Aluminum and aluminum nitrides effect on nucleation sites in micro-alloyed steel

Abro SH, Chandio A, Siddiqui MA, Channa IA (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Proceedings of the Pakistan Academy of Sciences B - Life and Environmental Sciences Pakistan Academy of Sciences

Book Volume: 56

Pages Range: 1-10

Journal Issue: 3

Abstract

In the present research work an investigation has been taken to understand the effect of aluminum addition on nucleation sites of AlN particles. Two steel samples have been taken with and without aluminum addition. Steel A has no aluminum and steel B has some aluminum added. These samples have been solution heat treated first at 1200°C to dissolve the particles if already present in the steel matrix, and then these samples were heat treated at 710°C, 740°C, 770°C and 800°C respectively with a holding time of 10 to 60 seconds and were then quenched. These samples were then grinded and polished using metallography steps and revealed the microstructure after etching in two solutions Nital and Picric acid simultaneously. After initial interrogation by using the optical micrographs the SEM was utilized to further disclosed the nucleation morphologies. It was found that the 740°C with holding time of 15sec is the most critical stage to observe the nucleation sites. After having the SEM, it was concluded that for steel A, has the most preferable nucleation sites are ferrite and pearlite regions and surprisingly in steel B having aluminum addition the nucleation sites were interface of pro-eutectoid ferrite and pearlite. Optical, SEM and TEM characterization techniques were utilized to study the behavior and morphology.

Authors with CRIS profile

Iftikhar Ahmed Channa Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

NED University of Engineering and Technology / انجنيئرڱ ۽ ٽيڪنالاجي جي جامعہ اين اي ڊي‎ PK Pakistan (PK) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN)

How to cite

APA:

Abro, S.H., Chandio, A., Siddiqui, M.A., & Channa, I.A. (2019). Aluminum and aluminum nitrides effect on nucleation sites in micro-alloyed steel. Proceedings of the Pakistan Academy of Sciences B - Life and Environmental Sciences, 56(3), 1-10.

MLA:

Abro, Shahid Hussain, et al. "Aluminum and aluminum nitrides effect on nucleation sites in micro-alloyed steel." Proceedings of the Pakistan Academy of Sciences B - Life and Environmental Sciences 56.3 (2019): 1-10.

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