Effects of TiB2 particle addition on the expansion, structure and mechanical properties of PM Al foams

2004 ◽  
Vol 50 (1) ◽  
pp. 115-119 ◽  
Author(s):  
A.R. Kennedy ◽  
S. Asavavisitchai
Keyword(s):  
Mechanical Properties ◽  
Tib2 Particle ◽  
Particle Addition ◽  
Al Foams

Effect of TiB2 particle addition on the mechanical properties of Al/TiB2 in situ formed metal matrix composites

2018 ◽  
Vol 60 (12) ◽  
pp. 1221-1224 ◽  
Author(s):  
Balachandran Gobalakrishnan ◽  
P. Ramadoss Lakshminarayanan ◽  
Raju Varahamoorthi
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tib2 Particle ◽  
Matrix Composites ◽  
Particle Addition

THE RANDOM POROUS STRUCTURE AND MECHANICAL RESPONSE OF LIGHTWEIGHT ALUMINUM FOAMS

2014 ◽  
Vol 1662 ◽  
Author(s):  
Max Larner ◽  
John Acker ◽  
Lilian P. Dávila
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Relative Density ◽  
Testing Machine ◽  
Sound Insulation ◽  
Full Potential ◽  
Open Cell ◽  
Compressive Loads ◽  
Al Foam ◽  
Al Foams

ABSTRACTLightweight porous foams have been of particular interest in recent years, since they have a very unique set of properties which can be significantly different from their solid parent materials. These properties arise from their random porous structure which is generated through specialized processing techniques. Their unique structure gives these materials interesting properties which allow them to be used in diverse applications. In particular, highly porous Al foams have been used in aircraft components and sound insulation; however due to the difficulty in processing and the random nature of the foams, they are not well understood and thus have not yet been utilized to their full potential. The objective of this study was to integrate experiments and simulations to determine whether a relationship exists between the relative density (porous density/bulk density) and the mechanical properties of open-cell Al foams. Compression experiments were performed using an Instron Universal Testing Machine (IUTM) on ERG Duocel open-cell Al foams with 5.8% relative density, with compressive loads ranging from 0-6 MPa. Foam models were generated using a combination of an open source code, Voro++, and MATLAB. A Finite Element Method (FEM)-based software, COMSOL Multiphysics 4.3, was used to simulate the mechanical behavior of Al foam structures under compressive loads ranging from 0-2 MPa. From these simulated structures, the maximum von Mises stress, volumetric strain, and other properties were calculated. These simulation results were compared against data from compression experiments. CES EduPack software, a materials design program, was also used to estimate the mechanical properties of open-cell foams for values not available experimentally, and for comparison purposes. This program allowed for accurate prediction of the mechanical properties for a given percent density foam, and also provided a baseline for the Al foam samples tested via the IUTM method. Predicted results from CES EduPack indicate that a 5.8% relative density foam will have a Young’s Modulus of 0.02-0.92 GPa while its compressive strength will be 0.34-3.37 MPa. Overall results revealed a relationship between pores per inch and selected mechanical properties of Al foams. The methods developed in this study can be used to efficiently generate open-cell foam models, and to combine experiments and simulations to calculate structure-property relationships and predict yielding and failure, which may help in the pursuit of simulation-based design of metallic foams. This study can help to improve the current methods of characterizing foams and porous materials, and enhance knowledge about theirproperties for novel applications.

THE MECHANICAL PROPERTIES OF POROUS ALUMINUM USING FINITE ELEMENT METHOD SIMULATIONS AND COMPRESSION EXPERIMENTS

2013 ◽  
Vol 1580 ◽  
Author(s):  
Max Larner ◽  
Lilian P. Dávila
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Relative Density ◽  
Alternative Energy ◽  
Sound Insulation ◽  
Full Potential ◽  
Fem Simulations ◽  
Al Foams ◽  
Element Method

ABSTRACTLightweight porous metallic materials are generally created through specialized processing techniques. Their unique structure gives these materials interesting properties which allow them to be used in diverse structural and insulation applications. In particular, highly porous Al structures (Al foams) have been used in aircraft components and sound insulation; however due to the difficulty in processing and random nature of the foams, they are not well understood and thus they have not yet been utilized to their full potential. The objective of this project was to determine whether a relationship exists between the relative density (porous density/bulk density) and the mechanical properties of porous Al structures. For this purpose, a combination of computer simulations and experiments was pursued to better understand possible relationships. A Finite Element Method (FEM)-based software, COMSOL Multiphysics 4.3, was used to model the structure and to simulate the mechanical behavior of porous Al structures under compressive loads ranging from 1-100 MPa. From these simulated structures, the maximum von Mises stress, volumetric strain, and other properties were calculated. These simulation results were compared against data from compression experiments performed using the Instron Universal Testing Machine (IUTM) on porous Al specimens created via a computernumerically-controlled (CNC) mill. CES EduPack software, a materials design program, was also used to estimate the mechanical properties of porous Al and open cell foams for values not available experimentally, and for comparison purposes. This program allowed for accurate prediction of the mechanical properties for a given percent density foam, and also provided a baseline for the solid Al samples tested. The main results from experiments were that the Young’s moduli (E) for porous Al samples (55.8% relative density) were 15.9-16.6 GPa depending on pore diameter, which is in good agreement with the CES EduPack predictions; while the compressive strengths (σc) were 155-185 MPa, higher than those predicted by CES EduPack. The results from the FEM simulations using 3D models (55.8% relative density) revealed the onset of yielding at 13.5-14.0 MPa, which correlates well with CES EduPack data. Overall results indicated that a combination of experiments and FEM simulations can be used to calculate structure-property relationships and to predict yielding and failure, which may help in the pursuit of simulation-based design of metallic foams. In the future, more robust modeling and simulation techniques will be explored, as well as investigating closed cell Al foams and different porous geometries (nm to micron). This study can help to improve the current methods of characterizing porous materials and enhance knowledge about their properties for alternative energy applications, while promoting their design through integrated approaches.

Mechanical properties of martensitic Cu–Zn–Al foams in the pseudoelastic regime

2010 ◽  
Vol 64 (13) ◽  
pp. 1448-1450 ◽  
Author(s):  
G. Bertolino ◽  
P. Arneodo Larochette ◽  
E.M. Castrodeza ◽  
C. Mapelli ◽  
A. Baruj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Al Foams

Effects of in situ TiB2 particle on microstructures and mechanical properties of AZ91 alloy

2010 ◽  
Vol 494 (1-2) ◽  
pp. 94-97 ◽  
Author(s):  
S.-L. Zhang ◽  
Y.-T. Zhao ◽  
G. Chen ◽  
X.-N. Cheng ◽  
C.-J. She ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tib2 Particle ◽  
Az91 Alloy ◽  
Microstructures And Mechanical Properties
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