Laser Metal Deposition as Repair Technology for Stainless Steel and Titanium Alloys

Graf, Benjamin; Gumenyuk, Andrey; Rethmeier, Michael

doi:10.1016/j.phpro.2012.10.051

Cited by 186 publications

(77 citation statements)

References 9 publications

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“…It can be used to repair worn surfaces or to produce a hard facing layer [10]. A laser beam is used to melt the surface of a specimen and a powdery filler material is injected in the molten pool [54,132]. The low metallurgical impact is particularly important for preservation of material's microstructure (e.g., high-strength steels) [53,102].…”

Section: Coating Technologiesmentioning

confidence: 99%

Continuous maintenance and the future – Foundations and technological challenges

et al. 2016

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Section: Coating Technologiesmentioning

confidence: 99%

Continuous maintenance and the future – Foundations and technological challenges

et al. 2016

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“…1,2 However, the use of titanium in severe wear applications is limited due to its poor tribological properties. 3,4 Titanium alloys are very expensive to replace when damaged during their service life as a result of their high cost.…”

Section: Introductionmentioning

confidence: 99%

“…3 The technique can be used for modifying the surfaces of titanium alloys using powder metals such as, ceramics, metals and alloys, composites and intermetallics, for improving its wear resistance, medical biocompatibility, corrosion and oxidation resistance. 5 Several processing parameters such as laser power, scanning speed, powder rate, or gas flow rate are important during LMD.…”

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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“…Laser metal deposition (LMD) process is an advanced manufacturing process that is one of the classes of additive manufacturing technologies capable of producing three dimensional object and repair of high valued parts [1,2]. Laser metal deposition process is a contactless manufacturing process that is used for difficult to process materials such as Ti6Al4V [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Powder Flow Rate on Properties of Laser Deposited Titanium Alloy -Ti6Al4V

Mahamood¹,

Akinlabi²

2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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Abstract. Titanium alloy-Ti6Al4V is an important aerospace alloy with excellent properties but it is classified as difficult to machine material that requires an alternative manufacturing process. Laser metal deposition process is an ideal alternative manufacturing process that can offset most of the problem encountered while processing the alloy using the traditional manufacturing method. Processing parameter play an important role in the resulting properties of material processed using the laser metal deposition process. The key processing parameters that have significant influence in the properties of the processed material in laser metal deposition process include laser power, scanning speed, powder flow rate and gas flow rate. In this study, the effect of powder flow rate on the evolving microstructure and microhardness of Ti6Al4V using the laser metal deposition process is investigated. The laser power, scanning speed and powder flow rate were kept constant while the powder flow rate was varied between 1.44 g/min and 7.2 g/min. The results showed that the microhardness increased as the powder flow rate was increased. The microstructure was found to change from coarse Widmanstätten alpha to coarse martensitic alpha as the powder flow rate was increased. This study is important to know the required powder flow rate to be employed in order to achieve the desired properties during building of new part as well as repair.

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Laser Metal Deposition as Repair Technology for Stainless Steel and Titanium Alloys

Cited by 186 publications

References 9 publications

Continuous maintenance and the future – Foundations and technological challenges

Continuous maintenance and the future – Foundations and technological challenges

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

Influence of Powder Flow Rate on Properties of Laser Deposited Titanium Alloy -Ti6Al4V

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