Comparison of Ultrasonic Impact Treatment (UIT) and Other Fatigue Life Improvement Methods
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Abstract
Considerable recent attention has been paid to investigating the efficiency of ultrasonic impact treatment (UIT) as one of the post-weld methods for improving the reliability and fatigue lives of welded joints. Investigations were carried out at different times in Russia, Ukraine, France, Japan, Norway, Sweden and the USA. The work under review is intended to determine and study the benefits of UIT according to the IIW Collaborative Test Program on Improvement Methods, by comparison with well-known methods for increasing the fatigue strengths of welded joints. The paper presents comparative fatigue test results for welded specimens in the as-welded condition and specimens treated by hammer peening, shot peening, TIG dressing, ultrasonic impact treatment and a combination of TIG dressing and ultrasonic impact treatment. The specimens were fabricated from structural steel (SSAB Weldox 420). It is shown that, by correctly choosing the conditions, UIT can produce the highest improvement in fatigue life.
IIW-Thesaurus keywords
Post weld operations Ultrasonic processing Peening GTA welding Melting, Combined processes Comparisons Fatigue strength Welded joints Structural steels Submerged arc welding Practical investigationsPreview
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References
- 1.Statnikov E. Sh., “Development and study of ultrasonic devices for technological purposes”, AN USSR, doctor’s paper, Moscow, 1982.Google Scholar
- 2.“Improving the fatigue performance of welded joints”, TWI, Cambridge, England: Maddox S. J., Chapter 1, An introduction to the fatigue of welded joints, Haagensen P. J., Chapter 5, Effect of TIG dressing on fatigue performance and hardness of steel weldments.Google Scholar
- 3.Haagensen P. J., “Life improvement and repair of fatigue cracks in welded joints by hammer peening”. Proceedings 14th International Conference Offshore Mechanics and Arctic Engineering, Copenhagen, ASME, Vol. III, 1995, pp. 321–327.Google Scholar
- 4.Lieurade HP., “Fatigue testing of Welded Components”. IIW Doc. XIII-1516, revision 2, May 1995.Google Scholar
- 5.Haagensen P.J., “IIW Collaborative Test Program on Improvement Methods”. IIW Doc. XIII-WG2–30, August 1994.Google Scholar
- 6.Haagensen P.J., “IIW’s Round Robin and Design Recommendations for Improvement Methods”. WRC Proceedings IIW, pp. 305–316.Google Scholar
- 7.Draper N., Smith G., “Applied Regression Analysis”. M: Statistics, 1973, p. 524.Google Scholar