تلخیص
HussainAbro1, Mohammed N. Alghamdi2,Hazim Abdulaziz Moria31Department of Materials Eng. NED University of Eng. And Technology, Pakistan. 2,3Mechanical Engineering Department, Yanbu Industrial College, Yanbu Al-Sinaiyah, KSA E-mail: engrabro@neduet.edu.pkAbstractA scientific studyhas been performed in this research work based onexperimental results and ramification to divulge the advancement of second phase particles and theirinfluence on ferrite and austenite phase transformation in less carbon-manganese added steel. Two steelgrades were used steel A and steel B. Steel A has no aluminum,but steel B has aluminum present. To fade out the already present particles, as received,steel under investigation was solution heat-treated at 1200°C. Then both the steel samples were heat treated at 750°C and 810°C under 15, 20, 35, and 70 sec incubation time in the cyanide added liquid bath furnace. Itwasrapidly cooled from the elevated temperature at room temperature in ordinary water.The conventional metallography steps were performed to reveal the microstructure.In two etchant solutions, microstructural features were observed by advanced Olympus optical microscope under polarized light by etching.A scanning electron microscope was used to get the critical micrographs.It was concluded that aluminum combined with nitrogen stimulates the fine aluminum nitride (AlN) particles. These particles were the major source to hinder the grain boundary mobility. Consequently, phase transformation was interrupted in aluminum added steel andloweredthe critical temperatures. Surprisingly there was no such attitude observed without aluminum added steel.
Shahid HussainAbro, , Mohammed N. Alghamdi2, ,Hazim Abdulaziz Moria. (2020) Nano particles effect on transformation behavior as a function of heat treatment of commercial steel used for automobile parts, NUST Journal of Engineering Sciences , Volume 13, Issue 2.
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