Effects of the shape and size of rectangular inclusions on the fatigue cracking behavior of ultra-high strength steels

Yanping, Zeng; Fan, Hongmei; Xie, Xiangyu

doi:10.1007/s12613-013-0735-2

Cited by 14 publications

(5 citation statements)

References 12 publications

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“…Their negative impact on fatigue strength has been widely discussed in the literature [2,15,16], mostly in studies of hard-fatigue steels with low plasticity and inclusions larger than 5 µm. Selected authors have analyzed the purity and fatigue properties of steels with high plasticity [15,[16][17][18][19]. The effect of fine non-metallic inclusions measuring up to 5 µm on the fatigue strength of steel has not been thoroughly investigated.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Fine Non-Metallic Inclusions on the Fatigue Strength of Structural Steel

Lipiński¹,

Wach²

2015

Archives of Metallurgy and Materials

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The article discusses the results of a study investigating the effect of the number of fine non-metallic inclusions (up to 2 µm in size) on the fatigue strength of structural steel during rotary bending. The study was performed on 21 heats produced in an industrial plant. Fourteen heats were produced in 140 ton electric furnaces, and 7 heats were performed in a 100 ton oxygen converter. All heats were desulfurized. Seven heats from electrical furnaces were refined with argon, and heats from the converter were subjected to vacuum circulation degassing.Steel sections with a diameter of 18 mm were hardened and tempered at a temperature of 200, 300, 400, 500 and 600• C. The experimental variants were compared in view of the applied melting technology and heat treatment options. The results were presented graphically, and the fatigue strength of steel with a varied share of non-metallic inclusions was determined during rotary bending. The results revealed that fatigue strength is determined by the relative volume of fine non-metallic inclusions and tempering temperature.Keywords: steel, structural steel, non-metallic inclusions, fatigue strength, bending fatigue, bending pendulum W pracy przedstawiono wyniki badań wpływu ilości drobnych wtrąceń niemetalicznych, o wielkości do 2 µm, na wytrzymałość zmęczeniową przy zginaniu obrotowym. Badania prowadzono na 21 wytopach wyprodukowanych w warunkach przemysłowych. 14 wytopów wykonano w piecach elektrycznych o pojemności 140 ton i 7 wytopów w konwertorze tlenowym o pojemności 100 ton. Wszystkie wytopy poddawano odsiarczaniu. 7 wytopów pochodzących z pieca elektrycznego poddawano rafinacji argonem, zaś wytopy z konwertora odgazowaniu próżniowemu.Odcinki ze stali o średnicy 18 mm hartowano i odpuszczano w temperaturach: 200, 300, 400, 500 lub 600 • C. Warianty badań zestawiono uwzględniając technologię wytapiania stali opcje obróbki cieplnej. Wyniki przedstawiono w graficznej postaci uwzględniającej zależności wytrzymałości zmęczeniowej przy obrotowym zginaniu z udziałem objętościowym wtrąceń niemetalicznych. Wykazano, że wytrzymałość zmęczeniowa zależy od objętości względnej drobnych wtrąceń niemetalicznych, oraz temperatury odpuszczania.

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Section: Introductionmentioning

confidence: 99%

The Effect of Fine Non-Metallic Inclusions on the Fatigue Strength of Structural Steel

Lipiński¹,

Wach²

2015

Archives of Metallurgy and Materials

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“…The morphology and size of heterogeneous phase have a great influence on the properties of materials [17,18]. Figure 8a shows the morphology of some inclusions.…”

Section: Resultsmentioning

confidence: 99%

Study on Hardness, Microstructure, Distribution of the Self-lubricating Phase, Friction and Wear Property of 1Cr13MoS after Heat Treatment

Che

Song

et al. 2019

Materials

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1Cr13MoS is a kind of material with excellent corrosion resistance and good mechanical properties. Meanwhile, it also has good self-lubricating properties due to the presence of molybdenum disulfide phase inside the material and can be used as friction pair material in the pump. In this paper, the hardness, microstructure, distribution of the self-lubricating phase, friction and wear properties of 1Cr13MoS after heat treatment were studied. After quenching at 1000 °C and tempering at 520 °C, the hardness of 1Cr13MoS prepared by pyrometallurgy is higher than that of HB 350. The tempering sorbite structure is evenly distributed, and the self-lubricating phase MoS2 is discretely distributed on the substrate with the average size is about 6 μm, which leads to good friction and wear properties. It is worth noting that the 1Cr13MoS is actually operated as friction pair material on the water pump and has a significant wear improvement effect compared to the conventional 12% chrome steel series.

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“…The identification of the inclusions with the extraction method confirms and defines the morphology of inclusions assessed on fractures. SiO 2 -MgO particles exhibit sharp angles, suggesting therefore they could act as stress concentrators [18] and accelerate the process of fracture. However, this was not just the case.…”

Section: Effect Of Inclusion Shapementioning

confidence: 99%

Influence of steel cleanliness on drawability of fine filaments with high tensile strength

Godon

Antoine

Vogt

et al. 2019

Metall. Res. Technol.

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The aim of the current study is to clarify the influence of steel cleanliness on the fracture during wet wire drawing of high strength high carbon very fine filaments. Methodologies for inclusion identification and for inclusion count were developed. Ninety percent of the fractured filaments were associated with an inclusion which was SiO2, or SiO2-CaO or SiO2-MgO. The fracture of the wires resulted from debonding of the inclusion from the matrix. Inclusion density assessed from total oxygen content in the wire was successfully and reliably obtained. Inclusions exhibited a wide range of sizes but mostly around 6 μm. The inclusion density did not appear as the only parameter that affects the fracture occurrence. An important effect of size and of chemical composition of the inclusions was found. A critical size of inclusions for fracture was observed but it depends on the chemical composition of inclusions.

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Effects of the shape and size of rectangular inclusions on the fatigue cracking behavior of ultra-high strength steels

Cited by 14 publications

References 12 publications

The Effect of Fine Non-Metallic Inclusions on the Fatigue Strength of Structural Steel

The Effect of Fine Non-Metallic Inclusions on the Fatigue Strength of Structural Steel

Study on Hardness, Microstructure, Distribution of the Self-lubricating Phase, Friction and Wear Property of 1Cr13MoS after Heat Treatment

Influence of steel cleanliness on drawability of fine filaments with high tensile strength

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