Microstructural investigation of SAE 1040 steel specimens by ultrasonic measurements

Date

2005-07-01

Author

Gür, Cemil Hakan

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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 hardness measurements. Then, the velocities of both longitudinal and transversal waves were measured. Backwall echo patterns were obtained to compare the attenuation behaviour. By using the specimens having the same thickness, and by eliminating the effects of grain size and texture, only the influence of microstructural phases on sound velocity and attenuation was investigated. Sound velocity increased as a function of tempering temperature, however no meaningful variation in sound attenuation was observed.

Subject Keywords

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

URI

https://hdl.handle.net/11511/47265

Journal

INSIGHT

DOI

https://doi.org/10.1784/insi.2005.47.7.421

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

C. H. Gür, “Microstructural investigation of SAE 1040 steel specimens by ultrasonic measurements,” INSIGHT, pp. 421–424, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47265.