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Thickness measurement is one of the commonly used control measurements in sheet metal forming. Ultrasonic thickness measurement systems demand access to the material only from one side which makes them very useful for this purpose. Distortion of grain structure of the workpiece influences ultrasonic velocity and in that way directly influences ultrasonic thickness measurement. Three different ultrasonic thickness measurement systems are examined on the same working sample. Two systems are defined by standard EN14127. The third system is not defined by the standard and includes previously measured ultrasonic velocity in specific direction of grain elongation. Statistical analysis shows relations between measurement results obtained by all three systems and highlights the third system as the most accurate one.
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understanding about work hardening. Metal Forking
Magazine. 2009 Oct 01; 43(9):56-57.
 Haddadi H, Bouvier S, Banu M, Maier C,
Teodosiu C. Towards an accurate description of the
anisotropic behaviour of sheet metals under large
plastic deformations: modelling, numerical analysis
and identification. International Journal of Plasticity.
2006 Dec 31;22(12):2226-71.
 Keran Z, MihaljeviÄ‡ M, Runje B, MarkuÄiÄ D.
Ultrasonic testing of grain distortion direction in cold
formed aluminium profile. Archives of Civil and
Mechanical Engineering. 2017 Feb 28;17(2):375-81.
 Smith RL. Ultrasonic materials characterization.
NDT International. 1987 Feb 1;20(1):43-8.
 EN 14127:2011, Non-destructive testing â€“
Ultrasonic thickness measurement, 2011.
 Nanekar P.P., Shah B.K. Characterization of
material properties by ultrasonics. BARC Newsletter.
Founderâ€™s Day Special Issue. 2004. Issue No.
 Doctor, S. R., T. E. Hall, and L. D. Reid. "SAFTâ€”
the evolution of a signal processing technology for
ultrasonic testing." NDT international 19.3 (1986):
 GÃ¼r CH, Tuncer BO. Characterization of
microstructural phases of steels by sound velocity
measurement. Materials Characterization. 2005 Aug
 Pandey D, Pandey S. Ultrasonics: A technique of
material characterization. INTECH Open Access
Publisher; 2010 Sep.
 Krstelj V., Ultrasonic Control, University of
Zagreb, Faculty of Mechanical Engineering and Naval
Architecture, Zagreb, 2003.
 Green R.E., Ultrasonic Investigation of
Mechanical Properties, Academic Press, New York,
 KrautkrÃ¤mer J, KrautkrÃ¤mer H. Ultrasonic testing of materials. Springer Science & Business Media; 2013 Apr 17.
 de AraÃºjo Freitas VL, de Albuquerque VH, de Macedo Silva E, Silva AA, Tavares JM. Nondestructive characterization of microstructures and determination of elastic properties in plain carbon steel using ultrasonic measurements. Materials Science and Engineering: A. 2010 Jun 25;527(16):4431-7.
 Hirao M, Aoki K, Fukuoka H. Texture of polycrystalline metals characterized by ultrasonic velocity measurements. The Journal of the Acoustical Society of America. 1987 May;81(5):1434-40.
 Palanichamy P, Joseph A, Jayakumar T, Raj B. Ultrasonic velocity measurements for estimation of grain size in austenitic stainless steel. NDT & E International. 1995 Jan 1;28(3):179-85.
 Kupperman DS, Reimann KJ. Ultrasonic wave propagation and anisotropy in austenitic stainless steel weld metal. Argonne National Lab., IL; 1980 Jan 1.