Mechanical, wear and heat exposure properties of compacted graphite cast iron at elevated temperatures

Kim, Sug-Won; Cockcroft, S. L.; Omran, A. M.; Hwang, Honam

doi:10.1016/j.jallcom.2009.07.098

Cited by 39 publications

(14 citation statements)

References 13 publications

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“…The cementite could only slip one lamellar spacing, then start to pin the dislocation to avoid its movement. 24,25 Therefore, a smaller lamellar spacing of pearlite can lead to higher tensile strength and impact toughness. This is the main reason that, with the increase in Sn addition from 0?003 to 0?057 wt-%, the tensile strength and impact toughness obviously increased.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of tin on microstructure and mechanical properties of compacted graphite iron

Lyu

Sun

Liu

et al. 2015

International Journal of Cast Metals Research

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This experiment investigated the effect of tin in an amount up to 0?121 wt-% on the microstructure and mechanical properties of compacted graphite iron. Graphite and matrix evolution was emphasised with the help of scanning electron microscopy. The results indicate that Sn in experimental range reduces graphite size. Pearlite quantity would increase with the increasing Sn and reaches over 95% when Sn is .0?057 wt-%. Sn helps to narrow the lamellar spacing of pearlite from sorbitic pearlite (320 nm) to troostitic pearlite (83 nm) when Sn increases from 0?003 to 0?057 wt-%. Appropriate Sn addition promotes the tensile strength and impact toughness, and the samples containing 0?057 wt-%Sn perform the highest values of 410?7 MPa and 9?11 J cm 22 respectively. Elongation declines with increasing Sn content because of the emergence of more pearlite. Samples containing excessive Sn experience sharp deterioration in mechanical properties due to brittle cementite. Y. Lyu et al. Effect of tin on properties of CGI International Journal of Cast Metals Research 2015 VOL NO 3 28 5 265 Downloaded by [University of Sussex Library] at 04:48 22 June 2016 4 Energy dispersive spectroscopy analysis of massive phase in sample containing 0.121 wt-%Sn 6 Lamellar spacing of samples containing a 0.003 wt-%Sn and b 0.057 wt-%Sn 5 Energy dispersive spectroscopy analysis of samples containing 0.092 wt-%Sn Y. Lyu et al. Effect of tin on properties of CGI

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Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of tin on microstructure and mechanical properties of compacted graphite iron

Lyu

Sun

Liu

et al. 2015

International Journal of Cast Metals Research

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“…The increase in Sn content up to 0.1 wt.% will lead to produce pearlitic structure [23]. It is reported that the tensile strength at elevated temperatures rises with the increase in pearlite percentage [24].…”

Section: Tensile Strengthmentioning

confidence: 99%

Effect of alloying elements on thermal shock resistance of gray cast iron

Moonesan

Honarbakhsh-Raouf

Madah

et al. 2012

Journal of Alloys and Compounds

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“…V. graphite cast iron has recently gained renewed popularity owing to its price competitiveness and excellent mechanical and thermal characteristics [6][7][8]. On the basis of its outstanding processibility, thermal conductivity, and wear characteristics [7,9], it has been applied to automobile and railway brake discs.…”

Section: Introductionmentioning

confidence: 99%

“…Kim et al [7] performed mechanical, wear, and heat exposure tests with 4 C. V. graphite cast iron specimens having different perlite fractions and graphite nodularity. However, they did not consider thermal cracking owing to repetitive thermal shock.…”

Section: Introductionmentioning

confidence: 99%

Development of compacted vermicular graphite cast iron for railway brake discs

Lim

Goo

2011

Met. Mater. Int.

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In the case of employing brake discs as a key component of mechanical brake equipment, the initiation of thermal cracking owing to repetitive thermal shock generated during braking may potentially lead to higher maintenance costs, worsened braking performance, and greater risk of railway accidents. The purpose of this study is to gain basic data to facilitate application of compacted vermicular (C. V.) graphite cast iron to brake discs in order to obtain high thermal crack resistance and improved lifetime. To this end, this study developed three types of C. V. graphite cast iron with differing content of key elements, including Ni, Cr, and Mo. Each test specimen underwent numerous tests for evaluation of materials characteristics, and the results were compared with those obtained for existing materials. The test results show that the thermal fatigue lifetime of material C is nearly double that of the conventional material. This demonstrates the suitability of material C as a material for brake discs in mid-to high-speed railway vehicles.

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Mechanical, wear and heat exposure properties of compacted graphite cast iron at elevated temperatures

Cited by 39 publications

References 13 publications

Effect of tin on microstructure and mechanical properties of compacted graphite iron

Effect of tin on microstructure and mechanical properties of compacted graphite iron

Effect of alloying elements on thermal shock resistance of gray cast iron

Development of compacted vermicular graphite cast iron for railway brake discs

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