Ultrasonic characterisation of hot-rolled and heat-treated plain carbon steels

Date

2003-09-01

Author

Gür, Cemil Hakan

Metadata

Show full item record

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

Item Usage Stats

155
views

0
downloads

The aim of the study is to characterise hot-rolled and heat-treated plain-C steels (SAE 1020 and 1050) by ultrasonic velocity and attenuation measurements. Various heat treatment procedures were applied by changing the austenitisation temperature and the cooling rate to distinguish the affects of grain size and microstructural phases on ultrasonic properties. Velocities of both longitudinal and transversal waves were measured and backwall echo patterns were obtained for each specimen. The variations in the ultrasonic velocity and attenuation behaviour were discussed considering the microstructural investigations and hardness test results.

Subject Keywords

Mechanical Engineering, Materials Chemistry, Mechanics of Materials, Metals and Alloys

URI

https://hdl.handle.net/11511/37880

Journal

INSIGHT

DOI

https://doi.org/10.1784/insi.45.9.615.52936

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Microstructural investigation of SAE 1040 steel specimens by ultrasonic measurements Gür, Cemil Hakan (British Institute of Non-Destructive Testing (BINDT), 2005-07-01) The aim of this study is to characterise the microstructures of the as-quenched and tempered SAE 1040 steel specimens by sound velocity and attenuation measurements. An initial heat treatment was applied to the specimens to obtain a uniform starting microstructure. Following 850 degrees C/0.5 h austenitisation and water-quenching of all specimens, a tempering process was applied at 200 degrees C and 600 degrees C for 2 h. Microstructures of the specimens were characterised first by metallography and hardnes...
Acoustic phonons scattering mobility and carrier effective mass in In6S7 crystals Qasrawi, A. F.; Hasanlı, Nızamı (Elsevier BV, 2006-12-21) Systematic dark electrical resistivity and Hall coefficient measurements have been carried out in the temperature range of 170-320 K on n-type In6S7 crystals. The analysis of the electrical resistivity and carrier concentration reveals the intrinsic type of conduction with an average energy band gap of similar to 0.75 eV The carrier effective masses of the conduction and valence bands were calculated from the intrinsic temperature-dependent carrier concentration data and were found to be 0.565m(0) and 2.020...
Comparison of magnetic Barkhausen noise and ultrasonic velocity measurements for microstructure evaluation of SAE 1040 and SAE 4140 steels Gür, Cemil Hakan; Çam, İbrahim (Elsevier BV, 2007-05-01) The aim of this study is to compare the performance of magnetic Barkhausen noise and ultrasonic methods for the evaluation of the microstructure of commercial steels. Following the austenitization of the specimens made of SAE 1040 and SAE 4140, various heat treatments were carried out to obtain microstructures consisting of martensite, tempered martensite, fine pearlite-ferrite, and coarse pearlite-ferrite. The microstructures were initially characterized by SEM investigation and hardness measurements. The ...
Seismic performance of chevron braced steel frames with and without viscous fluid dampers as a function of ground motion and damper characteristics Dicleli, Murat (Elsevier BV, 2007-08-01) This study is aimed at comparing the seismic performance of steel chevron braced frames (CBFs) with and without viscous fluid dampers (VFDs) as a function of the intensity and frequency characteristics of the ground motion and VFD parameters. For this purpose, comparative nonlinear time history (NLTH) analyses of single and multiple story CBFs with and without VFDs are conducted using ground motions with various frequency characteristics scaled to represent small, moderate and large intensity earthquakes. A...
Annealing improvement on the localized states of plasma grown boron nitride film assessed through admittance measurements ÖZDEMİR, Orhan; Anutgan, Mustafa; Aliyeva-Anutgan, Tamila; Atilgan, Ismail; Katircioglu, Bayram (Elsevier BV, 2009-05-05) Boron nitride (BN) thin film was grown by plasma enhanced chemical vapor deposition (PECVD) technique and was investigated by UV-Visible transmission, Fourier transform infrared (FTIR) and ac conductance spectroscopies. Mainly the density of electronic localized states (D-it) at BN/Si interface was obtained by continuum and statistical models of ac conductance through an MIS structure (Al/BN film/Si). The origins of the electronic defects have been outlined and discussed within the frame of a nitrogen defic...

Citation Formats

C. H. Gür, “Ultrasonic characterisation of hot-rolled and heat-treated plain carbon steels,” INSIGHT, pp. 615–620, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37880.