EB Surface Alloying and Plasma Nitriding of Different Al Alloys

Within the last years, considerable progress was achieved in the research field of plasma nitriding of Al alloys. However, due to large property differences between the very hard AlN layer and the soft Al matrix material the load capacity of the nitride layer is limited. Electron beam (EB) surface alloying modifies the chemical composition of the area near the surface up to a certain depth. This, for instance, results in high hardness levels, and therefore this layer acts as support for the hard and wear-resistant thin AlN layer generated by plasma nitriding. In the present study, surface modifications produced by a combination of EB alloying with Fe based additives and plasma nitriding of wrought, cast and spray-formed Al alloys were investigated. After the EB treatment the layers were examined regarding their influence on the structure, the nitride layer growth mechanism, the effect of the EB layer for the support of the AlN layer and the resulting duplex layer properties, e.g. hardness and wear behaviour.

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Mathematical Modelling of Nitride Layer Growth of Low Temperature Gas and Plasma Nitriding of AISI 316L

MATEC Web of Conferences ◽

10.1051/matecconf/20141304022 ◽

2014 ◽

Vol 13 ◽

pp. 04022

Author(s):

A. Triwiyanto ◽

A. Zainuddin ◽

K.A.Z Abidin ◽

M.A Billah ◽

P. Hussain

Keyword(s):

Low Temperature ◽

Mathematical Modelling ◽

Plasma Nitriding ◽

Nitride Layer ◽

Layer Growth ◽

Aisi 316L

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Influence of ageing treatment on microstructure, mechanical properties and adhesive wear behaviour of 6063 aluminium alloy

Industrial Lubrication and Tribology ◽

10.1108/ilt-01-2012-0007 ◽

2014 ◽

Vol 66 (4) ◽

pp. 520-524 ◽

Cited By ~ 1

Author(s):

Serkan Büyükdoğan ◽

Süleyman Gündüz ◽

Mustafa Türkmen

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

High Speed ◽

Al Alloys ◽

Wear Behaviour ◽

Al Alloy ◽

Strain Ageing ◽

Content Type ◽

Static Strain ◽

Structural Applications

Purpose – The paper aims to provide new observations about static strain ageing in aluminium (Al) alloys which are widely used in structural applications. Design/methodology/approach – The present work aims to provide theoretical and practical information to industries or researchers who may be interested in the effect of static strain ageing on mechanical properties of Al alloys. The data are sorted into the following sections: introduction, materials and experimental procedure, results and discussion and conclusions. Findings – Tensile strength, proof strength (0.2 per cent) and percentage elongation measurement were used to investigate the effect of strain ageing on the mechanical properties. Wear tests were performed by sliding the pin specimens, which were prepared from as-received, solution heat-treated, deformed and undeformed specimens after ageing, on high-speed tool steel (64 HRC). It is concluded that the variations in ageing time improved the strength and wear resistance of the 6063 Al alloy; however, a plastically deformed solution-treated alloy has higher strength and wear resistance than undeformed specimens for different ageing times at 180°C. Practical implications – A very useful source of information for industries using or planning to produce Al alloys. Originality/value – This paper fulfils an identified resource need and offers practical help to the industries.

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The role of Ar flow rates on synthesis of nanostructured zirconium nitride layer growth using plasma enhanced hot filament nitriding (PEHFN) technique

The European Physical Journal Applied Physics ◽

10.1051/epjap/2014140246 ◽

2015 ◽

Vol 69 (1) ◽

pp. 10801 ◽

Cited By ~ 2

Author(s):

Uzma Ikhlaq ◽

Akira Hirose ◽

Riaz Ahmad ◽

Amir Ikhlaq ◽

Sehrish Saleem ◽

...

Keyword(s):

Nitride Layer ◽

Layer Growth ◽

Zirconium Nitride ◽

Flow Rates ◽

Hot Filament

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Wear Behaviour of ZA27/SiC/Graphite Composites under Lubricated Sliding Conditions

Materials ◽

10.3390/ma13173752 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3752

Author(s):

Nenad Miloradović ◽

Rodoljub Vujanac ◽

Ana Pavlović

Keyword(s):

Wear Resistance ◽

Base Alloy ◽

Matrix Material ◽

Wear Behaviour ◽

Casting Technique ◽

Za27 Alloy ◽

Graphite Composites ◽

Sliding Distance ◽

Electronic Microscope ◽

Lubricated Sliding

The composites samples based on ZA27 alloy were subjected to tribological tests and the observed results are presented in this paper. The samples (ZA27/5%SiC and ZA27/5%SiC/5%Gr) were obtained by compo-casting technique. Their wear behaviour was compared to the base alloy. The wear tests were done by using a block-on-disc tribometer under lubricated sliding conditions. Tribological investigation were conducted for three normal loads (40 N, 80 N, and 120 N), three sliding speeds (0.25 m/s, 0.5 m/s, and 1 m/s), and sliding distance of 1200 m. The tested materials were analysed by the scanning electronic microscope (SEM) and the energy dispersive spectrometry (EDS). The presence of oil lubricant improved the wear resistance and friction behaviour of both composites and base alloy. The tested composites show much higher wear resistance than the corresponding matrix material. It was established that the ZA27/5%SiC/5%Gr hybrid composite has best tribological properties.

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Effect of TiCN and AlCrN Coating on Tribological Behaviour of Plasma-nitrided AISI 4140 Steel

International Journal of Surface Engineering and Interdisciplinary Materials Science ◽

10.4018/ijseims.2017070101 ◽

2017 ◽

Vol 5 (2) ◽

pp. 1-17

Author(s):

Santosh Vitthal Bhaskar ◽

Hari Narayan Kudal

Keyword(s):

Physical Vapor Deposition ◽

Sliding Wear ◽

Plasma Nitriding ◽

Titanium Carbonitride ◽

Wear Behaviour ◽

Dry Sliding Wear ◽

Tribological Behaviour ◽

Wear Properties ◽

Aisi 4140 Steel ◽

Aisi 4140

In the present article, samples made of AISI 4140 steel, pre-treated with plasma nitriding (PN), and coated with different coatings like Titanium Carbonitride (TiCN), Aluminium Chromium Nitride (AlCrN), using Physical Vapor Deposition (PVD) technique, were investigated in terms of their microhardness, surface roughness, and dry sliding wear behaviour. Wear tests were performed with a pin-on-disc machine. Coatings were deposited on plasma nitrided samples. The wear behaviour, and wear mechanisms of TiCN- and AlCrN-coated, PN treated AISI 4140 specimens were investigated using a field emission Scanning Electron Microscope (SEM), equipped with an Energy Dispersive X-ray (EDX) analyzer. An SEM was used to study the surface morphology of the worn surfaces. Also, adhesion tests were conducted to investigate the adhesion quality of the coated specimens. The results of the investigation showed improved wear properties. Furthermore, the compound layer formed during nitriding was found to act as an intermediate hard layer, leading to superior sliding wear properties.

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Enhanced Wear Behaviour of Spark Plasma Sintered AlCoCrFeNiTi High-Entropy Alloy Composites

Materials ◽

10.3390/ma11112225 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2225 ◽

Cited By ~ 9

Author(s):

Martin Löbel ◽

Thomas Lindner ◽

Thomas Lampke

Keyword(s):

Wear Resistance ◽

High Hardness ◽

Solid Lubricants ◽

Wear Behaviour ◽

High Entropy Alloy ◽

Surface Protection ◽

High Entropy ◽

Production Route ◽

The Coefficient Of Friction ◽

Spark Plasma

High hardness and good wear resistance have been revealed for the high-entropy alloy (HEA) system AlCoCrFeNiTi, confirming the potential for surface protection applications. Detailed studies to investigate the microstructure and phase formation have been carried out using different production routes. Powder metallurgical technologies allow for much higher flexibility in the customisation of materials compared to casting processes. Particularly, spark plasma sintering (SPS) enables the fast processing of the feedstock, the suppression of grain coarsening and the production of samples with a low porosity. Furthermore, solid lubricants can be incorporated for the improvement of wear resistance and the reduction of the coefficient of friction (COF). This study focuses on the production of AlCoCrFeNiTi composites comprising solid lubricants. Bulk materials with a MoS2 content of up to 15 wt % were produced. The wear resistance and COF were investigated in detail under sliding wear conditions in ball-on-disk tests at room temperature and elevated temperature. At least 10 wt % of MoS2 was required to improve the wear behaviour in both test conditions. Furthermore, the effects of the production route and the content of solid lubricant on microstructure formation and phase composition were investigated. Two major body-centred cubic (bcc) phases were detected in accordance with the feedstock. The formation of additional phases indicated the decomposition of MoS2.

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