Statistical analysis and optimization of process parameters in Ti6Al4V laser cladding using Nd:YAG laser

Sun, Yuwen; Hao, Mingzhong

doi:10.1016/j.optlaseng.2012.01.018

Cited by 214 publications

(53 citation statements)

References 17 publications

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“…This correlates with the productivity of machines and the costs of repair processes. To cover all repair cases a flexible and robust process chain consisting of inspection, repair and remanufacturing technologies as well as quality control is needed [18,160]. Additionally, mobile technologies offer advantages compared to stationary technologies, because there is no need for disassembling and transportation of damaged parts.…”

Section: Repair Technologiesmentioning

confidence: 99%

Continuous maintenance and the future – Foundations and technological challenges

et al. 2016

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Section: Repair Technologiesmentioning

confidence: 99%

Continuous maintenance and the future – Foundations and technological challenges

et al. 2016

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“…This factor is bounded between 0 and 1. The quality function could be described as: lower-the-better, higher-the-better, and nominal-the-best [21]. The desirability function for multi-response optimization in same time can be expressed as:…”

Section: Process Parameter Optimization and Confirmationmentioning

confidence: 99%

Parametric Study and Multi-Criteria Optimization in Laser Cladding by a High Power Direct Diode Laser

Farahmand

Kovacevic

2014

Lasers Manuf. Mater. Process.

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In laser cladding, the performance of the deposited layers subjected to severe working conditions (e.g., wear and high temperature conditions) depends on the mechanical properties, the metallurgical bond to the substrate, and the percentage of dilution. The clad geometry and mechanical characteristics of the deposited layer are influenced greatly by the type of laser used as a heat source and process parameters used. Nowadays, the quality of fabricated coating by laser cladding and the efficiency of this process has improved thanks to the development of high-power diode lasers, with power up to 10 kW. In this study, the laser cladding by a high power direct diode laser (HPDDL) as a new heat source in laser cladding was investigated in detail. The high alloy tool steel material (AISI H13) as feedstock was deposited on mild steel (ASTM A36) by a HPDDL up to 8kW laser and with new design lateral feeding nozzle. The influences of the main process parameters (laser power, powder flow rate, and scanning speed) on the clad-bead geometry (specifically layer height and depth of the heat affected zone), and clad microhardness were studied. Multiple regression analysis was used to develop the analytical models for desired output properties according to input process parameters. The Analysis of Variance was applied to check the accuracy of the developed models. The response surface methodology (RSM) and desirability function were used for multi-criteria optimization of the cladding process. In order to investigate the effect of process parameters on the molten pool evolution, in-situ monitoring was utilized. Finally, the validation results for optimized process conditions show the predicted results were in a good agreement with measured values. The multicriteria optimization makes it possible to acquire an efficient process for a combination of clad geometrical and mechanical characteristics control.Keywords Laser cladding . High power direct diode laser . Response surface methodology (RSM) . Multi-response optimization Lasers Manuf. Mater. Process.

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“…5 Several processing parameters such as laser power, scanning speed, powder rate, or gas flow rate are important during LMD. 6,7 However, the efficiency of the LMD process is affected by the processing parameters which, in turn, affect the physical, microstructural, and microhardness profiling properties. Understanding the effects of these processing parameters during the LMD process, assist on controlling the resulting material properties.…”

Section: Introductionmentioning

confidence: 99%

The influence of scanning speed on the laser metal deposition OF Ti/TiC powders

Sobiyi¹,

Akinlabi²,

Akinlabi³

2017

Mater. tehnol.

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The paper describes experimental work performed on the laser metal deposition (LMD) of titanium carbide powders on a pure titanium substrate. The understanding the effect of LMD processing parameters is vital in controlling the properties of the final product fabricated from the LMD process. The objective of the study is to characterize the influence of the laser scanning speed of the metal deposition of titanium and titanium carbide powders on a pure titanium substrate. Microstructural results showed that the substrate is characterized by two-phase morphology; alpha and beta phases. The deposit zone microstructures showed that the grains are of continuous columnar in nature. The heat-affected zone region grain areas appear to decrease with increasing in scanning speed for different samples at different scanning speeds. The height of samples was observed to decrease with an increase in the scanning speed. The microhardness results showed that the hardness of the deposits is greater than the hardness of the substrate. Wear-resistance performance results showed that the coefficient of friction of the substrate is greater than the coefficient of friction of the deposit samples. Similarly, the wear volume loss of material of the substrate is higher than the deposits. The deposit contains titanium carbide and, as such, this powder has improved the wear resistance performance of the substrate. Keywords: titanium, lasers, metal deposition, scanning speed lanek opisuje eksperimentalno delo pri laserskem nana{anju (angl. LMD) prahu titanovega karbida na podlago iz~istega titana. Upo{tevanje u~inkov LMD procesnih parametrov je klju~no za kontrolo lastnosti kon~nega proizvoda, izdelanega z LMD postopkom. Namen {tudije je dolo~iti vpliv hitrosti skeniranja laserja na nana{anje prahu kovinskega titana in titanovega karbida na podlago iz~istega titana. Rezultati mikrostrukturne karakterizacije so pokazali, da je za podlago zna~ilna dvofazna morfologija; alfa-in beta faza. Mikrostruktura nane{ene plasti je pokazala, da so zrna obi~ajno stebraste strukture. Zrna v podro~ju toplotno vplivane cone se zmanj{ujejo z nara{~anjem hitrosti skeniranja, pri razli~nih vzorcih in razli~nih hitrostih skeniranja. Vi{ina vzorcev pri razli~nih hitrostih skeniranja, se je zmanj{evala z nara{~anjem hitrosti skeniranja. Rezultati mikrotrdote so pokazali, da je trdota nanosa ve~ja od trdote podlage. Obna{anje pri obrabi je pokazalo, da je koeficient trenja podlage ve~ji kot pa koeficient trenja nanosa. Izguba materiala zaradi obrabe je ve~ja pri podlagi kot pa pri nanosu. Nanos vsebuje titanov karbid, zato je ta prah pove~al obrabno odpornost podlage.

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Statistical analysis and optimization of process parameters in Ti6Al4V laser cladding using Nd:YAG laser

Cited by 214 publications

References 17 publications

Continuous maintenance and the future – Foundations and technological challenges

Continuous maintenance and the future – Foundations and technological challenges

Parametric Study and Multi-Criteria Optimization in Laser Cladding by a High Power Direct Diode Laser

The influence of scanning speed on the laser metal deposition OF Ti/TiC powders

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