Variable amplitude fatigue tests at high frequency hammer peened welded ultra high strength steel S1100

Berg, Joern; Stranghoener, Natalie; Kern, Andreas; Hoevel, Marion

doi:10.1016/j.prostr.2016.06.443

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…The low-alloy ultrahigh-strength steels usually have a martensitic structure, which have high yield strength and hardness, and low plastic toughness [3]. Compared with traditional steels, the welding of low-alloy ultra-high-strength steels is much more difficult, and many welding problems have yet to be solved [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Residual Stress Distribution in NM450TP Wear-Resistant Steel Welded Joints

Gui

Wang

et al. 2022

Crystals

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This study developed a thermo-metallurgical-mechanical simulation method to calculate the temperature field and residual stress distribution in the NM450TP wear-resistant steel welded joints. During the simulation, the solid-state phase transformation and softening effect of NM450TP wear-resistant steel was considered. The simulation results were compared with the experimental results, which verified the feasibility of this method. The influences of solid-state phase transformation and softening effect on the welding residual stress distribution were discussed. The numerical simulation results showed that the solid-state phase transformation had a more significant effect on the magnitude and distribution of the longitudinal residual stress than that of the transverse residual stress. The softening effect had a significant influence on the peak value of the longitudinal residual stress and had little influence on the transverse residual stress. Comparing the numerical simulation results with the experimental results, it could be seen that the calculation results of the welding residual stress were in the best agreement with the experimental measurement results when the solid-state transformation and softening effects were considered at the same time.

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Section: Introductionmentioning

confidence: 99%

Prediction of Residual Stress Distribution in NM450TP Wear-Resistant Steel Welded Joints

Gui

Wang

et al. 2022

Crystals

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Effect of increased yield strength, R-ratio, and plate thickness on the fatigue resistance of high-frequency mechanical impact (HFMI)–treated steel joints

Leitner

Barsoum

2020

Weld World

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In 2016, the International Institute of Welding (IIW) published a recommendation for high-frequency mechanical impact (HFMI) treatment for improving the fatigue strength of welded joints. Since the publication of the HFMI recommendations, numerous of studies have been published with a considerable amount of new fatigue test data focusing on various aspects of the improvement; influence of base material yield strength, and loading and thickness effects. Since the data was scarce covering some of the aspects when the recommendation was published, re-evaluating the recommendation with these new test data, presented within this work, will further validate and extend the recommendations. The analysis reveals that the recommended improvement of fatigue classes based on the base material yield strength is well applicable. In addition, the reduction of fatigue classes for higher R-ratios up to the defined value of R = 0.52 is well considered. Finally, the practicability of the thickness correction factor is also confirmed by leading to a conservative fatigue assessment. The ratio of the statistically evaluated FAT class to the recommended value is shown to be conservative with a value of above one for almost every data set; however, even the ratio is below one in some minor cases, every single test data point in this study is assessed conservatively validating the applicability of the recommendation.

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On the applicability of the hot spot stress method to high strength duplex and carbon steel welded details

Karabulut

Rossi

2021

Engineering Failure Analysis

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Variable amplitude fatigue tests at high frequency hammer peened welded ultra high strength steel S1100

Cited by 6 publications

References 3 publications

Prediction of Residual Stress Distribution in NM450TP Wear-Resistant Steel Welded Joints

Prediction of Residual Stress Distribution in NM450TP Wear-Resistant Steel Welded Joints

Effect of increased yield strength, R-ratio, and plate thickness on the fatigue resistance of high-frequency mechanical impact (HFMI)–treated steel joints

On the applicability of the hot spot stress method to high strength duplex and carbon steel welded details

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