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Modelling correlation between hot working parameters and flow stress of IN625 alloy using neural network

Montakhab, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1179/174328409X448394
  3. Publisher: 2010
  4. Abstract:
  5. In this work, an optimum multilayer perceptron neural network is developed to model the correlation between hot working parameters (temperature, strain rate and strain) and flow stress of IN625 alloy. Three variations of standard back propagation algorithm (Broyden, Fletcher, Goldfarb and Shanno quasi-Newton, Levenberg-Marquardt and Bayesian) are applied to train the model. The results show that, in this case, the best performance, minimum error and shortest converging time are achieved by the Levenberg-Marquardt training algorithm. Comparing the predicted values and the experimental values reveals that a well trained network is capable of accurately calculating the flow stress of the alloy as a function of the processing parameters. Sensitivity analysis revealed that temperature has the largest effect on the flow stress of the alloy being in good agreement with the metallurgical fundamentals
  6. Keywords:
  7. Superalloy IN625 ; Bayesian ; Broyden ; Experimental values ; Flow stress ; Levenberg-Marquardt ; Levenberg-Marquardt training algorithm ; Multi-layer perceptron neural networks ; Processing parameters ; Quasi-Newton ; Standard back propagation algorithms ; Damage detection ; Hot working ; Plastic flow ; Sensitivity analysis ; Strain rate ; Superalloys ; Neural networks
  8. Source: Materials Science and Technology ; Volume 26, Issue 5 , Jul , 2010 , Pages 621-625 ; 02670836 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1179/174328409X448394?journalCode=ymst20