Study of Tensile Fracture and Interfacial Strength of 316L/Q345R Stainless Steel Composite Plate Based on Molecular Dynamics

L Xie and JH Kang and XF Fu and WR Wang, METALS, 15, 502 (2025).

DOI: 10.3390/met15050502

This study employs molecular dynamics (MD) simulations to investigate the interface adhesive strength of 316L/Q345R stainless steel composite plates. An atomic model of the 316L/Q345R interface was developed, and tensile performance simulations were conducted to analyze the effects of temperature and strain rate on the material's mechanical properties. The results demonstrate that the 316L/Q345R interface exhibits superior strength and plasticity compared to both Q345R and 316L individually, with the interface strength being 19.61% higher than Q345R and 29.98% higher than 316L. The study reveals that the ultimate stress of the interface decreases with increasing temperature in the range of 300 K to 600 K, showing a reduction of approximately 0.06 sigma 0 for every 100 K increase. Additionally, within the strain rate range of 4 x 107 s-1 to 4 x 108 s-1, both the ultimate stress and fracture strain of the interface decrease as the strain rate increases. These findings provide valuable insights into the interface performance of 316L/Q345R stainless steel composite plates, contributing to the understanding of their mechanical behavior under various conditions.

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