Journal Of Applied and Computational Sciences in Mechanics

Journal Of Applied and Computational Sciences in Mechanics

Investigation of Chemical Composition Influence on Mechanical Properties of API X65 Microalloyed Steel

Document Type : Original Article

Authors
Seyyed Hojjat Hashemi
Masood Rakhshkhorshid
10.22067/fum-mech.v23i2.16791
Abstract
A neural network with feed forward topology and back propagation algorithm was used to investigate the effect of composition on mechanical properties in API X65 microalloyed steel (used in manufacturing of large diameter pipes). Experimental data was obtained by cutting 100 specimens from pipes manufactured in industrial scale (with similar heats and manufacturing processes). The chemical analysis and tensile tests were conducted according to the requirements specified by API 5L standard. Scatter diagrams and two statistical criteria: correlation coefficient and mean squared relative error were used to evaluate the prediction performance of developed model. With regard to the satisfactory performance of the developed neural network, it was used then to investigate the effect of Ni, Cu and microalloying elements (Nb + Ti + V + Al) on mechanical properties of test steel.
Keywords
Neural Network
chemical composition
micro-alloying elements
Mechanical properties
API X65 microalloyed steel
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