Strong fibres and fibre-reinforced metals

1964 ◽  
Vol 282 (1388) ◽  
pp. 43-52 ◽  
Keyword(s):  
Mechanical Properties ◽  
Experimental Work ◽  
Metal Matrix ◽  
Technological Application ◽  
Load Bearing ◽  
Technological Value ◽  
Engineering Materials ◽  
Silica Fibre ◽  
Properties Of Composites

The potentia Isuperiority of ceramics over metals as engineering materials, and their possible technological application as load-bearing fibres in a metal matrix, is discussed. The aluminium + silica fibre system is useful as a model and also appears to be of some technological value. A review is made of experimental work on fibre strengths, fabrication techniques and mechanical properties of composites of this type.

Testing and Evaluation of Mechanical Properties for Anisotropic Engineering Materials with Varied Loads

2013 ◽  
Vol 544 ◽  
pp. 471-475
Author(s):  
Huai Liang Zhu ◽  
Li Feng Yu ◽  
Jing Ni ◽  
Xue Wang ◽  
Ren An Luo
Keyword(s):  
Mechanical Properties ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Engineering Structures ◽  
Load Bearing ◽  
Tension Tests ◽  
Loading Case ◽  
Impact Tension ◽  
Engineering Materials ◽  
Mechanism Of Failure

This paper is aimed at investigating the influence of load-bearing style on the mechanical behavior of anisotropic engineering materials. The study on elastic constants and failure forms of materials will be presented under different loading condition. Firstly, the mechanical properties of unidirectional holey laminated materials are discussed based on the uniaxial tensile tests. The equivalent elastic modulus, Poisson’s ratio and shear modulus are obtained, and the pattern and mechanism of failure are analyzed. Then, the biaxial tensile tests are carried out for PVC orthotropic membrane materials with different stress ratio between the warp and weft direction. A comparison of limit strengths under biaxial loadings is given with that in uniaxial loading case. Finally, the dynamical behaviors of shape memory alloy (SMA), iron wire, and rubber composite as well as compound rubber are studied respectively by impact-tension tests. The failure forms, energy dissipation ratio and impact-tension toughness of materials are analyzed. It is shown that the mechanical properties and failure pattern of anisotropic materials have much to do with the load-bearing styles. It agrees well with actual properties of anisotropic material used in engineering structures.

Sintering Effect on Mechanical Properties of Composites of Bovine Derived Hydroxyapatite (BHA) with Titanium

2006 ◽  
Vol 309-311 ◽  
pp. 359-362 ◽  
Author(s):  
L.S. Ozyegin ◽  
Oguzhan Gunduz ◽  
Faik N. Oktar ◽  
B. Oz ◽  
Simeon Agathopoulos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
High Performance ◽  
X Ray Diffraction ◽  
Metallic Titanium ◽  
Load Bearing ◽  
X Ray ◽  
Properties Of Composites ◽  
Sintering Effect

The aim of this study was to prepare high performance biomaterials suitable for use at load bearing applications with high bioactivity. The hydroxyapatite (HA) was prepared from bovine bones via calcination technique. The bovine derived HA (BHA) was mixed with 5 and 10 wt% metallic titanium (Ti) and the obtained homogenous mixtures were pressed to produce the test samples. The compacts were sintered at temperatures between 1000 and 1300°C. Compression strength, density, and microhardness were measured. SEM and X-ray diffraction studies were also made. The best mechanical properties were obtained between after sintering at 1200-1300°C.

Microstructure and Mechanical Behavior of Nanoparticles Reinforced Metal Matrix Composites – A Review

2014 ◽  
Vol 592-594 ◽  
pp. 939-944 ◽  
Author(s):  
S. Santhosh Kumar ◽  
Somashekhar S. Hiremath
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Performance ◽  
Physical And Mechanical Properties ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
Effect Of Particle Size ◽  
Properties Of Composites

Micro sized particles such as SiC, Al2O3and diamond particles reinforced with metal matrix composites are most commonly used in high performance applications like military, automotive and aerospace industries. Nowadays nano sized particles are replacing the micro sized particles because of their improved physical and mechanical properties. This paper reviews the stir processing method, mechanical properties, effect of particle size on properties of composites and structure of the metal matrix composites reinforced with nanoparticles. Among the variety of liquid metallurgy techniques processes available for preparing metal matrix composites, stir casting technique is generally accepted route and currently practised commercially because of its simplicity flexibility and Uniform distribution.

Effect of Graphene nanoparticles on microstructural and mechanical properties of aluminum based nanocomposites fabricated by stir casting

2020 ◽  
Vol 17 (6) ◽  
pp. 859-866
Author(s):  
Ashish Kumar Srivastava ◽  
Brijesh Sharma ◽  
Bismin R. Saju ◽  
Arpit Shukla ◽  
Ambuj Saxena ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Stir Casting ◽  
Metal Composite ◽  
Widespread Application ◽  
Content Type ◽  
Maximum Value ◽  
Structural Applications ◽  
Graphene Nanoparticles ◽  
Engineering Materials

Purpose The development of a new class of engineering materials is the current demand for aircraft and automobile companies. In this context metal, composite materials have a widespread application in different areas of manufacturing sectors. Design/methodology/approach In this paper, an attempt is made to develop the aluminium-based nano metal matrix composite reinforced with graphene nanoparticles (GNP) by using the stir casting method. Different weight percentage (0.4%, 0.8% and 1.2% by weight) of GNPs are used to fabricate metal matrix composites (MMCs). The developed nanocomposites were further validated by density calculation and optical microstructures to discuss the distribution of GNPs. The tensile test was conducted to determine the strength of the developed MMCs and also supported by fractographic analysis. In addition to it, the Rockwell hardness test and impact test (toughness) with fracture analysis were also conducted to strengthen the present work. Findings The results reveal the uniform distribution of GNPs into the matrix material. The yield strength and ultimate tensile strength obtained a maximum value of 155.67 MPa and 170.28 MPa, respectively. The hardness value (HRB) is significantly increased and 84 HRB was obtained for the sample with AA1100/0.4% GNP, while maximum hardness value (94 HRB) was obtained for the sample AA1100/1.2% GNP. The maximum value of toughness 14.3 Jules/cm2 is recorded for base alloy AA1100 while increasing the reinforcement percentage, it decreases up to 9.7 Jules/cm2 for AA1100/1.2% GNP. Originality/value Graphene nanoparticles are used to develop nanocomposites, which is one of the suitable alternatives for heavy engineering materials such as steels and cast irons. It has improved microstructural and mechanical properties which makes it preferable for many engineering and structural applications.

The Influence of Sintering Temperature on the Properties of Composites of Biologic Hydroxyapatite and Zirconia

2005 ◽  
Vol 284-286 ◽  
pp. 709-712 ◽  
Author(s):  
Faik N. Oktar ◽  
Yasin Genc ◽  
Gültekin Göller ◽  
Simeon Agathopoulos ◽  
D.U. Tulyaganov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Crystalline Structure ◽  
Sintering Temperature ◽  
Graft Material ◽  
Stabilized Zirconia ◽  
Load Bearing ◽  
Partially Stabilized Zirconia ◽  
Structure And Microstructure ◽  
Properties Of Composites

Bovine derived hydroxyapatite was doped with partially stabilized zirconia with 3 mol% yttria. The influence of sintering temperature and the amount of the incorporated zirconia on densification, mechanical properties, crystalline structure and microstructure was investigated. The results indicate that the produced materials exhibit poorer mechanical properties than the relevant composite materials of enamel derived hydroxyapatite. This difference can be attributed to F, since F-content in bone is much higher than in enamel. Hence, in the light of the prospective use of the investigated materials in biomedicine, bovine derived hydroxyapatite doped with zirconia can potentially serve as graft material for load bearing applications if very small amount of F can be incorporated, in order to resemble the composition of enamel derived apatite.

scholarly journals Synthesis of Metal Matrix Composites through Stir Casting Process – a Review

2020 ◽  
Vol 22 (1) ◽  
pp. 357-370 ◽  
Author(s):  
S. Sakthivelu ◽  
P. P. Sethusundaram ◽  
M. Meignanamoorthy ◽  
M. Ravichandran
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Weight Ratio ◽  
High Strength ◽  
Casting Process ◽  
Stir Casting ◽  
Matrix Composites ◽  
Pure Metals ◽  
Engineering Materials

AbstractMetal is the one of the important material in engineering materials because of their high strength to weight ratio. However the pure metals cannot be used as engineering materials due to their ductile property. So, to improve their mechanical properties, some of the high strength materials (not metals) were added as reinforcement to improve the mechanical properties of pure metals and the newly developed material is called as metal matrix composites. At present, Aluminium, Copper, Magnesium, Titanium and Iron have been used as matrix materials and materials like TiC, SiC, B4C, WC, Cr3 C, TiO2, ZrO2, Gr, MoS2 and Si3N4 have been used as reinforcements. There are many processing techniques to fabricate metal matrix composites namely stir casting, ultra-sonic assisted casting, compo-casting, rheo casting, powder metallurgy technique, etc,. Among these, stir casting process is the most suitable and economical method to fabricate the metal matrix composites. In this article, an effort has been made to review the work of various researchers to fabricate metal matrix composites through stir casting process.

Mechanical behavior of particle-reinforced polyurethane composites for load-bearing drives

2019 ◽  
Vol 6 (3) ◽  
pp. 33-41
Author(s):  
Anna Porąbka ◽  
Vasiliki-Maria Archodoulaki ◽  
Jadwiga Laska
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Mechanical Behavior ◽  
Reference Materials ◽  
Physical And Mechanical Properties ◽  
Vibration Damping ◽  
Load Bearing ◽  
Ceramic Particles ◽  
Polyurethane Composites ◽  
Properties Of Composites

Two series of polyurethane composites were prepared using NDI- and MDI-based prepolymers and common polyol. NDI-based polyurethane is generally resistant to mechanical wear and rebound-resilient whereas MDI-based PU has cushioning and vibration damping features, and both types can be used as a matrix for load-bearing composites. The objective of this study was to compare the mechanical properties of composites containing 5% vol. of ceramic particles prepared with the use of the mentioned PU systems, and unmodified commercial materials. The effect of various ceramic particles on physical and mechanical properties was studied. The results showed that the mechanical properties changed in comparison to reference materials: E’ improved, and impact strength performed favorably in certain materials. Both the tensile strengths and the elongations at break of the composites were found to decrease with the content of ceramic particles; however, the hardness increased gradually. Since ceramic particles offer better stiffness and hardness, the selected composites could be a viable alternative to the pure commercial PUs available in the industry.

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