Study of the Possibilities of Obtaining Powder Materials by Rotational Turning with Multi-Faceted Cutters

2022 ◽  
Vol 1049 ◽  
pp. 62-68
Author(s):  
Aleksandr S. Binchurov ◽  
Yuri Gordeev ◽  
Vladimir Kuleshov ◽  
Andrew Dvoryansky ◽  
Alexei Gribanov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Matrix Material ◽  
Raw Material ◽  
Powder Materials ◽  
High Plasticity ◽  
Metallic Materials ◽  
Specific Strength ◽  
High Specific Strength ◽  
Rotational Turning ◽  
Powder Metallurgy Methods

Composite materials obtained through powder metallurgy methods are increasingly applied in various industries, particularly in aviation and rocket and space equipment which use their high specific strength, resistance to high temperatures and other properties. Producers of composite materials use various metallic and non-metallic materials (fibres and powders) as fillers [1-2]. For example, the high plasticity (moldability) of aluminium powders allows utilizing them as a matrix material in moulding of composites using various methods of rolling, extrusion, and intense plastic deformation [3-5]. However, the widespread use of chip as a raw material for the production of composites is hampered by the complexities in obtaining powders with granules of the necessary shape and size.

Formability Analysis of Fiber Metal Laminates with Different Core and Skin Layers by Stamping Process

2020 ◽  
Vol 982 ◽  
pp. 85-91
Author(s):  
Lei Li ◽  
Li Hui Lang ◽  
Blala Hamza ◽  
Sergei Alexandrov
Keyword(s):  
Complex Shape ◽  
Aerospace Industry ◽  
Skin Layer ◽  
Raw Material ◽  
Forming Limit ◽  
Fiber Metal Laminates ◽  
Specific Strength ◽  
Large Size ◽  
High Specific Strength ◽  
Fiber Metal

Fiber metal laminates (FMLs) are widely used in aerospace industry due to their unique high specific strength, fatigue resistance, corrosion resistance and other excellent characteristics. Thermosetting FMLs is generally used for forming large size parts and rarely used as raw material for producing small size and complex shape parts. This study attempts a methodology that stamping thermosetting FMLs to form cylinder shape parts before the curing process. The forming limit height of FMLs were analyzed by choosing different core materials, layup direction and skin layer thickness. And through the optimization of these variables, a better-quality part has been formed.

On the Flow and Creep Strength of Power Law Materials Containing Rigid Reinforcements

1990 ◽  
Vol 194 ◽  
Author(s):  
Ming Y. He
Keyword(s):  
Power Law ◽  
Creep Strength ◽  
Ceramic Materials ◽  
Al Alloys ◽  
Metallic Materials ◽  
Flow Properties ◽  
Flow Strength ◽  
Specific Strength ◽  
High Specific Strength ◽  
Properties Of Materials

AbstractInvestigation of the flow properties of materials containing rigid reinforcements has been prompted by various technological challenges concerned with high specific strength composites. The materials of interest range from metallic materials such as Al alloys, to ceramic materials such as Si3N4 and also include the intermetallics: TiAl and MoSi2. The reinforcements are typically A12O3 and SiC. The strengths of interest may be the flow strength at ambient temperature or the creep strength. The present analysis constitutes an attempt to provide estimates of either the flow or creep strength for matrices that exhibit power law deformation.

scholarly journals Development and Mechanical Characterization of Al6061-Zircon Composites

2018 ◽  
Vol 7 (3.12) ◽  
pp. 579
Author(s):  
Hemanth Raju.T ◽  
V S.Ramamurthy
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Coefficient Of Thermal Expansion ◽  
Matrix Material ◽  
Stir Casting ◽  
Optical Microscope ◽  
Casting Technique ◽  
Al 6061 ◽  
Specific Strength ◽  
Addition Level

Composite materials are widely used in variety of applications such as aerospace, automotive and structural components resulting in savings of material and energy. Particulate reinforced Aluminium metal matrix composite materials which are having desirable properties such as high specific stiffness, high specific strength, high coefficient of thermal expansion, increased fatigue resistance and superior dimensional stability compared to unreinforced alloys. In the present work an attempt has been made to develop composites using Al 6061 as a matrix material reinforced with Zircon particulates using stir casting technique. The Zircon particulates were varied in steps of 0 %, 3%, 6%, 9% and 12%. The Specimens were prepared as per the ASTM standards. The prepared composites were characterized by microstructural studies using optical microscope and tensile strength and hardness properties were evaluated. Zircon particles were observed to refine the grains and were distributed homogeneously in the aluminium matrix at 9% of Zircon. The tensile and hardness properties were higher in case of composites when compared to unreinforced Al 6061 matrix. Also increasing addition level of Zircon has resulted in further increase in both tensile strength and hardness values and optimum value was obtained at 9% of Zircon. 

Hardening Mechanism through Phase Separation of Beta Ti-35Nb-7Zr-5Ta and Ti-35Nb-7Ta Alloys

2012 ◽  
Vol 1487 ◽  
Author(s):  
C. R. M. Afonso ◽  
P. L. Ferrandini ◽  
R. Caram
Keyword(s):  
Phase Separation ◽  
Biomedical Applications ◽  
Metallic Materials ◽  
High Corrosion Resistance ◽  
Coherent Interface ◽  
Hardening Mechanism ◽  
Specific Strength ◽  
Β Phase ◽  
High Specific Strength ◽  
Low Elastic Modulus

AbstractThe β titanium alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. The aim of this work is the evaluation of hardening mechanism through phase separation in β Ti-35Nb-7Zr-5Ta (TNZT) and Ti-35Nb-7Ta (TNT) alloys. Ingots (50 g) of TNZT and TNT alloys were arc-furnace melted in Ar(g)atmosphere. XRD using synchrotron radiation together with TEM and HRTEM analysis showed the coexistence of two separated phases (β and β’) with similar crystalline structures and slightly different lattice parameters in TNZT and TNT alloys. It was detected a heterogeneous microstructure alternating nanosized dark and bright regions (∼10 nm) with different compositions (Nb-rich β and Ta-Zr-rich β’).In aged condition (400ºC/4h), TNZT and TNT alloys undergoes coherent spinodal decomposition of β phase into two solid solution phases with coherent interface, different compositions and elastic strain associated with nanometric domains of Nb-rich β and Ta-(Zr)-rich β’ phases.

Evaluation of Dimple Treatment for GFRP/Metal Co-Cured Joint

2006 ◽  
Vol 326-328 ◽  
pp. 1729-1732 ◽  
Author(s):  
Roysuke Matsuzaki ◽  
Motoko Shibata ◽  
Akira Todoroki
Keyword(s):  
Composite Materials ◽  
Surface Treatment ◽  
Bonding Strength ◽  
Marine Structures ◽  
Chemical Surface ◽  
Specific Strength ◽  
High Bonding Strength ◽  
High Specific Strength ◽  
Adhesive Surface ◽  
Strength And Stiffness

Since composite materials have high specific strength and stiffness, they are used for many fields such as aerospace and marine structures. According to such utilities, joining method between composites and metals must be developed. In this study, dimple treatment is carried out as a new reinforcing method for FRP/metal co-cured joint. Dimple treatment is applied to the adhesive surface of metal so that resin of FRP permeates into dimples and the strength of joints increases. It is revealed that dimple treatment achieves as high bonding strength as chemical surface treatment.

Comparison of Natural Frequencies of Composite Cylindrical Shells: A Squared Lattice With Its Equivalent Seamless One

2010 ◽  
Author(s):  
M. H. Kargarnovin ◽  
J. E. Jam ◽  
A. H. Hashemian
Keyword(s):  
Composite Materials ◽  
Natural Frequency ◽  
Hollow Cylinder ◽  
Natural Frequencies ◽  
Outer Radius ◽  
Composite Cylinder ◽  
High Extent ◽  
Specific Strength ◽  
High Specific Strength ◽  
Strength And Stiffness

Modern Latticed composite materials whose high specific strength and stiffness are utilized in spacecraft and rocket structures to a sufficiently high extent are now widely used in primary airframe structures. In this work a comparison between squared latticed composite cylinder shells and the equivalent hollow cylinder with same weight, outer radius, length and material is done. An analytical equation is derived for natural frequency of square latticed composite shells. The first fifth modes are taken to be compared. The analytical and FEM results are shown and compared to each other. Also, as discussed, the squared lattice cylinder shell reaches to their natural frequencies easily than the equivalent hollow cylinder shell.

Influence of Misch Metal Addition and Deformation Processes on Microstructure and Mechanical Properties in AZ61 Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 1707-1712 ◽  
Author(s):  
Suk Bong Kang ◽  
Hyoung Wook Kim ◽  
Sang Su Jeong ◽  
Jae Woon Kim
Keyword(s):  
Magnesium Alloys ◽  
Metallic Materials ◽  
Specific Strength ◽  
High Specific Strength ◽  
Misch Metal ◽  
Deformation Processes ◽  
Structural Parts ◽  
Strength And Stiffness ◽  
Metal Addition ◽  
Hexagonal Closed Packed

Magnesium alloys have been known as the best lightweight metallic materials for various applications of electronic equipments and automobile parts due to high specific strength and stiffness. The needs for wrought magnesium alloys have been increased for the application to structural parts in the form of sheets and bars. However, magnesium has a hexagonal closed-packed (HCP) crystal structure with a limited number of operative slip systems at room temperature, and its formability is restricted to mild deformation. The improvement of the formability of magnesium sheets for real applications is important. In order to increase formability of magnesium sheets at elevated temperature, one promising way is a grain refinement.

Improved Structural Joint Concepts

2005 ◽  
Author(s):  
Carl May ◽  
Henry Wilson ◽  
J. Donn Hethcock ◽  
Tim Davis
Keyword(s):  
Composite Materials ◽  
Test Results ◽  
Lap Joint ◽  
Specific Strength ◽  
The Third ◽  
High Specific Strength ◽  
Joint Properties ◽  
Structural Joint ◽  
Structural Engineer ◽  
Materials Used

The joining of composite materials used in airframe structures has always presented a challenge to the structural engineer. As part of a Survivable Affordable Repairable Airframe Program (SARAP) agreement, research on three advanced joining concepts was conducted to identify and validate designs that would provide improved structural efficiency when compared to conventional joining methods. The first involves using finger joints in thin laminates to produce a joint with high specific strength compared to typical joining methods. The second utilizes a derivative of needling for stabilized dry fabric pre-forms to improve through-the-thickness laminate and joint properties. The third concept focuses on compression preload to improve the performance of a typical lap joint. Within each concept, coupon or element tests were used to validate the performance of these alternative configurations. This paper presents both analytical predictions and test results documenting the effects of these improved joining methods.

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