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Predicting Flow Curves of Q&P Steel Using Sharp Pyramidal Nanoindentation on Constituent Phases: Isostrain Method

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Abstract:

In this research, a method is presented for predicting macroscopic plastic flow behavior of a quench and partitioning (Q&P) steel using data of nanoindentation experiments.The method is based on Tabor’s model in which nanohardness values obtained with indenters of different angles to be connected to the flow behavior of the indented material. The process consists of two steps: (i) the macroscopic flow relation of each microphases assessed based on the characteristic strain and constraint factor, (ii) the total flow curve of the steel extracted through an isostrain manner. A rationally successful prediction of the macroscopic plastic flow of the Q&P steel is obtained from the constituent phases properties due to consideration of the indentation size effect and application of a rule of-mixture. Eventually, the accuracy of the estimation is verified by comparing the predicted stress-strain curve to the tensile curve obtained from a standard bulk sample.

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Advanced Materials Research Vol. 1160 View Preview

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Periodical:

Advanced Materials Research (Volume 1160)

Pages:

83-91

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1160.83

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Online since:

January 2021

Authors:

M. Karam-Abian, A. Zarei-Hanzaki*, A.H. Shafieizad, A. Zinsaz-Borujerdi, S. Ghodrat

Keywords:

Constituent Phase, Flow Curves, Nanoindentation, Q&P Steel

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* - Corresponding Author

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