Determining of laser surface treatment parameters used for light metal alloying with ceramic powders

Tański, Tomasz

doi:10.1002/mawe.201400232

Cited by 22 publications

(11 citation statements)

References 13 publications

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“…In general, metallic materials strengthening consists of applying actions which limit dislocation movements resulting in an increased yield strength. The numerous methods of metals and metal alloy strengthening include strengthening by: grain refinement, solid solution, particles, or cold working [1][2][3][4][5][6]. For several decades, numerous efforts have been made in the development of machinery and equipment constructions, including modern means of transportation, especially in the aviation and automotive sector, to replace steel components with other, namely non-ferrous metals such as light metal alloys, chiefly aluminium and magnesium [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect Of Milling Time On Microstructure Of AA6061 Composites Fabricated Via Mechanical Alloying

Tomiczek¹,

Pawlyta²,

Adamiak³

et al. 2015

Archives of Metallurgy and Materials

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The aim of this work is to determine the effect of manufacturing conditions, especially milling time, on the microstructure and crystallite size of a newly developed nanostructural composite material with the aluminium alloy matrix reinforced with halloysite nanotubes. Halloysite, being a clayey mineral of volcanic origin, is characterized by high porosity and large specific surface area. Thus it can be used as an alternative reinforcement in metal matrix composite materials. In order to obtain this goal, composite powders with fine microstructures were fabricated using high-energy mechanical alloying, cold compacting and hot extrusion techniques. The obtained composite powders of aluminium alloy reinforced with 5, 10 and 15 wt% of halloysite nanotubes were characterized with SEM, TEM and XRD analysis. It has been proven that the use of mechanical alloying leads to a high degree of deformation, which, coupled with a decreased grain size below 100 nm and the dispersion of the refined reinforcing particles-reinforces the material very well.Keywords: aluminium matrix composites, halloysite nanotubes, mechanical milling, hot extrusion Celem niniejszej pracy było określenie wpływu warunków wytwarzania, w szczególności czasu mielenia, na strukturę i wielkość krystalitów nowo opracowanych nanostrukturalnych materiałów kompozytowych o osnowie stopów aluminium wzmacnianych nanorurkami haloizytowymi. Haloizyt, będący minerałem ilastym pochodzenia wulkanicznego, charakteryzuje się dużą porowatością, dużą powierzchnią właściwą, i może stanowić alternatywne wzmocnienie metalowych materiałów kompozytowych. W tym celu przy użyciu wysokoenergetycznego mechanicznego stopowania w młynie kulowym wytworzono rozdrobnione i trwale połączone proszki kompozytowe, które następnie poddano zagęszczaniu na zimno i wyciskaniu na gorąco. Tak opracowane materiały kompozytowe o udziale masowym haloizytowego wzmocnienia 5, 10, 15% zbadano metodami skaningowej i transmisyjnej mikroskopii elektronowej oraz rentgenowskiej analizy fazowej. Stwierdzono, że wywołane mechanicznym stopowaniem silne odkształcenie plastyczne i zmniejszenie rozmiaru ziarna poniżej 100 nm oraz dyspersja haloizytowych cząstek wzmacniających wpłynęła na znaczne umocnienie materiałów kompozytowych.

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Section: Introductionmentioning

confidence: 99%

Effect Of Milling Time On Microstructure Of AA6061 Composites Fabricated Via Mechanical Alloying

Tomiczek¹,

Pawlyta²,

Adamiak³

et al. 2015

Archives of Metallurgy and Materials

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“…The application was performed with a modern high power diode laser. The case studies of these four applications are presented and discussed in scientific papers [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Laser Feeding on Structure and Properties of Cast Aluminium Alloy Surface

Labisz

2015

Mechanical and Materials Engineering of Modern Structure and Component Design

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The modern methods for surface layer engineering in current surface laser treatments, is LSA treatment, where there are small amounts of alloying additions introduced into the surface layer of the matrix material in the form of ceramic particle powders with different properties influencing the surface layer application possibilities. It was possible to produce a layer consisting of the heat affected zone, transition zone and remelted zone, without cracks and defects as well as with a slightly higher hardness value compared to the non remelted material. The laser power range was chosen to be 1.5-2.0 kW and implicated by a process speed rate in the range of 0.25-0.75 m/min. The purpose of this work is to apply High Power Diode Laser (HPDL) for the improvement of aluminum's mechanical properties, especially the surface hardness. This study was conducted to determine the effect of SiC powder addition on the structure and the mechanical properties as well as the structural changes occurring during the rapid solidification process. The main findings were, that the obtained surface layer is without cracks and defects as well as having a comparably higher hardness value when compared to the nonremelted material. The hardness value increases according to the laser power used so that the highest power applied gives the highest hardness value in the remelted layer.Also, the distribution of the SiC particles is good, but the particles are mainly present in the upper part of the surface layer. The hardness value increases in general according to the laser power used so that the highest power applied renders the highest hardness value in the remelted layer. The main goal of this work is to investigate and determine the effect of HPDL remelting and alloying on the cast AlSi-Cu cast aluminium alloy structure to recognise the possibility for application in real working conditions mainly for light metal constructions as in the many branches of the industry.

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“…Special attention was payed to studying of the surface layer morphology of the investigated material especially the surface layer microstructure [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] if the used ceramic particle powder was properly introduced into the matrix, how the phases were changed in terms of distribution and size as well as if a zone-like structure was obtained after appliance of the laser surface treatment.…”

Section: Introductionmentioning

confidence: 99%

Thermo-derivative analysis of Al–Si–Cu alloy used for surface treatment

Labisz

Konieczny

Jurczyk

et al. 2017

J Therm Anal Calorim

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The only effective way to design, produce, analyse and optimise new and existing industrial thermal processes and also laser-based processes is to develop a quantitative knowledge and understanding of the dependence between temperature and time, which allow the desired forming of properties of the final products. The purpose of this paper was the performance of thermoderivative analysis using the UMSA platform of aluminium alloy cooled at chosen rate, for obtaining characteristics used later for laser treatment and its influence on the microstructure and properties of the surface layer of heat-treated Al-Si-Cu cast aluminium alloys, using the high-power diode laser. The performed laser treatment involves remelting and feeding of ceramic powder into the aluminium surface. The carried out investigations allow to conclude that as a result of alloying of the heat-treated cast aluminium alloys with oxide ceramic powder, a surface layer was obtained with higher hardness compared to non-laser-treated material. The surface layer can be enriched with the powder particle, and in some cases a high-quality top layer is possible to obtain. Also a microstructure refinement of the surface layer was achieved due to the high laser power use and consequently high cooling rate during the crystallisation process. Concerning original practical implications of this work, there was important to investigate the appliance possibility of thermal analysis for further surface treatment for enhancement of the aluminium surface properties, especially the wear resistance and hardness. The scientific reason was also to describe microstructure changes and processes occurred in the laser remelted surface aluminium layer after laser treatment.

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Determining of laser surface treatment parameters used for light metal alloying with ceramic powders

Cited by 22 publications

References 13 publications

Effect Of Milling Time On Microstructure Of AA6061 Composites Fabricated Via Mechanical Alloying

Effect Of Milling Time On Microstructure Of AA6061 Composites Fabricated Via Mechanical Alloying

Influence of Laser Feeding on Structure and Properties of Cast Aluminium Alloy Surface

Thermo-derivative analysis of Al–Si–Cu alloy used for surface treatment

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