Use of Forming Limit Criteria in Forging Complex Shapes From Metal-Matrix Composites

1979 ◽  
Vol 101 (1) ◽  
pp. 3-11 ◽  
Author(s):  
Turgay Ertu¨rk ◽  
Howard A. Kuhn
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Design Method ◽  
Rational Approach ◽  
Forming Limit ◽  
Al Alloy ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Prediction And Prevention ◽  
Complex Shapes

Fundamental deformation and fracture behavior of fiber-reinforced metal-matrix composites under deformation processing conditions were determined using upset tests on rectangular specimens. Defects that occur during simulated forging of a 2024 Al-alloy matrix reinforced with 25v/o stainless steel wires were characterized, and forming limit criteria for their prediction and prevention established. These criteria, determining the limits of deformation, provided guidelines for development of a process for forging an airfoil shape from the composite system studied. To this end, the limiting criteria were combined with an analysis of the flow of metal during forging. The forging design method developed, based on the forming limit criteria, demonstrates a rational approach to the design of processes for forging complex shapes from composite materials. Utilizing this approach, process parameters (die and preform geometry, lubrication) can be evaluated for forging sound complex composite shapes.

Processing of Nickel-Copper Coated Carbon Fibre Rods Reinforced Al6082/4% Al2O3/2%Gr Matrix Composites

2019 ◽  
Vol 969 ◽  
pp. 727-731
Author(s):  
Marise Srinivasu ◽  
R. Suresh ◽  
L. Shivaramu
Keyword(s):  
Carbon Fibre ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Casting Process ◽  
Al Alloy ◽  
Fibre Reinforcement ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Aluminum Metal ◽  
Coated Carbon

Aluminum metal matrix with carbon fibre reinforcement composites are potential materials for automotive, aerospace and electronics industries. The interaction between Al matrix and carbon fibre reinforcement, plays vibrant role to decide the properties of the Metal Matrix Composites (MMC’s). However, interaction between Al alloy matrix and carbon fibre is forming an Aluminum Carbide (Al4C3) at higher temperature (>650°C). This consequence degrades the mechanical properties and promotes corrosion. To overcome corrosion problem and improve the composite properties, metallic coating on carbon rod is very vital. In the present study, aluminum metal matrix composites (Al6082/4%Al2O3+2%Gr) were developed with coated carbon fibre rod using stir casting process. Carbon fibre rods of 3 mm diameter is coated with nickel by electro less process and then copper coating done by electrolytic process. The bonding between matrix and reinforcement was observed in SEM and EDAX analysis. The results indicates the absent of Al4C3 formation.

scholarly journals Tensile and fatigue properties of fiber-reinforced metal matrix composites Cf/5056Al

2021 ◽  
Vol 30 ◽  
pp. 2633366X2092971
Author(s):  
Ying Ba ◽  
Shu Sun
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Strength ◽  
Longitudinal Direction ◽  
Fatigue Properties ◽  
Matrix Composites ◽  
Weak Interface ◽  
Fiber Reinforced ◽  
Alloy Matrix ◽  
Medium Strength

Fiber-reinforced metal matrix composites have mechanical properties highly dependent on directions, possessing high strength and fatigue resistance in fiber longitudinal direction achieved by weak interface bonding. However, the disadvantage of weak interface combination is the reduction of transversal performances. In this article, tensile and fatigue properties of carbon fiber-reinforced 5056 aluminum alloy matrix (Cf/5056Al) composite under the condition of medium-strength interface combination are carried out. The fatigue damage mechanisms of Cf/5056Al composite under tension–tension and tension–compression loads are not the same, but the fatigue life curves are close, which may be the result of the medium-strength interface combination.

Production of Al Metal Matrix Composites by the Stir-Casting Method

2013 ◽  
Vol 592-593 ◽  
pp. 614-617 ◽  
Author(s):  
Konstantinos Anthymidis ◽  
Kostas David ◽  
Pavlos Agrianidis ◽  
Afroditi Trakali
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Automobile Industry ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Casting Method ◽  
Alloy Matrix

It is well known that the addition of ceramic phases in an alloy e.g. aluminum, in form of fibers or particles influences its mechanical properties. This leads to a new generation of materials, which are called metal matrix composites (MMCs). They have found a lot of application during the last twenty-five years due to their low density, high strength and toughness, good fatigue and wear resistance. Aluminum matrix composites reinforced by ceramic particles are well known for their good thermophysical and mechanical properties. As a result, during the last years, there has been a considerable interest in using aluminum metal matrix composites in the automobile industry. Automobile industry use aluminum alloy matrix composites reinforced with SiC or Al2O3 particles for the production of pistons, brake rotors, calipers and liners. However, no reference could be cited in the international literature concerning aluminum reinforced with TiB particles and Fe and Cr, although these composites are very promising for improving the mechanical properties of this metal without significantly alter its corrosion behavior. Several processing techniques have been developed for the production of reinforced aluminum alloys. This paper is concerned with the study of TiB, Fe and Cr reinforced aluminum produced by the stir-casting method.

scholarly journals On the Microstructure, Strength, Fracture, and Tribological Properties of Iron-Based MMCs with Addition of Mixed Carbide Nanoparticulates

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2892 ◽  
Author(s):  
Grzegorz Królczyk ◽  
Eugene Feldshtein ◽  
Larisa Dyachkova ◽  
Mariusz Michalski ◽  
Tomasz Baranowski ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Tribological Properties ◽  
Metal Matrix ◽  
Design Method ◽  
Matrix Composites ◽  
Wear Process ◽  
Lattice Design ◽  
Friction Temperature ◽  
Iron Based ◽  
Fracture Features

In this paper, the features of the strength, fractures, and tribological behavior of metal-matrix composites based on the FeGr1 material are discussed. To improve the material properties, a mixture of SiC, Al2O3 and C nanoparticulates have been added to an iron-based matrix. The simplex lattice design method and hardness, compression, and bending tests were used to determine the mechanical properties. Scanning electron microscopy was applied for fracture features analysis. Different fracture types, mainly trans-crystalline quasi-brittle and brittle fracture or inter-granular fracture and microcracks were registered for the composites tested. Depending on the type and amount of ceramic additives, significant changes in strength, as well as in the fracture features of the metal-matrix composites (MMCs), were observed. Based on tribological tests, changes in the momentary coefficients of friction, temperature of the friction surface, and wear rate of the composites with nanoparticulates were described. An analysis of the worn surface morphology revealed changes in the wear process depending on the MMC composition. It was shown that the use of hybrid mixed additives based on hard ceramic nanoparticulates improved both strength and tribological properties of composites.

Mechanical and microstructural analysis of Al-Al2O3/B4C hybrid composites

2020 ◽  
Vol 234 (12) ◽  
pp. 1503-1514
Author(s):  
Pankaj K Gupta ◽  
MK Gupta
Keyword(s):  
Metal Matrix Composites ◽  
Impact Energy ◽  
Metal Matrix ◽  
Mechanical Performance ◽  
Hybrid Composites ◽  
Microstructural Analysis ◽  
Al Alloy ◽  
Hybridization Technique ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites

The present work aims to enhance the mechanical performance of monolithic Al alloy and single reinforced metal matrix composite using a hybridization technique. The microparticles of alumina and boron carbide were reinforced into cast Al alloy (6061) in a systematic varying ratio (i.e.100/0, 75/25, 50/50, 25/75 and 0/100) to prepare the hybrid metal matrix composites via stir casting method. The mechanical properties (i.e. tensile, impact, hardness and flexural) of the prepared composites were investigated as per ASTM standards. Furthermore, microstructural analysis of unfractured and fractured composite samples was also carried out using Scanning Electron Microscope. It was observed that hybrid composites comprising of microparticles revealed an enhanced tensile, flexural and hardness properties, and reduced impact energy and porosity as compared to Al alloy and single reinforced metal matrix composites. The highest values of tensile strength and modulus were offered by a hybrid composite (B50A50), which was 40% and 52.12% higher than that of Al alloy. Furthermore, there was an improvement of 105.72% in flexural strength and a reduction of 23.88% in impact energy for composite B50A50 than that of Al alloy. The present developed hybrid metal matrix composites can be proposed to be used in automobile parts and construction applications.

Metal matrix composite material reinforced with metal wire and produced with gas metal arc welding

2019 ◽  
Vol 53 (28-30) ◽  
pp. 4411-4426
Author(s):  
Roberta Cristina Silva Moreira ◽  
Oksana Kovalenko ◽  
Daniel Souza ◽  
Ruham Pablo Reis
Keyword(s):  
Metal Matrix Composites ◽  
Arc Welding ◽  
Metal Matrix ◽  
Gas Metal Arc Welding ◽  
Matrix Material ◽  
Metal Wire ◽  
Al Alloy ◽  
Matrix Composites ◽  
Metal Arc Welding ◽  
The Matrix

In the search for high-performance parts and structures, especially for the aviation and aerospace industry, metal matrix composites appear with prominence. However, despite exhibiting high levels of mechanical properties and low densities, these materials are still very expensive, mainly due to complex production. Thus, this work aims to present and evaluate a novel way of manufacturing metal matrix composites, with relative low cost and complexity: by using low-energy fusion welding to deposit the matrix material on top of continuous metal wire reinforcement. For proof of concept, Al alloy was used as matrix material, a single Ti alloy wire as reinforcement, and gas metal arc welding CMT-Pulse® as the process for material deposition. The simplified Al–Ti composite was evaluated in terms of impact resistance and tensile strength and stiffness. Overall, the mechanical performance of the composite was around 23% higher than that of the matrix material itself (Al), this with only about 2% of reinforcement volume and just over 3% of increase in weight. Analyses of the Al–Ti composite fractures and cross-sections and of chemical composition and hardness of the matrix–reinforcement transition interface indicated the preservation (no melting) of the Ti wire and the existence of a fine contour of bonding between matrix and reinforcement. At the end, a brief discussion on the dynamics of the wire reinforcement preservation is carried out based on high-speed filming.

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