International Journal of Minerals, Metallurgy and Materials, ( ISI ), Volume (19), No (9), Year (2012-9) , Pages (812-820)

Title : ( Microstructural and mechanical characteristics of Al-alloyed ductile iron upon casting and annealing )

Authors: Nima Haghdadi , B. Bazaz , Hamid Reza Erfanian Nazif Toosi , Ali Reza Kiani Rashid ,

Citation: BibTeX | EndNote

Abstract

Ductile iron containing 6.16wt% Al was produced to investigate the effects of aluminum on both its microstructure and hardness. Aluminum not only increases the nodule count and pearlite content but also improves the hardness in both sand mold and metal mold castings. Annealing treatments were conducted to attain a homogenous microstructure and improve high-temperature serviceability. A ferrite/ carbide or ferritic matrix was gained depending on the annealing temperature. It is also discovered that annealing has inverse influences on the hardness of the bulk alloy and the ferrite phase. Although it causes a small decrease in the bulk hardness of the specimens, it leads to an increase in the microhardness of the ferrite. Micro-segregation of the alloying elements was also investigated by means of electron probe micro-analysis for the specimens with different annealing durations and the as-cast specimen as well. An optimum annealing time was proposed to result in the least amount of micro-segregation of aluminum and silicon between graphite nodules.

Keywords

cast iron; aluminum alloys; casting; annealing; microstructure; hardness
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@article{paperid:1029224,
author = {Haghdadi, Nima and B. Bazaz and Erfanian Nazif Toosi, Hamid Reza and Kiani Rashid, Ali Reza},
title = {Microstructural and mechanical characteristics of Al-alloyed ductile iron upon casting and annealing},
journal = {International Journal of Minerals, Metallurgy and Materials},
year = {2012},
volume = {19},
number = {9},
month = {September},
issn = {1674-4799},
pages = {812--820},
numpages = {8},
keywords = {cast iron; aluminum alloys; casting; annealing; microstructure; hardness},
}

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%0 Journal Article
%T Microstructural and mechanical characteristics of Al-alloyed ductile iron upon casting and annealing
%A Haghdadi, Nima
%A B. Bazaz
%A Erfanian Nazif Toosi, Hamid Reza
%A Kiani Rashid, Ali Reza
%J International Journal of Minerals, Metallurgy and Materials
%@ 1674-4799
%D 2012

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