Mechanical Characterization of Functionally Graded Materials with a Yield Strength Gradient

2001 ◽  
Vol 697 ◽  
Author(s):  
A. Nayebi ◽  
G. Mauvoisin ◽  
O. Bartier ◽  
R. El Abdi
Keyword(s):  
Yield Strength ◽  
Yield Stress ◽  
Mechanical Characterization ◽  
Functionally Graded ◽  
Spherical Indentation ◽  
Micro Hardness ◽  
Thermal Hardening ◽  
Graded Materials ◽  
Strength Gradient

AbstractAn elasto-plastic spherical indentation study on materials with a yield strength gradient, like steels which have undergone thermal hardening such as nitriding, is carried out using both experimental and finite element methods. A theory based on the evolution of hardness, is proposed to determine the yield stress and hardness profiles for materials with a decreasing yield stress with depth.Results for carbo-nitriding steels obtained by the standard Vickers micro hardness technique are compared with those obtained by the proposed method.

Microstructure and Mechanical Properties of Graded Materials Prepared by Field-Activated and Pressure-Assisted Combustion Synthesis

2008 ◽  
Vol 368-372 ◽  
pp. 1876-1878 ◽  
Author(s):  
Qing Sen Meng ◽  
Shao Ping Chen ◽  
Y.L. Shen ◽  
Cui Rong Liu ◽  
Z.A. Munir
Keyword(s):  
Combustion Synthesis ◽  
Mechanical Characterization ◽  
Gradient Material ◽  
Micro Hardness ◽  
Hot Press ◽  
Rockwell Hardness ◽  
Graded Materials ◽  
Gradient Materials ◽  
Better Than

Using the processes of field-activated and pressure-assisted combustion synthesis (FAPACS), FGM materials (FGMs) were prepared under the conditions of field-assisted and the hot-press. The microstructure and the phase composition of the interface of the graded materials were investigated and the results showed that the metallurgical joining layer was formed in the interfaces of the (TiB2)pNi/Ni3Al/405 steel. The mechanical characterization of the gradient materials showed that the composition and the micro-hardness of the gradient material were gradient distributed, and its surface Rockwell hardness and wear resistance are better than that of hardened 20Cr steel.

Incremental Melting and Solidification Process/Mechanical Characterization of Functionally Graded Al-Si Alloys

2008 ◽  
Vol 587-588 ◽  
pp. 400-404
Author(s):  
P. Pinto ◽  
L. Mazare ◽  
Delfim Soares ◽  
F.S. Silva
Keyword(s):  
Mechanical Properties ◽  
Functionally Graded Materials ◽  
Phase Distribution ◽  
Solidification Process ◽  
Functionally Graded ◽  
Graded Materials ◽  
Graded Material ◽  
Gradual Variation ◽  
Melting And Solidification

The Incremental Melting and Solidification Process (IMSP) is a relatively new field for material processing for the production of functionally graded materials. In this process a controlled liquid bath is maintained at the top of the component where new materials are added changing the components composition. Thus, a functionally graded material is obtained with a varying composition along one direction of the component. This paper deals with the influence of one of the process parameters, namely displacement rates between heating coil and mould, in order to evaluate its influence on both metallurgical and mechanical properties of different Al-Si alloys. Hardness and phase distribution, along the main castings axis, were measured. To better assess and characterize the process, two different Al-Si alloys with and without variation of chemical composition along the specimen were analysed. Results demonstrate that a gradual variation of metallurgical and mechanical properties along the component is obtained. It is also shown that Al-Si functionally graded materials can be produced by the incremental melting and solidification process. Results show that the displacement rate is very important on metallurgical and mechanical properties of the obtained alloy.

Thermo-mechanical characterization of laser textured LaMgAl11O19/YSZ functionally graded thermal barrier coating

2017 ◽  
Vol 321 ◽  
pp. 146-155 ◽  
Author(s):  
Muhammed Anaz Khan ◽  
Muthukannan Duraiselvam ◽  
S.S. Panwar ◽  
Trilochan Jena ◽  
S.R. Dhineshkumar
Keyword(s):  
Thermal Barrier Coating ◽  
Mechanical Characterization ◽  
Functionally Graded ◽  
Thermal Barrier ◽  
Barrier Coating
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