Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons

Jalava, Kalle; Laine, Jarkko; Vaara, Joona; Frondelius, Tero; Orkas, Juhani

doi:10.1080/02670836.2019.1685760

Cited by 5 publications

(2 citation statements)

References 44 publications

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“…Pearlite is a fine ferrite and cementite (Fe3C) lamellar aggregate. With moderate ductility and high strength, the alloy is relatively hard [4,[13][14][15]. During the design of a new material that is going to be used for structural application, mechanical properties need to be well taken into account.…”

Section: Introductionmentioning

confidence: 99%

“…The microstructure and the nature of the material are extremely important among these factors. Depending on the composition, the matrix structure of ductile iron can be ferritic, pearlitic, bainitic, or martensitic [13][14][15][16]. One of the most commonly encountered industrial problems is wear, particularly through abrasion, leading to frequent replacement of components.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Boulifa

Hadji

2021

Frattura Ed Integrità Strutturale

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In the present work, the influence of alloying elements, on the mechanical characteristics and wear behavior by modification of the chemical composition of the ductile iron was studied, in order to improve these characteristics for the manufacture of agricultural tractors parts in particular front and rear axles, ploughshares, gear crankcase, pinions, transmission shafts, crankshafts, etc... The cast iron investigated was prepared in an induction furnace at 1500°C and inoculated with a ferro-silicon-magnesium to 45% Si and 10% Mg. The specimens were casted into self-hardening sand moulds at 1450°C, after an addition of alloying elements, Manganese (0.6%), Nickel (0.5%), Molybdenum (0.2%) and Vanadium(0.1%)) in the base spheroidal graphite cast iron produced. Various techniques, Optical microscopy, Microhardness, Hardness, Tensile strength, Impact resistance, and Wear tests (Wear resistance and Friction coefficient) were used to characterize these specimens. The obtained results show that the tested samples have ductile iron structures formed by ferrite and pearlite. Moreover, mechanical and wear tests prove that the alloyed cast iron has improved characteristics compared to unalloyed cast iron and shows the positive effect of alloying elements on these characteristics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Boulifa

Hadji

2021

Frattura Ed Integrità Strutturale

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Effects of Static Strain Aging on Mechanical Performance of Ductile Cast Iron

Björklund,

Hänninen,

Bossuyt

2024

J. of Materi Eng and Perform

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EN-GJS-400-15U nodular cast iron intended to be used as load-bearing element in long-term geological disposal canisters containing spent nuclear fuel in Finland and Sweden was studied for static strain aging (SSA). Tensile test specimens manufactured from the nodular cast iron were pre-strained to 1%, 2% and 3% nominal plastic strains. The pre-strained specimens were aged at different temperatures ranging from room temperature to 400 °C for varying times. The aged specimens were tested with conventional tensile testing using constant cross-head speed of 0.016 mm/s. Additionally, four specimens were studied with digital image correlation (DIC) during the tensile testing to obtain full-field strain measurements. SSA resulted in elevated pronounced yield point in all the conditions, while the as-received material showed continuous yielding behavior. SSA reduced the elongation to fracture. DIC tests showed more localized yielding behavior in the SSA specimens. Over-aging effect was observed at 400 °C where increasing pre-strain did not increase the yield stress more. For 1-day aging time, the highest yield stress increment was found after aging at 200°C. The yield stress of the material was almost identical after aging in 100°C and 200°C.

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The Mechanical Properties of Ductile Iron at Intermediate Temperatures: The Effect of Silicon Content and Pearlite Fraction

et al. 2020

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The usage of ductile irons at thermo mechanically loaded components is increasing, necessitating more knowledge of material properties in elevated temperatures. A study of elevated temperature mechanical properties was done, investigating the effect of different pearlite fractions along with silicon content tests in fully ferritic microstructure. Effect of pearlite fraction and silicon content to tensile and yield strength were measured in different temperatures from room temperature up to 450°C. Models were developed, based on those measurements. These resulting regression models were tested with data gathered from literature.These can be used in various design tools, such as FEM calculations and in the optimisation of thermally and cyclic loaded ductile iron components.

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Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons

Cited by 5 publications

References 44 publications

Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Effects of Static Strain Aging on Mechanical Performance of Ductile Cast Iron

The Mechanical Properties of Ductile Iron at Intermediate Temperatures: The Effect of Silicon Content and Pearlite Fraction

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