Fracture Toughness of Metal Castings

Srinivasan, Mukundhan; Seetharamu, S.

doi:10.5772/50297

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…The case shown in Fig. 21 is typical of the materials susceptible to brittle cracking [13]. It has been demonstrated in [14] that for the 42CrMo4 steel (chemical composition of this steel was similar to the composi- tion of the cast steel subjected to the tests) the values of the KC parameter were differentiated depending on the variation in the phase composition of the microstructure; it has been found that the martensite structure is more susceptible to cracking.…”

Section: Resultsmentioning

confidence: 99%

Operation-Oriented Studies on Wear Properties of Surface-Hardened Alloy Cast Steels Used in Mining in the Conditions of the Combined Action of Dynamic Forces and an Abrasive Material

Wieczorek

2017

Archives of Metallurgy and Materials

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This paper presents the results of wear tests of shot-peened and not shot-peened cast steels used in the mining machinery industry, in particular in the construction of chain drums for armoured face conveyors. Wear tests were carried out in the conditions corresponding to the real operating conditions of armoured face conveyors during drifting work in rocks such as sandstone. The operating factors subjected to the analyses included the presence of quartz abrasive and the impact of external dynamic forces. On the basis of the wear tests as well as the microhardness and microstructure examinations performed, it has been found that the action of an additional dynamic force has a synergistic impact on the process of abrasive wear in loose quartz abrasive. It has been further found that the value of abrasive wear of chain wheels operated in the conditions of a combined action of abrasive and a dynamic force depends on whether the area of mating of wheels with the chain was shot-peened or not before the wear tests -an increase in the abrasive wear was observed for the wheels made of cast steel subjected to shot peening in the area of mating with the chain. Lower resistance to abrasive wear of the cast steels subjected to shot peening before the wear tests could result from the formation of cracks in the surface layer caused by the action of shot.

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Section: Resultsmentioning

confidence: 99%

Operation-Oriented Studies on Wear Properties of Surface-Hardened Alloy Cast Steels Used in Mining in the Conditions of the Combined Action of Dynamic Forces and an Abrasive Material

Wieczorek

2017

Archives of Metallurgy and Materials

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“…The first step in solving mathematical problems regarding the distribution of thermal fields was the calculation of soil freezing, performed in 1890 by I. Stefan [2]. He found that the increase in the thickness of the hardened layer is proportional to the square root of time, and this pattern was repeatedly confirmed in the future [1][2][3][4]. In the 1920s, S. Saito [5] first solved the thermal problem for a hardening metal and took into account the heat release of crystallization.…”

Section: The History Of the Development Of Methods For Calculating Th...mentioning

confidence: 99%

“…? 4 -what value of temperature will be at this moment of contact "metal -mold"? Figure 1 -Scheme for setting the problems of thermal interaction in the system "castings -mold (core)"…”

Section: Statement Of Tasksmentioning

confidence: 99%

Analytical method of calculation of thermal fields in the process of pouring the foundry mold and crystallization of metal

Liutyi

2023

Scientific and Technical Research in the Field of Mechanical Engineering and Transport

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Перший розділ монографії присвячено створенню комплексної математичної методології розрахунку теплових полів у виливках і ливарних стрижнях за системою аналітичних формул. Вперше розроблено комплексну розрахункову методологію визначення теплового поля виливка. Вона заснована на встановленні кінетики охолодження поверхні виливка, просування фронту кристалізації від поверхні до центру виливка, розподілу температур у твердій і рідкій частинах виливка з урахуванням конфігурації лиття. Створена математична методологія є основою для розрахунку теплових полів виливків, ливарних форм і стрижнів. Це дає можливість прогнозувати їх властивості та вибирати оптимальні матеріали. Результати цієї роботи також можуть бути запропоновані як математична основа для удосконалення прикладних комп’ютерних програм для ливарного виробництва.

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“…3 Ductile iron (DI) alloys exhibit significantly lower toughness properties compared to conventional steel alloys, which is due to the notch effect of the graphite phase on the metallic matrix. 4 However, compared to cast iron with lamellar (LGI) and compacted graphite (CGI), DI shows higher toughness properties due to the spherical formation of the graphite phase resulting in a reduced notch effect of the graphite nodules on the surrounding matrix.…”

Section: Introductionmentioning

confidence: 99%

Influence of Graphite-Phase Parameters on the Mechanical Properties of High-Silicon Ductile Iron

2022

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High silicon solid solution-strengthened ductile iron exhibits advantageous combinations of static strength and ductility due to elevated silicon contents. However, the Charpy impact toughness decreases rapidly with increasing silicon content. In particular, the transition temperature between ductile and brittle fracture behaviour is shifted significantly to higher temperatures. Therefore, the optimum adjustment of the graphite phase is of major importance in order to achieve sufficient toughness properties. So far, little is known about the influence of the graphite phase on the toughness properties of high-silicon ductile iron. In the present study, the graphite particle distribution was therefore systematically varied for ductile iron grade EN-GJS-500-14. The effect of the graphite nodule count in the range from 77 to 273 1/mm2, and the influence of the average particle size and particle distance on the Charpy impact energy and the characteristics of the resulting transition curves were investigated by means of statistical analyses. The results that were obtained indicate that the ductile-to-brittle transition temperature in Charpy impact tests can be reduced by about 22 °C by increasing the average nodule count by 100 1/mm2. Additionally, both the lower and upper shelf energies are raised by increasing the nodule count by 100 1/mm2. Based on these results, it becomes apparent to producers that the inoculation technology for toughness-stressed components needs to be specifically considered and adapted.

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Fracture Toughness of Metal Castings

Cited by 8 publications

References 20 publications

Operation-Oriented Studies on Wear Properties of Surface-Hardened Alloy Cast Steels Used in Mining in the Conditions of the Combined Action of Dynamic Forces and an Abrasive Material

Operation-Oriented Studies on Wear Properties of Surface-Hardened Alloy Cast Steels Used in Mining in the Conditions of the Combined Action of Dynamic Forces and an Abrasive Material

Analytical method of calculation of thermal fields in the process of pouring the foundry mold and crystallization of metal

Influence of Graphite-Phase Parameters on the Mechanical Properties of High-Silicon Ductile Iron

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