Nickel Interlayers Boost Bonding and Strength in Hot-Rolled Super Duplex–Carbon Steel Clads
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This study examines the influence of nickel interlayers—battery-grade (BNS) and electroplated (ENS)—on the microstructure and mechanical properties of hot roll cladded Super Duplex Stainless Steel 2507 on Carbon Steel A36. XRD analysis revealed diffusion phases (α-FeNi, MgNi) that improved hardness and bonding, though increased dislocation density and microstrain. Mechanical tests showed enhanced tensile strength (≥ 575 MPa), elastic modulus (2.6 GPa), and hardness (167–289 HV), with reduced elongation (20–23%). Flexural modulus reached 177.5 GPa. Strain rate sensitivity varied, indicating different deformation behaviors. The technique offers a cost-effective solution for durable, corrosion-resistant components in oil and gas environments.
