Zhe Yang , Boxuan Cao , Zhenbao Liu , Yilu Zhao , Jun Wei
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引用次数: 0
Abstract
Overcoming the inherent high susceptibility of hydrogen embrittlement (HE) remains an enduring objective in the development of precipitation hardening stainless steels. This study demonstrates how multi-phase precipitation engineering synergistically enhances hydrogen resistance in duplex-aged Ferrium S53 steel through coupled experiments and simulations. TDS analysis identifies three distinct hydrogen desorption peaks corresponding to trapping at martensitic substructures, austenite interfaces, and nanoprecipitates, with the secondary-aged condition showing enhanced trapping capacity. Microstructural engineering through optimized aging generates high-density M₂C/α'Cr nanoprecipitates and stabilized austenite, shifting hydrogen desorption peaks to higher altitudes and reducing mobile hydrogen populations. Fracture analysis demonstrates the competing roles of plasticity-mediated and decohesion mechanisms, with their relative dominance evidenced by hybrid fracture features combining intergranular cracking with localized plasticity markers. First-principles calculations reveal Mo-modified carbides exhibit reduced vacancy formation barriers while increased hydrogen binding energy. The coordinated microstructure design achieves superior embrittlement resistance through: (i) TDS-verified hydrogen capture at engineered reversible traps, (ii) dislocation pinning that impedes hydrogen transport, and (iii) suppression of critical hydrogen accumulation at vulnerable interfaces. These findings establish a microstructure-property framework for developing hydrogen-resistant alloys via precipitation engineering.
期刊介绍:
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.