EFFECT OF COOLING RATE ON THE MICROSTRUCTURE AND GRAPHITE MORPHOLOGY IN THE DUCTILE IRON-STEEL HOLLOW SPHERE SYNTACTIC FOAMS

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SAZEGARAN HAMID; POUR MASOUD; HOJATI MILAD

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Journal: METALLURGICAL ENGINEERING Year:2016 | Volume:19 | Issue:1 (61) Page(s): 55-66

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Title

EFFECT OF COOLING RATE ON THE MICROSTRUCTURE AND GRAPHITE MORPHOLOGY IN THE DUCTILE IRON-STEEL HOLLOW SPHERE SYNTACTIC FOAMS

Author(s)

SAZEGARAN HAMID | POUR MASOUD | HOJATI MILAD | Issue Writer Certificate

Keywords

SYNTACTIC FOAMQ2

DUCTILE IRONQ3

STEEL HOLLOW SPHEREQ2

CASTINGQ3

SCANNING ELECTRON MICROSCOPYQ2

Abstract

In this study, DUCTILE IRON-steel hollow sphere SYNTACTIC FOAMs were manufactured through sand mold CASTING technique. The STEEL HOLLOW SPHEREs were synthesized in a fluidized bed. In this process, commercial iron powder was coated on the expanded polystyrene spheres. After coating, de-bonding and sintering processes were carried out. Therefore, the STEEL HOLLOW SPHERE produced with 4, 6, and 8 mm in diameter. Then, the STEEL HOLLOW SPHEREs were randomly filled in the cavities of prepared mold and DUCTILE IRON infiltrated into the interstitial spaces between the spheres. Thus, the DUCTILE IRON- STEEL HOLLOW SPHERE SYNTACTIC FOAMs with 4, 6, and 8 mm spheres sizes were manufactured. Microstructural properties of produced foams were investigated by optical microscopy, SCANNING ELECTRON MICROSCOPY (SEM), and energy dispersive X-ray spectroscopy (EDS). In addition, cooling rates in the SYNTACTIC FOAMs with different sphere sizes were calculated and effects of cooling rate on the graphite morphology and microstructure were studied. The results revealed that decreasing of the spheres size caused to increasing the cooling rate. Furthermore, by increasing the cooling rate, surface fraction of graphite, graphite circularity, and surface fraction of iron carbide decrease and graphite nodule count increases.

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APA: Copy

SAZEGARAN, HAMID, POUR, MASOUD, & HOJATI, MILAD. (2016). EFFECT OF COOLING RATE ON THE MICROSTRUCTURE AND GRAPHITE MORPHOLOGY IN THE DUCTILE IRON-STEEL HOLLOW SPHERE SYNTACTIC FOAMS. METALLURGICAL ENGINEERING, 19(1 (61) ), 55-66. SID. https://sid.ir/paper/112398/en

Vancouver: Copy

SAZEGARAN HAMID, POUR MASOUD, HOJATI MILAD. EFFECT OF COOLING RATE ON THE MICROSTRUCTURE AND GRAPHITE MORPHOLOGY IN THE DUCTILE IRON-STEEL HOLLOW SPHERE SYNTACTIC FOAMS. METALLURGICAL ENGINEERING[Internet]. 2016;19(1 (61) ):55-66. Available from: https://sid.ir/paper/112398/en

IEEE: Copy

HAMID SAZEGARAN, MASOUD POUR, and MILAD HOJATI, “EFFECT OF COOLING RATE ON THE MICROSTRUCTURE AND GRAPHITE MORPHOLOGY IN THE DUCTILE IRON-STEEL HOLLOW SPHERE SYNTACTIC FOAMS,” METALLURGICAL ENGINEERING, vol. 19, no. 1 (61) , pp. 55–66, 2016, [Online]. Available: https://sid.ir/paper/112398/en

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