The Importance of Rare Earth Contribution from Nodulizing Alloys and their Subsequent Effect on the Inoculation of Ductile Iron

Riposan, Iulian; Chişamera, Mihai; Uta, Valentin; Stan, Stelian; Naro, R. L.; Williams, Dudley

doi:10.1007/bf03355583

Cited by 23 publications

(19 citation statements)

References 4 publications

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“…Choi, et al [11] have reported that the rare earth (RE) elements are helpful in reducing chill and influencing the formation of ferrite. Riposan, et al [12] have investigated that the addition of rare earth elements during in-mould inoculation provides control of casting hardness and improve graphite quality. Ochulor, et al [13] found that two step inoculation methods provide better nodule count and nodularity with 2, 3 and 4 mm thin plate thickness respectively.…”

mentioning

confidence: 99%

Effect of One Step In-Mould Inoculation Method on the Characterization of Thin Wall Ductile Iron

Upadhyaya¹,

Kumar²,

Kumar³

et al. 2018

Int J Metall Met Phys

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Unlike gray iron whose production tends to stagnate, ductile iron enjoy growth exceeding 3% per year [1]. In the recent years basically interest on minimizing the weight of casting components and increasing the mechanical properties. This motivates automobile manufacturers to decrease the weight of automobile leads in the 1970's by reducing the thickness of steel sheets [2-4]. Inoculation which is a means controlling the structure and properties of cast irons by increasing the number of nucleation sites available for the growth of graphite nodules is an

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confidence: 99%

Effect of One Step In-Mould Inoculation Method on the Characterization of Thin Wall Ductile Iron

Upadhyaya¹,

Kumar²,

Kumar³

et al. 2018

Int J Metall Met Phys

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“…Alguns grupos de pesquisa estudaram profundamente a nucleação e o crescimento de grafita em ferros fundidos. Destacam-se os trabalhos de Skaland [3,[5][6][7][8][9][10][11][12][13], Onsoien et al [14][15][16][17], Skjegstad e Skaland [18,19], Gerghu et al [21], Lacaze et al [22], Zhu et al [23], Stefanescu et al [24,25] e Riposan et al [26].…”

Section: Processo De Nodularizaçãounclassified

Estudo Sobre a Nucleação E Crescimento De Nódulos De Grafita Em Ferros Fundidos Nodulares

Vicente¹,

Telles²,

Botelho³

et al. 2019

TMM

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Foram estudadas três corridas comerciais de ferro fundido nodular. Para produção das corridas, partiu-se do mesmo metal base e utilizou-se a mesma liga nodularizante. Cada uma das corridas foi feita com inoculantes diferentes. Os percentuais em peso de inoculante e liga nodularizante foram, respectivamente, 1,0% e 1,3%. Estudou-se a nucleação e o crescimento dos nódulos de grafita. Várias técnicas complementares de análise microestrutural foram utilizadas, tais como microscopia óptica, microscopia eletrônica de varredura (MEV) e espectroscopia de raios-X por dispersão de energia (EDS). Observou-se a sequência de crescimento dos nódulos de grafita, evidenciando-se a formação de silicatos complexos ricos em alumínio, cálcio e bário ao redor dos núcleos, gerando uma interface favorável à solidificação heterogênea de grafita a partir destas partículas de tamanho superior ao raio crítico. Palavras-chave: Ferro fundido nodular; Solidificação heterogênea; Nucleação.

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“…The 2 mm section thickness of EDS morphology inoculated by (a) Ce bearing Fe-Si alloy (b) Zr bearing Fe-Si alloy and (c) Sr bearing Fe-Si alloy at 0.4wt% one step in mould inoculation have been shown in Figure 5. It has been observed that graphite nodularity of Ce bearing Fe-Si alloy has more than Zr bearing Fe-Si alloy and Sr bearing FeSi alloy may due to formation of cerium-calcium-sulphides and oxides during solidification (Riposan, Chisamera, Uta, Stan, Naro, & Williams, 2014;Ochulor, Adeosun, Amuda, & Balogun, 2015).…”

Section: Microscopic Observationmentioning

confidence: 99%

“…It has been observed that Ce bearing Fe-Si alloy for one step in mould inoculation at 0.4wt% contain mainly pearlitic matrix having ultimate tensile strength(UTS) and percentage of elongation are 720 ±3 MPa and 4.5 ±3% which are higher than Zr bearing Fe-Si alloy ( UTS and % elongation are 655 ±5 MPa and 3.3 ±5%) and Sr bearing Fe-Si alloy (UTS and % elongation are 557 ±5 MPa and 2.3 ±5% ) respectively shown in Table 4. (Riposan, Chisamera, Uta, Stan, Naro, & Williams, 2014;Ochulor, Adeosun, Amuda, & Balogun, 2015) reported that carbon diffusion towards graphitization centre may due to formation of cerium-calcium-sulphides and oxides so volume fraction of ferrite increases more and volume fraction of pearlite decreases less in Ce bearing Fe-Si alloy.…”

Section: Tensile Datamentioning

confidence: 99%

“…Choi, Kim, Choi, Kimb, and Rohatgi (2004) have reported that the rare earth (RE) elements are helpful in reducing chill and influencing the formation of ferrite. Riposan, Chisamera, Uta, Stan, Naro, and Williams (2014) have investigated that the addition of rare earth elements during in-mould inoculation provides control of casting hardness and improve graphite quality. Ochulor, Adeosun, Amuda, and Balogun (2015) found that two step inoculation methods provide better nodule count and nodularity with 2, 3 and 4 mm thin plate thickness respectively.…”

Section: Introductionmentioning

confidence: 99%

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Structure Property Correlation of Thin Wall Ductile Iron

Upadhyaya¹,

Singh²

2018

JMSR

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This research work concerns an assessment of the effect of one step inoculation method on thin section castings (2-5) mm analyzed. In this study inoculants representing Ce, Zr and Sr bearing Fe-Si alloys were used. It has been observed that section thickness of 2 mm thin plate containing Ce bearing Fe-Si alloys at 0.4wt% contain mainly pearlitic matrix having microhardness (HV20), ultimate tensile strength (UTS) and percentage of elongation are 272 HV, 720 MPa and 4.5% respectively. It was observed that wear of 2 mm section thickness of thin plate containing Ce bearing Fe-Si alloys have greater wear resistance (272HV) compare to Zr bearing Fe-Si alloys (262HV) and Sr bearing Fe-Si alloys (259HV) respectively at 0.4wt% due to reason of pearlitic and ferritic volume fraction contents present in matrix.

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The Importance of Rare Earth Contribution from Nodulizing Alloys and their Subsequent Effect on the Inoculation of Ductile Iron

Cited by 23 publications

References 4 publications

Effect of One Step In-Mould Inoculation Method on the Characterization of Thin Wall Ductile Iron

Effect of One Step In-Mould Inoculation Method on the Characterization of Thin Wall Ductile Iron

Estudo Sobre a Nucleação E Crescimento De Nódulos De Grafita Em Ferros Fundidos Nodulares

Structure Property Correlation of Thin Wall Ductile Iron

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