scholarly journals Characterization of Mechanical Properties, Macroscopic Deformation Behavior and Microstructure of Functionally Graded 22MnB5 Steel

2021 ◽  
Author(s):  
Emad Scharifi ◽  
Thomas Schade ◽  
Agim Ademaj ◽  
Seyed Vahid Sajadifar ◽  
Ursula Weidig ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Deformation Behavior ◽  
Functionally Graded ◽  
22Mnb5 Steel ◽  
Macroscopic Deformation

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.

scholarly journals Tribological Characterization of Carbon Nanotube/Aluminum Functionally Graded Materials Fabricated by Centrifugal Slurry Methods

2021 ◽  
Vol 5 (10) ◽  
pp. 254
Author(s):  
Hideaki Tsukamoto
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Functionally Graded Materials ◽  
Potassium Carbonate ◽  
High Performance ◽  
Functionally Graded ◽  
Graded Materials ◽  
Tribological Characterization ◽  
Al Matrix

Although carbon nanotube (CNT) is a promising material due to its excellent mechanical and functional properties, CNT has not been effectively used for high performance composites due to the degradation of its mechanical properties as a result of insufficient dispersibility of CNT in its matrix. In this study, CNT/aluminum (Al) matrix functionally graded materials (FGMs) were fabricated by centrifugal slurry methods. The dispersion of CNT was carried out with the solvent of dimethylacetamide (DMAs), and the dispersant of potassium carbonate (K2CO3) under ultrasonic sonication conditions. Tribological characteristics on the FGMs were investigated using a ball-on-disk tribometer. It was demonstrated that the presence of CNT contributed to an increase of the coefficients of friction and an enhancement of wear resistances.

Microstructural Studies and Material Characterization of Alumina Nanoparticulate Reinforced Functionally Graded Al-12Si (wt.%) alloy, produced using Centrifuge Casting Technique

2021 ◽  
Author(s):  
Chethan KS ◽  
Kiran Aithal S ◽  
Manjunath HN ◽  
Ramesh Babu N ◽  
Pavan KN
Keyword(s):  
Mechanical Properties ◽  
Research Work ◽  
Primary Silicon ◽  
Functionally Graded ◽  
Gradual Transition ◽  
Advanced Manufacturing ◽  
Casting Technique ◽  
Casting System ◽  
Microstructural Studies

Abstract The current research work discusses the concept of reinforcing alumina nanoparticulate to Al-12Si (wt.%) alloy using a unique casting technique known as centrifuge casting system established in-house at our advanced manufacturing centre. The resulting cast solid cylindrical specimen will be functionally graded along the length of the specimen containing higher percentage of primary silicon and alumina nanoparticulate at the top region than the bottom region, with a gradual transition in between the two regions. The microstructure of the functionally graded Al-12Si (wt.%) alloy, reinforced with 0.5, 1 and 1.5wt.% of alumina nanoparticulate was analysed using “Scanning Electron Microscope (SEM)” and the elemental composition of the cast specimens were obtained using “Energy-dispersive X-ray analysis (EDX)”. The outcomes of the EDX analysis confirmed the presence of alumina nanoparticulate in the cast specimens. Further, the mechanical properties of the cast Al-12Si (wt.%) alloy, reinforced with alumina nanoparticulate were studied, and it was found that the specimen with the addition of alumina nanoparticulate showed enhanced mechanical properties when compared with the Al-12Si (wt.%) alloy, without alumina nanoparticulate addition, cast under identical conditions.

scholarly journals Mechanical characterization of functionally graded soft materials with ultrasound elastography

2019 ◽  
Vol 377 (2144) ◽  
pp. 20180075 ◽  
Author(s):  
Guo-Yang Li ◽  
Zhao-Yi Zhang ◽  
Jialin Qian ◽  
Yang Zheng ◽  
Wenli Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dispersion Relation ◽  
Soft Tissues ◽  
Mechanical Characterization ◽  
Applied Mathematics ◽  
Soft Materials ◽  
Functionally Graded ◽  
Ultrasound Elastography ◽  
Transient Wave

Functionally graded soft materials (FGSMs) with microstructures and mechanical properties exhibiting gradients across a spatial volume to satisfy specific functions have received interests in recent years. How to characterize the mechanical properties of these FGSMs in vivo/in situ and/or in a non-destructive manner is a great challenge. This paper investigates the use of ultrasound elastography in the mechanical characterization of FGSMs. An efficient finite-element model was built to calculate the dispersion relation for surface waves in FGSMs. For FGSMs with large elastic gradients, the measured dispersion relation can be used to identify mechanical parameters. In the case where the elastic gradient is smaller than a certain critical value calculated here, our analysis on transient wave motion in FGSMs shows that the group velocities measured at different depths can infer the local mechanical properties. Experiments have been performed on polyvinyl alcohol (PVA) cryogel to demonstrate the usefulness of the method. Our analysis and the results may not only find broad applications in mechanical characterization of FGSMs but also facilitate the use of shear wave elastography in clinics because many diseases change the local elastic properties of soft tissues and lead to different material gradients. This article is part of the theme issue ‘Rivlin's legacy in continuum mechanics and applied mathematics’.

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