Mechanism of ceramic-like friction of quasicrystal reinforced Al matrix composites formed by in-situ directed energy deposition

2021 ◽  
pp. 1-27
Author(s):  
Shuo Li ◽  
Mohamed El Mansori ◽  
Qingzheng Wang ◽  
Nan Kang ◽  
Mourad Elhadrouz
Keyword(s):  
Wear Resistance ◽  
Matrix Composite ◽  
Energy Deposition ◽  
Wear Behavior ◽  
Matrix Composites ◽  
Directed Energy Deposition ◽  
Al Matrix Composites ◽  
Directed Energy ◽  
Al Matrix Composite ◽  
Al Matrix

Abstract The wear of aluminum alloy may be decreased by its reinforcement with quasicrystals prepared by melt, which in itself has good wear-resisting properties. This research paper considers the part played by a dense Al-Fe-Cr quasicrystal (QC) reinforced Al matrix composite fabricated by the directed energy deposition (DED) in reducing wear between sliding surfaces and discusses briefly some of the factors which, in practice, explain ceramic-like properties of quasicrystal including low friction and wear resistance. The hardness of reinforcement phases, QC Al91Fe4Cr5 and Al13(Fe, Cr)4, was up to ~ 91 and ~ 112 HV respectively, while the Al matrix was just ~ 70 HV. Furthermore, the reinforcement phases contributed to form the mechanical mixing layer (MML) which significantly decreased the coefficient of friction (COF) and improves the wear resistance. With the increase of load from 1N to 5N, the COF dropped from 0.82 to 0.33 because the higher load was beneficial to the formation of harder and denser MML. Through the comprehensive analysis of the wear test and worn surface, the wear behavior and mechanism of this QC reinforced Al matrix composite has been explained in detail. The results indicate that the quasicrystal reinforced Al matrix composites formed by DED is one of the promising wear-resistance materials.

Microstructural characterization and wear properties of ultra-dispersed nanodiamond (UDD) reinforced Al matrix composites fabricated by ball-milling and sintering

2011 ◽  
Vol 46 (13) ◽  
pp. 1521-1534 ◽  
Author(s):  
H Kaftelen ◽  
ML Öveçoğlu
Keyword(s):  
Wear Resistance ◽  
Ball Milling ◽  
Microstructural Characterization ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Al Matrix Composites ◽  
Al Matrix Composite ◽  
Al Matrix

Elemental aluminum (Al) powders reinforced with 1–10 wt% of ultra-dispersed nanodiamond (UDD) powders were ball-milled in a SpexTM Mixer/Mill between 0 and 120 min followed by consolidation and sintering. X-ray diffraction analyses on the ball-milled powders revealed only α-Al peaks, whereas Al4C3 phase was identified along with α-Al in all sintered composites. Increasing the addition of nanodiamond to Al-matrix resulted in improved hardness of both ball-milled and sintered composites. The wear resistances of the Al-UDD composites were significantly improved with increasing UDD contents. Under similar load and sliding conditions, the wear resistance of Al matrix composite containing 10 wt% nanodiamond enhances about 40 times when compared with unreinforced aluminum.

scholarly journals Fabrication of a TiC-Ti Matrix Composite Coating Using Ultrasonic Vibration-Assisted Laser Directed Energy Deposition: The Effects of Ultrasonic Vibration and TiC Content

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 693
Author(s):  
Yunze Li ◽  
Dongzhe Zhang ◽  
Hui Wang ◽  
Weilong Cong
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Ultrasonic Vibration ◽  
Matrix Composite ◽  
Energy Deposition ◽  
Bonding Quality ◽  
Manufacturing Defects ◽  
Directed Energy Deposition ◽  
Fabrication Defects ◽  
Directed Energy

Titanium and its alloys exhibit superior properties of high corrosion resistance, an excellent strength to weight ratio and outstanding stiffness among other things. However, their relatively low hardness and wear resistance limit their service life in high-performance applications of structure parts, gears and bearings, for example. The fabrication of a ceramic reinforced titanium matrix composite (TMC) coating could be one of the solutions to enhance the microhardness and wear resistance. Titanium carbide (TiC) is a preferable candidate due to the advantages of self-lubrication, low cost and a similar density and thermal expansion coefficient with titanium. The fabrication of TiC-TMC coatings onto titanium using a laser directed energy deposition (LDED) process has been conducted. The problems of TiC aggregation, low bonding quality and the generation of fabrication defects still exist. Considering ultrasonic vibration could generate acoustic steaming and transient cavitation actions in melted materials, which could homogenize the distribution of reinforcement materials and promote the dissolution of TiC into liquid titanium. In this study, for the first time, we investigate the ultrasonic vibration-assisted LDED of TiC-TMC coatings. The effects of ultrasonic vibration and reinforcement content on the phase compositions, reinforcement aggregation, bonding quality, fabrication defects and mechanical properties (including microhardness and wear resistance) of LDED deposited TiC-TMC coatings have been investigated. With the assistance of ultrasonic vibration, the aggregation of TiC was reduced, the porosity was decreased, the defects in the bonding interface were reduced and the mechanical properties including microhardness and wear resistance were increased. However, the excessive TiC content could significantly increase the TiC aggregation and manufacturing defects, resulting in the reduction of the mechanical properties.

INVESTIGATION ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF BORON NITRIDE NANOPARTICLE REINFORCED ALUMINUM-BASED COMPOSITES

2021 ◽  
Vol 16 (3) ◽  
pp. 112-123
Author(s):  
Mahmut Can Şenel ◽  
Mevlüt Gürbüz
Keyword(s):  
Compressive Strength ◽  
Boron Nitride ◽  
Mechanical Strength ◽  
Matrix Composite ◽  
Vickers Hardness ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

In the current work, nano boron nitride (BN) reinforced aluminum (Al) matrix composites with different BN amounts (0.5-2wt.%) were produced by the powder metallurgy(PM) route. This fabrication method consists of dispersing, filtering, mixing, drying, compaction, and sintering processes. The density, compressive strength, micro Vickers hardness, microstructure, and phase structures of Al-BN composites and pure Al were examined. The obtained results indicated that minimum porosity (3.2%), highest density (~2.61g/cm3), Vickers hardness (~50HV), and compressive strength (~168MPa) were obtained at 1%BN reinforced aluminum matrix composite. A tremendous enhancement in Vickers hardness and compressive strength of %1BN reinforced Al matrix composite was achieved as ~61% and ~110% compared to pure Al. Consequently, the mechanical strength of BN reinforced Al-based composites enhanced up to 1% nano boron nitride amount. Due to the clumping of BN nanoparticles, the mechanical strength decreased after this content.

Comparison of effect of SiC and MoS2 on wear behavior of Al matrix composites

2019 ◽  
Vol 29 (6) ◽  
pp. 1169-1183 ◽  
Author(s):  
Mohammad ROUHI ◽  
Mohammad MOAZAMI-GOUDARZI ◽  
Mohammad ARDESTANI
Keyword(s):  
Wear Behavior ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

On the microstructure, hardness and wear behavior of Al-Fe-Cr quasicrystal reinforced Al matrix composite prepared by selective laser melting

2017 ◽  
Vol 132 ◽  
pp. 105-111 ◽  
Author(s):  
Nan Kang ◽  
Yingqing Fu ◽  
Pierre Coddet ◽  
Bruno Guelorget ◽  
Hanlin Liao ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Matrix Composite ◽  
Wear Behavior ◽  
Laser Melting ◽  
Al Matrix Composite ◽  
Al Matrix

scholarly journals Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 282 ◽  
Author(s):  
Gyeong Yun Baek ◽  
Gwang Yong Shin ◽  
Ki Yong Lee ◽  
Do Sik Shim
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Energy Deposition ◽  
High Wear Resistance ◽  
Matrix Microstructure ◽  
Microstructure Observation ◽  
Directed Energy Deposition ◽  
Directed Energy ◽  
Post Deposition

This study focused on the mechanical and metallurgical characteristics of high-wear-resistance steel (HWS) deposited using directed energy deposition (DED) for metal substrate hardfacing or repairing. As post-deposition heat treatment changes the metallurgical characteristics of deposits, the effect of post-deposition heat treatment on the mechanical properties was investigated via microstructure observation and by conducting hardness, wear, and impact tests. The obtained micro-images showed that the deposited HWS layers exhibit cellular and columnar dendrites, and the microstructure of heat-treated HWS (HT-HWS) transformed its phase during quenching and tempering. The hardness and wear resistance of the HT-HWS deposits were higher than those of the HWS deposited specimen, whereas the latter exhibited a higher fracture toughness. The matrix microstructure and carbide characteristics, which are characterized by the chemical composition of the materials, significantly influenced the mechanical properties.

scholarly journals Mechanical properties and wear behavior of fly ash particle reinforced Al matrix composites

2020 ◽  
Vol 7 (1) ◽  
pp. 016595 ◽  
Author(s):  
Akash Mayurbhai Desai ◽  
Tanay Rudra Paul ◽  
Manab Mallik
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Wear Behavior ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix
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