Influence of GNPs and B4C reinforcements on mechanical, thermal and wear properties of magnesium matrix composite produced by powder metallurgy

2021 ◽  
pp. 002199832110316
Author(s):  
Yavuz Sun ◽  
Engin Cevik ◽  
Yunus Turen ◽  
Hayrettin Ahlatci ◽  
Muhammet Emre Turan ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
General Trend ◽  
Pure Magnesium ◽  
Magnesium Matrix Composite ◽  
Wear Properties ◽  
Magnesium Matrix ◽  
Porosity Level ◽  
Wear Tests ◽  
Powder Metallurgy Route ◽  
Composite Samples

In this study, graphene nanoplatelets (GNPs) and boron carbide (B4C) nano reinforcements were incorporated to the pure magnesium (Mg). Powder metallurgy route was used to fabricate composite samples. Microstructures of specimens were examined and tensile, hardness, wear tests were performed to determine the mechanical and tribological performance of produced samples. The results indicate that the hardness was increased especially with the addition of 2% B4C and 0.5% GNPs reinforcements. A general trend was observed for the enhancements of yield and tensile strengths when nano reinforcements were added to the pure magnesium. The composite samples showed better wear resistance than the unreinforced sample. However, thermal conductivity began to decrease with the addition of B4C reinforcements. It is also observed that the porosity level was also higher for the composite samples.

Tribological Study of Magnesium Alloys for Implant Applications

2014 ◽  
Author(s):  
Paul McGhee ◽  
Devdas Pai ◽  
Sergey Yarmolenko ◽  
Zhigang Xu ◽  
Sudheer Neralla ◽  
...  
Keyword(s):  
Extrusion Direction ◽  
Longitudinal Direction ◽  
Pure Magnesium ◽  
Optical Profilometry ◽  
Wear Properties ◽  
Biodegradable Implant ◽  
Cross Sectional ◽  
Wear Performance ◽  
Heat Treated ◽  
Wear Tests

Magnesium and its alloys have been found to potential candidates for biodegradable implant applications. However, magnesium and its alloys are broadly known to have poor tribological properties, but detailed specifics on wear performance are scarce. This research investigates the tribological characteristics on Mg-Zn-Ca-RE alloys and pure magnesium under as-cast and extruded conditions. Pure magnesium and Mg-Zn-Ca-RE alloys were hot extruded at 350°C and 400°C. Magnesium and Mg-Zn-Ca-Re alloy were also cast at 350°C and heat treated at 510°C. Directional wear properties were investigated using a CETR-UMT 2 microtribometer under unlubricated conditions in a reciprocating configuration for 120 cycles, with normal loads ranging from 0.5N–2.5N. Wear tests were conducted in directions: cross-sectional, longitudinal (along the extrusion direction) and transverse direction (perpendicular to the extrusion direction). Wear properties and friction properties were analyzed using a microtribometer, a mechanical stylus profiler, and microindentation. Surface morphology and microstructure were characterized using optical microscopy, scanning electron microscopy, and optical profilometry. The results show a lower wear rate in the transverse and cross-sectional direction compared to the longitudinal direction.

Hardness and Wear properties of Al-AlN Composite Produced using Powder Metallurgy Route

2017 ◽  
Vol 48 (3) ◽  
pp. 161-166
Author(s):  
Evarastics Polycarp ◽  
◽  
Azmi Rahmat ◽  
Mohd Nazree Derman ◽  
Gowon Baba
Keyword(s):  
Powder Metallurgy ◽  
Wear Properties ◽  
Powder Metallurgy Route

Ti–6Al–4V particle reinforced magnesium matrix composite by powder metallurgy

2005 ◽  
Vol 59 (14-15) ◽  
pp. 1831-1835 ◽  
Author(s):  
Y.L. Xi ◽  
D.L. Chai ◽  
W.X. Zhang ◽  
J.E. Zhou
Keyword(s):  
Powder Metallurgy ◽  
Matrix Composite ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix

scholarly journals Comparative study on wear behavior of as cast and spray cast hypereutectic Al-Si alloy

2018 ◽  
Vol 27 (3-4) ◽  
Author(s):  
Dayanand M. Goudar ◽  
Mehabubsubahani R. Alavandi ◽  
Saiyad Hasan S. Khaji ◽  
G.B. Rudrakshi ◽  
V.C. Srivastava
Keyword(s):  
Wear Behavior ◽  
Spray Deposition ◽  
Grain Morphology ◽  
Deposition Process ◽  
Primary Silicon ◽  
Wear Properties ◽  
Porosity Level ◽  
X Ray ◽  
Cast Alloys ◽  
Wear Tests

AbstractThe microstructure characteristics and wear behavior of a spray-deposited (SD) and the hot compressed Al-28Si alloys were investigated and the results were compared with corresponding SD and as-cast alloys. The microstructure, hardness and wear properties of the spray-deposited alloy was studied using X-ray diffraction, optical microscopy, scanning electron microscopy (SEM), microhardness measurement and wear tests. The microstructures of the SD alloy were composed of refined and uniformly distributed primary silicon (Si) and the formation a fine eutectic phase at the inter particle boundaries of an equiaxed grain morphology of the aluminum (Al) matrix. The decrease in the porosity level and further refinement of primary Si and eutectic Si phases in the hot pressed alloy. The wear tests indicate that the hot pressed spray formed alloy showed good wear resistance compared to both the SD and as-cast alloys. The improvement in the wear behavior is discussed in the light of microstructure evolution by the spray-deposition process. The worn surfaces were characterized by SEM-energy dispersive X-ray spectroscopy (EDS).

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