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Effect of Boron and Cross-Section Thickness on Microstructure and Mechanical Properties of Ductile Iron
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-5635-8023
University of Bologna, Bologna, Italy.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-7527-719X
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
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2018 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 925, p. 249-256Article in journal (Refereed) Published
Abstract [en]

Eeffect of Boron addition on the microstructure and mechanical properties of ductile iron, GJS-500-7 grade was studied. Three cast batches with the Boron content of 10, 49 and 131ppm were cast in a casting geometry containing plates with thicknesses of 7, 15, 30, 50 and 75mm. Microstructure analysis, tensile test, and hardness test were performed on the samples which were machined from the casting plates. Addition of 49 ppm Boron decreased pearlite fraction by an average of 34±6% in all the cast plates. However, minor changes were observed in the pearlite fraction by increasing Boron from 49 to 131 ppm. Variation in the plate thickness did not affect the pearlite fraction. The 0.2% offset yield and ultimate tensile strength was decreased by an average of 11±1% and 18±2%, respectively. Addition of 49 ppm Boron decreased Brinell hardness by 16±1%, while 11±2% reduction was obtained by addition of 131ppm Boron.

Place, publisher, year, edition, pages
Trans Tech Publications, 2018. Vol. 925, p. 249-256
Keywords [en]
Boron, Component Casting, Ductile Iron, Hardness, Mechanical Properties, Spherical Graphite Iron
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-41056DOI: 10.4028/www.scientific.net/MSF.925.249ISI: XYZScopus ID: 2-s2.0-85050012940Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-41056DiVA, id: diva2:1235288
Available from: 2018-07-25 Created: 2018-07-25 Last updated: 2019-01-25Bibliographically approved

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Kasvayee, Keivan AmiriGhassemali, EhsanSvensson, Ingvar L.Jarfors, Anders E.W.

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