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Mahmoud Sayed Ahmed Soliman

Professor

Professor

كلية الهندسة
Mech. Eng. 2C 60
publication
Journal Article
2014

Austenite Grain Growth Kinetics in API X65 and X70 LinePipe Steels during Isothermal Heating

Almajid, Asiful Hossain Seikh, Mahmoud S. Soliman, Abdulhakim . 2014

The aim of the present work is to investigate the microstructural behavior of austenite grain size (AGS) during the reheating process of two different API steel grades (X65 and X70). The steel samples were austenitized at 1150ºC, 1200ºC and 1250ºC for various holding times from 10 to 60 minutes and quenched in ice water. The samples were then annealed at 500ºC for 24 hours to reveal the prior AGS using optical microscopy. It was noticed that the AGS in X65 grade is coarser than that of X70 grade. Additionally, the grain size increases with increasing the reheating temperature and time for both steels. The kinetics of grain growth was studied using the equation:
 
, where d is the measured grain size, do is  the initial grain size, n is the grain size exponent, t is the heating time, T is the heating temperature, Q is the activation energy, R is the gas constant and A is a constant. To characterize the grain growth process the values of n, Q and A were determined. Good agreement is obtained between the prediction of the model and the experimental grain size values.
 

Publication Work Type
Reseatch project
Volume Number
2014
Magazine \ Newspaper
Advances in Materials Science and Engineering
more of publication
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Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we
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The present investigation deals with a comprehensive study on the production of aluminum based alloys with the incorporation of different alloying elements and their effect on its electrical…

by 1. Hany S. Abdo, Asiful H. Seikh, Jabair Ali Mohammed and Mahmoud S. Soliman
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The aim of the present work is to investigate the microstructural behavior of austenite grain size (AGS) during the reheating process of two different API steel grades (X65 and X70). The steel…

by Asiful Hossain Seikh, Mahmoud S. Soliman, Abdulhakim Almajid
2014