of the cladding layer is higher than that of the substrate. The corrosion rate of the claddi

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Pakieła, Wojciech, Tomasz Tański, Krzysztof Labisz, Katarzyna Pakieła, and Zbigniew Brytan. "Structure and Mechanical Properties of Composite Layers Prepared by Laser Alloying of Aluminium Alloy." Solid State Phenomena 275 (June 2018): 53–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.275.53.

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Increasingly high expectations for modern engineering, make the constantly being sought-after new processes giving traditional materials new, better features. Nowadays, next to the classic heat treatments, advanced technologies are being used increasingly, leading to much better results than ever before. The most commonly used technologies that allow for obtaining new, enhanced properties of various metal alloys in the area of surface engineering include, among others laser surface treatment. The main objective of this paper was to analyze the influence of laser surface treatment on structural

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Fei, Jixiong, Guoliang Liu, Kaushalendra Patel, and Tuğrul Özel. "Effects of Machining Parameters on Finishing Additively Manufactured Nickel-Based Alloy Inconel 625." Journal of Manufacturing and Materials Processing 4, no. 2 (2020): 32. http://dx.doi.org/10.3390/jmmp4020032.

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Metal additive manufacturing processes such as selective laser melting (SLM), laser powder bed fusion (L-PBF), electron beam melting (EBM) and laser metal deposition (LMD) can produce additively manufactured nearly fully dense parts with high geometrical complexity. These are often used as components in automotive, aerospace and medical device industries. Finish machining of these components is required to achieve the desired surface finish and dimensional tolerances. The investigations on additively manufactured alloys, as reported in the literature, indicate that a layer-wise scan strategy (

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Yan Ruifeng, 颜瑞峰, 郭亮 Guo Liang, 张庆茂 Zhang Qingmao, 周永恒 Zhou Yongheng, and 张健 Zhang Jian. "Laser Cladding Co-Based Alloy Layer on AZ91D Magnesium Alloy and Properties." APPLIED LASER 32, no. 3 (2012): 175–79. http://dx.doi.org/10.3788/al20123203.175.

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Li, Xiang, Shan Huang, Jianping Tang, Weihao Mu, Xin Xu, and Xuehui Chen. "Effects of Laser Machining Aluminum Alloy in Different Media." Micromachines 13, no. 7 (2022): 1130. http://dx.doi.org/10.3390/mi13071130.

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To study the effects of aluminum alloys processed by a laser in air and water and at different water velocities, corresponding experiments were conducted and the impacting effects of different water velocities on the surface of the workpiece were simulated, respectively. The results show that when laser processing aluminum alloy materials in air, there is more slag and a recondensation layer on both sides of the groove, the heat-affected zone is larger and the surface processing quality is poor. When laser processing aluminum alloy materials in water, the processing quality is improved. With t

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Enomoto, Masatoshi, Sadao Kokubo, and Kazuhiro Nakata. "Surface Treatment of Aluminum Alloy with Laser Irradition to Increase Wear Resistance." Materials Science Forum 539-543 (March 2007): 404–10. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.404.

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Laser irradiating process with Nd-YAG laser is investigated in order to improve the adhesion and wear resistance of low pressure plasma sprayed layer on the surface of aluminum extruded shape using the atomized powder of Al-50mass%Fe, Al-15mass%Fe-17mass%Si and Al-50mass%Si. The effect of pulse energy of laser beam on the microstructure, micro hardness and wearing rate of these laser irradiated layers are evaluated. Laser irradiated layers have appeared more smooth surface and better adhesion than as sprayed layer. Depth profile of micro hardness where laser irradiated is respectively kept con

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Oyane, Ayako, Ikuko Sakamaki, Kenji Koga, and Maki Nakamura. "Formation of a Calcium Phosphate Layer with Immobilized Cobalt Chromite Nanoparticles on Cobalt−Chromium Alloy by a Laser-Assisted Biomimetic Process." Applied Sciences 10, no. 16 (2020): 5584. http://dx.doi.org/10.3390/app10165584.

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The biocompatibility and osteoconductivity of metallic biomaterials can be achieved by calcium phosphate (CaP) coating. We recently developed a laser-assisted biomimetic (LAB) process for rapid and area-specific CaP coating on several materials. In the present study, the LAB process was applied to cobalt–chromium (Co−Cr) alloy, a metallic biomaterial widely used in orthopedic and dental applications. The LAB process was conducted by irradiation of unfocused pulsed laser light onto the substrate immersed in supersaturated CaP solution. The LAB-processed substrate formed CaP on the irradiated su

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Saprykina, Natal'ya, Aleksandr Saprykin, Egor Ibragimov, and Margarita Himich. "MODE INFLUENCE OF SELECTIVE LASER IMPACT UPON POROSITY OF SAMPLES OF COBALT, CHROMIUM AND MOLYBDENUM POWDERS." Bulletin of Bryansk state technical university 2021, no. 8 (2021): 22–28. http://dx.doi.org/10.30987/1999-8775-2021-8-22-28.

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The purpose of this investigation consists in the analysis of possibility to obtain products by means of the SLP method using powders of cobalt, chromium and molybdenum having considerable difference in melting temperatures of cobalt (1768ºC), chromium (2130ºC) and molybdenum (2890ºC), density, thermal conduction and solving for the optimum technological modes of powder composition melting to obtain samples with lower porosity.  The investigation methods include methods of physical material science.  Investigation results and novelty: a procedure for obtaining a powder composite of

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LotfiNeyestanak, Ali Akbar, and Saeed Daneshmand. "The Effect of Operational Cutting Parameters on Nitinol-60 in Wire Electrodischarge Machining." Advances in Materials Science and Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/457186.

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Shape memory alloys are a kind of active materials, which have significant characteristics in comparison with other alloys. Since these materials are applicable in different fields such as aerospace, automobile industry, medicine, and dentistry, the effects of wire electrodischarge machining on the properties of these alloys have been studied. In this paper, changes in the shape recovery ability and microhardness of the machined surface of Nitonol-60 shape memory alloy have been studied considering recasting and formation of resolidificated layer on the shape memory alloy surface. XRD and EDXA

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Lee, Seong-Hee. "Microstructural Changes with Annealing of a Nanostructured Al Alloy Severely Plastic Deformed by Four-Layer Stack Accumulative Roll-Bonding Process." Journal of Nanoscience and Nanotechnology 20, no. 7 (2020): 4419–22. http://dx.doi.org/10.1166/jnn.2020.17549.

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Microstructural changes with annealing of a nanostructured complex aluminum alloy fabricated by 3 cycles of four-layer stack ARB process using different Al alloys were investigated in detail. The four-layer stack ARB process using AA1050, AA5052 and AA6061 alloy sheets was performed up to 3 cycles without a lubricant at room temperature. The sample fabricated by the ARB is a multi-layer aluminum alloy sheet in which the AA1050, AA5052 and AA6061 aluminum alloys are alternately stacked to each other. The layer thickness of each alloy became thinner and elongated to the rolling direction with th

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Xu, Zhidong, Dengzhi Wang, Wenji Song, et al. "Microstructure and Wear of W-Particle-Reinforced Al Alloys Prepared by Laser Melt Injection." Micromachines 13, no. 5 (2022): 699. http://dx.doi.org/10.3390/mi13050699.

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W-particle-reinforced Al alloys were prepared on a 7075 aluminum alloy surface via laser melt injection to improve their wear resistance, and the microstructure, microhardness, and wear resistance of the W/Al layers were studied. Scanning electron microscopy (SEM) results confirmed that a W/Al laser melting layer of about 1.5 mm thickness contained W particles, and Al4W was formed on the surface of the Al alloys. Due to the reinforcement of the W particles and good bonding of the W and Al matrix, the melting layer showed excellent wear resistance compared to that of Al alloys.

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Zhang, Yan Li. "Study on the Laser Alloy Cladding for Re-Manufacturing of the Surface of 40Cr." Applied Mechanics and Materials 713-715 (January 2015): 2900–2904. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.2900.

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The laser alloy cladding technology is used to treat the surface of 40Cr, and the two alloy powders are used separately. The process parameters are different, such as laser power, feed rate and scanning speed etc. The microstructure and hardness of cladding layers are analyzed by using scanning electron microscope and hardness tester. Generally, the surface quality is improved apparently. Under the similar laser power and powder quantity, the thickness of Ni60 cladding layer is much larger than Fe60. The hardness of Ni60 layer and Fe60 layer are all higher than substrate. There are more cracks

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Voropaev, Alexander, Maxim Stramko, Alexander Sorokin, Ivan Logachev, Mikhail Kuznetsov, and Sergey Gook. "Laser welding of Inconel 718 nickel-based alloy layer-by-layer products." Materials Today: Proceedings 30 (2020): 473–77. http://dx.doi.org/10.1016/j.matpr.2019.12.399.

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Saraeva, Irina N., Alena A. Nastulyavichus, Islam V. Sozaev, et al. "Sub-picosecond laser surface modification of Ti–Ni alloy and its antibacterial activity." Laser Physics Letters 20, no. 11 (2023): 115602. http://dx.doi.org/10.1088/1612-202x/acfd93.

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Abstract Surface modification of titanium nickelide (Ti–Ni) alloy improves its properties, forming a barrier oxidized/carbonized subsurface layer, which blocks the release of toxic nickel ions. We have modified Ti–Ni alloys by structuring the surface with sub-picosecond laser at different radiation parameters. The modified surface was characterized using scanning electron microscopy and layer-by-layer energy dispersive x-ray spectroscopy. The antibacterial properties of structured surfaces were tested against the planktonic culture of Staphylococcus aureus, and the viability was measured by ‘L

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Zhu, Shichao, Wenliang Chen, Xiaohong Zhan, Liping Ding, and Junjie Zhou. "Parameter optimisation of laser cladding repair for an Invar alloy mould." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 8 (2018): 1859–71. http://dx.doi.org/10.1177/0954405418805653.

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Laser cladding repair is an advanced technology for repairing Invar alloy moulds; however, the influences of various processing parameters on the quality of the Invar alloy moulds have yet to be determined. To explore the optimisation of laser cladding repair parameters, analyses of the geometric features and microstructure of the cladding layer were conducted. First, the influences of different powder feeding rates and scanning speeds on the dilution rate of the substrate were investigated by establishing a mathematical model of the laser power attenuation. Next, the influences of the paramet

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