DESIGN AND FABRICATION OF PORTABLE WELD RESIDUAL STRESS MEASURING DEVICE USING MBN PRINCIPLE

C.E Etin-Osa, J. I. Achebo and K. O. Obahiagbon

Abstract

Residual stress are stresses that remains in an engineering material, especially metallic materials, after the original applied load has been removed. Its measurement will help reveal areas in fabricated materials highly stressed. This paper presents a design of a portable residual stress measuring device based on the magnetic barkhausen noise principle. This was achieved by using two permanent magnets, a pickup coil, amplifier and an analogue to digital converter to create the hardware. The software was designed using LabVIEW 2019. After fabrication, measuring experiments on mild steel materials were conducted and the results obtained from using the device for measurement were compared to simulated values (Simufact.Weld 6.0) CAD software. Comparing its results with that obtained from Simulation showed an R 2 value of 77.47% with a strong correlation of 0.831and a P-value of 0.0071 which was less than the 0.05 alpha level taken. This device can be adopted in weld residual stress measurement by artisans and roadside welders for effective minimization of residual stress and failures associated with it. Read full PDF

Keywords: Labview, Simufact, Residual stress, Barkhausen, Amplifer, Magnet, Weld

References

[1] Akande B.F., Debo-Saiye B., Akinjobi S.D., Alao T.O. and Akinrogunde O.O (2016). Causes, Effects and Remedies to the incessant Building Collapse in Lagos State, Nigeria. International Journal of Basic & Applied Sciences IJBAS-IJENS Vol: 16 No: 04. Pp: 15-30.

[2] Etin-Osa D, Etin-Osa C.E. (2019). “Forensic Science and the Nigerian Society”. Journal of Nuclear Sciences, p-ISSN: 2147-7736, e-ISSN:2148-3981, Available electronically at http:// jns.ankara.edu.tr

[3] Simpson, P.M. (1985): Residual stress analysis of type 304 austenitic stainless steel pipe weldments. Presented at the International Conf. of Exposition on Fatigue, Corrosion, Cracking, Fracture Mechanics Failure Analysis.” 1985, Salt Lake City, USA.

[4] Olabi, A.G., Hashmi, M.S.J (1995): The effect of post-weld heat-treatment on mechanical- properties and residual-stresses mapping in welded structural steel. J Material Process Technology; 55:117–22.

[5] Elgueder J, L. Roucoules, b, E. Rouhaud, c, F. Cochennec. (2011). Integration of residual stresses in the design of mechanical parts. Materials Science Forum Vol. 681 pp 255-260. https://www.scientific.net/MSF.681.255.

[6] Withers P. J and H. K. D. H. Bhadeshia. X Residual stress: Part 1-Measurement techniques. Materials Science and Technology. (2014) 17(4): 355-365.

[7] Hamfelt Jesper (2015). Evaluation of a New Barkhausen Noise Sensor. Luleå University of Technology Department of Computer Science, Electrical and Space Engineering. Available electronically at http://www.diva-portal.org/smash/record.jsf?pid=diva2%3A1021486&dswid=-8335 Accessed on june, 2017

[8] Tomkowski. R, Jonsson .S, Lundin .P, and Nerman .P. (2017) Penetration depth investigation of Barkhausen noise signal for case-hardened components. Conference: 12th International Conference on Barkhasuen Noise and Micromagnetic TestingAt: Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, GermanyVolume: ISBN 978-952-68852-0-9