Non-destructive microstructural characterization of aluminium matrix composites by ultrasonic techniques

Date

2001-11-01

Author

Gür, Cemil Hakan
Ögel, Bilgehan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

66
views

0
downloads

In this study, an attempt was made to correlate the propagation of ultrasonic waves to various microstructural features in Al - SiC composites. The investigated parameters include the volume fraction, size, and distribution of the SiC-reinforcing particulate. Composites were fabricated by hot pressing of Al, Cu, and SiC powders. It has been shown that the ultrasonic velocity in all composites increased with an increase in SiC content. At identical volume fraction, changing the size of SiC particles did not affect the velocity. However, a segregation of SiC particles along the grain boundaries caused a decrease in ultrasonic velocity, which was attributed to the higher amount of residual porosity in segregated structures.

Subject Keywords

Aluminium Matrix Composites, Ultrasonic Velocity, Microstructure

URI

https://hdl.handle.net/11511/48184

Journal

Materials Characterization

DOI

https://doi.org/10.1016/s1044-5803(01)00174-7

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Ultrasonic pulse velocity in concrete using direct and indirect transmission Yaman, İsmail Özgür; Yesiller, Nazli; Aktan, Haluk M. (2001-11-01) The relationship between velocities of ultrasonic stress waves transmitted along direct and indirect paths was investigated. Tests were conducted on plain concrete slabs of dimensions 1000 x 1500 mm, with a thickness of 250 mm. Direct ultrasonic wave transmission tests were conducted between top and bottom surfaces of the slabs and indirect tests were conducted along the slab surface. A test procedure, described in BS 1881 to determine indirect wave velocities, was refined by defining the number and spacing...
Optically stimulated luminescence dating of pottery from Turkey Oke, G; Yurdatapan, E (2000-10-02) In this study, the potential of optically stimulated luminescence (OSL) dating for archaeological potteries was investigated. Firstly, recently purchased OSL and alpha counter systems were calibrated. Then, archaeological sherds taken from Datca-Burgaz (Mugla, Turkey) archaeological site of archaic and classical period (700-400 BC) were dated. Samples were prepared by the fine grain technique and paleodose was found by using the additive dose technique. The annual doses of uranium and thorium were determine...
Low velocity ballistic impact behaviour of the Al-matrix composites Kaya, Seyfi; Ögel, Bilgehan; Yıldırım, Orhan; Department of Metallurgical and Materials Engineering (2002) In this study, a drop-weight set-up was used for low velocity ballistic behaviour of various materials. The test includes the free fall of 5 kg hammer from a height of 4 m and impacting the specimen with a 8 mm diameter punching rod. The criteria in the test is penetration/no penetration as well as the failure mechanism in the tested specimen. The test materials were selected as Ck67 steel, pure Al, and AI-B4C composites. The Ck67 steel plate was quenched and tempered to yield UTS of 800 MPa and higher. Al-...
Development of SERS-active silver nanowire filter foils for pathogen detection in fluids Oğuz, Hilal; Bek, Alpan; Son, Çağdaş Devrim; Department of Micro and Nanotechnology (2022-2) In this study, the signal enhancement in the vicinity of metal nanowires was investigated by using a specific spectroscopic technique called surface-enhanced Raman scattering (SERS). When laser light interacts with roughened or nanostructured metallic surfaces, the interaction causes an increase in electromagnetic field in Raman spectra due to the excitation of surface plasmons in metallic nanostructures. This several orders of signal enhancement provides sensitive detection limits of extremely small amoun...
Two-dimensional transient shear wave propagation in viscoelastic cylindrical layered media Abu-Alshaikh, I; Turhan, D; Mengi, Y (2001-06-06) In this study, propagation of two-dimensional transient shear waves in viscoelastic cylindrical layered media is investigated. The multilayered medium consists of N different isotropic, homogeneous and linearly viscoelastic layers with two discrete relaxation times. A numerical technique which combines the Fourier transform with the method of characteristics is employed to obtain the solutions.

Citation Formats

C. H. Gür and B. Ögel, “Non-destructive microstructural characterization of aluminium matrix composites by ultrasonic techniques,” Materials Characterization, pp. 227–233, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48184.