Wear resistance of a laser surface alloyed Ti–6Al–4V alloy

Jiang, Pei-Cheng; He, Xiuli; Li, X.X; Yu, Ligen; Wang, H.M

doi:10.1016/s0257-8972(00)00680-0

Cited by 161 publications

(53 citation statements)

References 6 publications

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“…After laser nitriding, a hard composite layer with low friction coefficient is generally obtained after solidification [6]. The microstructure varies with processing parameters and normally comprises of fine nitride needles or dendrites embedded in a nitrogen-rich titanium matrix [7].…”

Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Liu

Shangguan

et al. 2016

Appl. Phys. A

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Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti-5Al-5Mo-5V-1Cr-1Fe (TC18) alloy fabricated by laser melting deposition (LMD) has been investigated to improve on wear resistance of laser melting deposited titanium alloy. The microstructure, wear morphology, hardness and wear rate were examined for the unmodified, laser-nitrided and thermal oxidationtreated LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy. As compared to a/b basket weave microstructure with fine lamellar a (hcp) observed on the unmodified LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy, Ti, Ti 2 N and TiN were formed on the LMD specimens after laser nitriding. After thermal oxidation, a surface layer composed of rutile TiO 2 was formed on the LMD specimens along with coarsening of a lath. The increase in hardness and wear resistance of the lasernitrided LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy is attributed to hard dendritic TiN formed on the specimens. The wear rate of the thermal oxidation-treated LMD specimens was \1 % of that of the unmodified LMD specimens when hardness of the former was twice as much as the latter. The superior sliding wear resistance of the thermal oxidationtreated LMD specimens is attributed to the presence of the lubricious rutile oxide layer and hardened diffusion zone.

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Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Liu

Shangguan

et al. 2016

Appl. Phys. A

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“…Laser alloying techniques such as nitriding are known to produce uncontrollable cracks, poor result reproducibility and non-homogeneous weak layers due to the complexity in dissolving the material uniformly in the melted pool [15]. Advantages presented by laser surface melting compared to other surface modification techniques include: superior bonding, reduced distortion, improved physical properties (hardness and wear), and easier control over depth of processing [16,17]. Ti6A1-4V was of interest in this study due to its workability and the ability to produce refined microstructures which are otherwise unachievable in other titanium alloys [18,19].…”

Section: Introductionmentioning

confidence: 99%

High speed laser surface modification of Ti–6Al–4V

Chikarakara

Naher

Brabazon

2012

Surface and Coatings Technology

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Titanium and its alloys have been commonly used for biomedical implant applications for many years; however, associated high coefficient of friction, wear characteristics and low hardness have limited their long term performance. This article investigates the effects of the high speed laser surface modification of Ti6A1-4V on the microstructure, surface roughness, meltpool depth, phase transformation, residual strain, microhardness, and chemical composition. Laser treatment was carried out using a 1.5 kW CO 2 laser in an argon gas environment. Irradiance and residence time were varied between 15.7 to 26.7 kW/mm 2 and 1.08 to 2.16 ms respectively. Laser treatment resulted in a 20 to 50 pm thick surface modified layer without cracks. An increase in residence time and irradiance resulted in higher depth of processing. Surface roughness was found to decrease with increase in both irradiance and residence time. Metallography showed that a martensite structure formed on the laser treated region producing acicular a-Ti nested within the aged p matrix. The laser treatment reduced volume percentage of p-Ti as compared to the non-treated surface. Lattice stains in the range of 0.81% to 0.91% were observed after laser surface modification. A significant increase in micro-hardness was recorded for all laser treated samples. Microhardness increased up to 760 HV 0 . 05 which represented a 67% increase compared to the bulk material. Energy Dispersive X-ray Spectroscopy (EDS) analysis showed that laser surface modification produced a more homogenous chemical composition of the alloying elements compared to the untreated bulk metal.

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“…In the same way, laser surface alloying (LSA) [7,8] and laser surface melting (LSM) [9] have been 4 found to be workable techniques for increasing the wear resistance of metals. Naturally, much research has revealed that laser surface hardening (LSH) [10][11][12][13] effects considerable increases in the wear resistance of metals.…”

Section: Introductionmentioning

confidence: 99%

A comparative investigation of the wear characteristics of a high power diode laser generated single-stage and commercial epoxy tile grout

Lawrence

Edwards

et al. 2002

Wear

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A comparative study of a single-stage ceramic tile grout, generated using a 60 W high power diode laser (HPDL), and a commercially available tile grout has determined the wear characteristics of the two materials. Within both normal and corrosive environmental conditions, the single-stage ceramic tile grout proved to have a superior wear rate over the epoxy tile grout, 0.9 mg/cm 2 /h compared with 125 mg/cm 2 /h when in an HNO 3 environment respectively. Likewise, life assessment testing revealed that the single-stage ceramic tile grout gave an increase in wear life of 4 to 42 times over the commercially available epoxy tile grout, depending upon the corrosive environment. It is believed that the economic and material benefits to be gained from the deployment of such an effective and efficient means of sealing ceramic tiles could be significant.

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Wear resistance of a laser surface alloyed Ti–6Al–4V alloy

Cited by 161 publications

References 6 publications

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

High speed laser surface modification of Ti–6Al–4V

A comparative investigation of the wear characteristics of a high power diode laser generated single-stage and commercial epoxy tile grout

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