Initiation and early growth of short fatigue cracks at inclusions

Kaynak, Cevdet; Ankara, Alpay; Baker, T. J.

doi:10.1179/026708396790165830

Cited by 26 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can also be seen in the table that most of the largest inclusions correspond to broken particles. From a previous study [19], it is known that the short crack in steel was initiated at the site of elongated As mentioned above, the elongated MnS inclusions in the rolled steel sample have been classified into three groups depending on the broken edges as described abovenamely, UU, UB, and BB. However, a large number of elongated inclusions in the 42CrMo4 rolled steel sample have one or two broken edges.…”

Section: Rs Ps Osmentioning

confidence: 99%

Evaluation of Sulfide Inclusions before and after Deformation of Steel by Using the Electrolytic Extraction Method

Guo

Karasev

Tilliander

et al. 2021

Metals

View full text Add to dashboard Cite

The characteristics of elongated MnS have a critical effect on fatigue anisotropy and all mechanical anisotropies. A comparative investigation of nonmetallic inclusions in both stainless steels and tool steels has been carried out in this study. The inclusion characteristics were investigated using electrolytic extraction (EE) followed by scanning electron microscopy combined with energy-dispersive spectroscopy (SEM-EDS). Overall, three types of MnS inclusions (type I (regular), type II (irregular) and type III (Rod)) were found in tool steels in as-cast samples, which had not been heat-treated. Furthermore, three types of MnS inclusions (Rod-like sulfide (RS), Plate-like sulfide (PS) and Oxysulfide (OS)) were found in samples taken after rolling. Based on the breakability of the elongated MnS, three types of inclusions, Type UU, UB and BB, where U represents the undamaged or unbroken edge of an inclusion and B represents the fragment or broken edge of an inclusion, were studied in both stainless steels and tool steels both before and after additional heat treatment. The effect of heat treatment and dissolving the metal layer during the EE process is also discussed. The results show that both processes have a limited effect on the breakability of inclusions in steels with carbon contents <0.42 mass%.

show abstract

Section: Rs Ps Osmentioning

confidence: 99%

Evaluation of Sulfide Inclusions before and after Deformation of Steel by Using the Electrolytic Extraction Method

Guo

Karasev

Tilliander

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…Ausgehend von den Messergebnissen der Biegeumlaufproben und den Replikas sowie der Literatur [7,9,[14][15][16][17][18][19][20][21][22][23] wurde schematisch in Bild 12 der qualitative Verlauf der Rissfortschrittskurven für die interkritischen Zone und Grobkornzone erstellt.…”

Section: Diskussionunclassified

Influence of welding parameters on the fatigue behaviour of high strength steels

Horn

Panzenböck²,

Clemens

et al. 2013

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In den verschiedensten Bereichen des Maschinenbaus kommen hochfeste mikrolegierte Baustähle zur Anwendung. Als Verbindungstechnik werden vorwiegend Schmelzschweißverfahren eingesetzt. Solche Konstruktionen werden im Wesentlichen dynamischen Beanspruchungen unterworfen. Durch den Einsatz thermischer Fügeverfahren kommt es zur Beeinflussung der Festigkeits‐ und Zähigkeitseigenschaften. In der vorliegenden Arbeit wird der Einfluss der Streckenenergie auf die Änderung der Mikrostruktur eines hochfesten Baustahls (S690) untersucht. Des Weiteren erfolgt die Charakterisierung des Schwingfestigkeitsverhaltens unter Einbeziehung von Rissinitiierung und Rissfortschritt.

show abstract

“…Different surface treatments have been carried out to improve the fatigue life of WCPM friction plates and to change their stress field. The case hardening followed by shot peening (SP) has huge advantages when compared with other surface treatments [5][6][7][8] . Especially, the fatigue damage happens through initiation and propagation of a critical flaw on the component outer layer, e.g.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Controlled Shot Peening on the Microstructure and Fatigue Behavior of Wet Copper-Based Powder Metallurgy Friction Plates

et al. 2018

Mat. Res.

View full text Add to dashboard Cite

The effects of shot peening treatments on the microstructure and fatigue behavior of the teeth root in wet copper-based powder metallurgy friction plates were investigated and an efficient method for selecting optimal shot peening parameters for friction plates was proposed. Different experimental processes including microscopy observation, microhardness, roughness and X-ray diffraction measurements have been performed to characterize the treated surface of specimens. It is found that fatigue life of friction plates firstly increases and then decreases with the increase of Almen intensity, and the optimal fatigue life has improved over 55%. It is considered that both surface grain refinement and high residual compressive stress are the main ingredients responsible for the improved fatigue life. With further increase of Almen intensity, surface roughness of the teeth root gradually increases to a critical point, where rough peened surface may induce crack initiation due to stress concentration, and finally lead fatigue deteriorate.

show abstract

Initiation and early growth of short fatigue cracks at inclusions

Cited by 26 publications

References 6 publications

Evaluation of Sulfide Inclusions before and after Deformation of Steel by Using the Electrolytic Extraction Method

Evaluation of Sulfide Inclusions before and after Deformation of Steel by Using the Electrolytic Extraction Method

Influence of welding parameters on the fatigue behaviour of high strength steels

The Effect of Controlled Shot Peening on the Microstructure and Fatigue Behavior of Wet Copper-Based Powder Metallurgy Friction Plates

Contact Info

Product

Resources

About