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ISSN (Print): 2212-7976
ISSN (Online): 1874-477X

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Research Article

Dynamic Constitutive Model and Numerical Simulation of S32760 Duplex Stainless Steel Based on Dislocation Theory

Author(s): Lin Yang*, Heqing Zhang, Minli Zheng, Xiangyuan Zhang, Jialiang Liu, Yinfeng Liu and Fukang Gong

Volume 17, Issue 2, 2024

Published on: 04 December, 2023

Page: [105 - 115] Pages: 11

DOI: 10.2174/0122127976270648231113074331

Price: $65

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Abstract

Background: To describe the complex mechanical behavior of S32760 duplex stainless steel under high strain rate and high-temperature loading conditions.

Objective: The constitutive model of S32760 duplex stainless steel suitable for high strain rate was constructed from the micro-scale.

Methods: Based on the theory of dislocation dynamics, the effects of different strain rates and strains on the plastic deformation of ferrite and austenite were analyzed, and the thermal stress term and non-thermal stress term of ferrite and austenite phases were coupled.

Results: The simulation results of the model show that the S32760 dual-phase constitutive model has a high degree of fit with the experimental data at high strain rates.

Conclusion: Compared with the classical J-C model, the results show that the constitutive model of this patent has more accurate predictability than the J-C model in describing the mechanical behavior of duplex stainless steel in the high strain range of 5000s-1 to 10000s-1.

Keywords: Dislocation dynamics, S32760, constitutive model, high strain rate, hybrid optimization algorithm, duplex stainless steel.

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