npj Materials Degradation最新文献

Mechanisms of corrosive freeze-thaw damage in AA7075 using time-resolved x-ray microtomography and correlative electron microscopy

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-27 DOI: 10.1038/s41529-024-00547-6

Ankit Kumar, Eshan Ganju, Daniel Sinclair, Nikhilesh Chawla

{"title":"Mechanisms of corrosive freeze-thaw damage in AA7075 using time-resolved x-ray microtomography and correlative electron microscopy","authors":"Ankit Kumar, Eshan Ganju, Daniel Sinclair, Nikhilesh Chawla","doi":"10.1038/s41529-024-00547-6","DOIUrl":"10.1038/s41529-024-00547-6","url":null,"abstract":"Aluminum aircraft structures experience severe corrosion from exposure to aggressive chloride environments, including cyclic freezing and thawing of residual water during ascent and descent, introducing a cyclic freeze-thaw component to the corrosion process. While corrosion mechanisms in aircraft structures are well studied at constant temperatures, the microstructural and mechanistic behavior under freeze-and-thaw conditions remains unclear. To understand transformations induced by cyclic temperature, we used three-dimensional (3D) x-ray computed tomography (XCT) with scanning electron microscopy (SEM) to study the behavior of AA7075-T651 in a simulated seawater environment undergoing freezing and thawing cycles. Rods immersed in saltwater were thermally cycled above and below freezing, and structural changes were intermittently characterized in 3D. Under freeze-thaw conditions, cracks initiated within corrosion pits through ice expansion, causing progressive crevice growth and spalling along inclusions and grain boundaries with intermediate misorientation angles. Damage mechanisms in freeze-thaw and conventional corrosion environments are compared, with correlations to microstructural evolution.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-12"},"PeriodicalIF":6.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00547-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of intergranular corrosion and self-healing in high temperature aged lean duplex stainless steel 2404

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-20 DOI: 10.1038/s41529-024-00541-y

R. Silva, C. L. Kugelmeier, C. B. Martins Junior, P. H. F. Oliveira, D. C. C. Magalhães, A. H. Plaine, R. Magnabosco, C. A. D. Rovere

{"title":"Mechanisms of intergranular corrosion and self-healing in high temperature aged lean duplex stainless steel 2404","authors":"R. Silva, C. L. Kugelmeier, C. B. Martins Junior, P. H. F. Oliveira, D. C. C. Magalhães, A. H. Plaine, R. Magnabosco, C. A. D. Rovere","doi":"10.1038/s41529-024-00541-y","DOIUrl":"10.1038/s41529-024-00541-y","url":null,"abstract":"This study investigated the intergranular corrosion mechanism of lean duplex stainless steel 2404 after long-term aging at 700 and 800 °C using electrochemical methods, thermodynamic calculations, and kinetic models. At 700 °C, σ phase growth significantly increases the degree of sensitization (DOS) and decreases the breakdown potential (Eb). At 800 °C, a self-healing process at the ferrite/σ interface helps recover Cr and Mo depleted regions, reducing DOS after 72 h of aging and stabilizing Eb after 24 h at higher electrode potentials. However, the corrosion process is intensified at the σ/austenite interface, compromising intergranular corrosion resistance during prolonged aging. The findings show that complete recovery of corrosion resistance via self-healing is not achieved when high fractions of σ phase are formed. In addition, DICTRA calculations effectively evaluate corrosion resistance degradation from σ phase growth, providing deeper insights into the intergranular corrosion mechanism.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-16"},"PeriodicalIF":6.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00541-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feedback effect of the size of mineral particles on the molecular mechanisms employed by Caballeronia mineralivorans PML1(12) to weather minerals

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-20 DOI: 10.1038/s41529-024-00544-9

Cintia Blanco Nouche, Carine Cochet, Marie-Pierre Turpault, Stéphane Uroz

{"title":"Feedback effect of the size of mineral particles on the molecular mechanisms employed by Caballeronia mineralivorans PML1(12) to weather minerals","authors":"Cintia Blanco Nouche, Carine Cochet, Marie-Pierre Turpault, Stéphane Uroz","doi":"10.1038/s41529-024-00544-9","DOIUrl":"10.1038/s41529-024-00544-9","url":null,"abstract":"Mineral dissolution by bacteria is thought to depend on mineral properties, solution chemistry, and the carbon sources metabolized. To investigate whether mineral particle size could impact the effectiveness of weathering and the molecular mechanisms employed by bacteria, the strain Caballeronia mineralivorans PML1(12) was considered. Through microcosm and kinetic experiments, we quantified changes in biotite dissolution, bacterial growth, siderophore biosynthesis, and acidification. The use of different solution chemistries, carbon sources, and particle sizes (from <20 to 500 µm) allowed us to decipher the relative role of acidification- and chelation-driven mineral weathering by bacteria. Results revealed a faster dissolution for smaller particles (<100 µm) that strongly affected both solution chemistry and bacterial physiology, while larger particles (>100 µm) showed a slower and steady dissolution with minimal impact on bacterial processes. These findings underscore the influence and feedback effects of particle size on the dynamics of dissolution and the mechanisms employed by bacteria.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-11"},"PeriodicalIF":6.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00544-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the feasibility of using a data-driven corrosion rate model for optimizing dosages of corrosion inhibitors

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-19 DOI: 10.1038/s41529-024-00545-8

Chamanthi Denisha Jayaweera, David Fernandes del Pozo, Ivaylo Plamenov Hitsov, Maxime Van Haeverbeke, Thomas Diekow, Arne Verliefde, Ingmar Nopens

引用次数: 0

XGBoost model for the quantitative assessment of stress corrosion cracking

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-18 DOI: 10.1038/s41529-024-00538-7

Abraham Rojas Z, Sam Bakhtiari, Chris Aldrich, Victor M. Calo, Mariano Iannuzzi

{"title":"XGBoost model for the quantitative assessment of stress corrosion cracking","authors":"Abraham Rojas Z, Sam Bakhtiari, Chris Aldrich, Victor M. Calo, Mariano Iannuzzi","doi":"10.1038/s41529-024-00538-7","DOIUrl":"10.1038/s41529-024-00538-7","url":null,"abstract":"This study employs a data-driven methodology to assess the susceptibility of Fe-Cr-Ni alloys to stress corrosion cracking (SCC) in chloride-containing environments. Historical data from constant-load SCC testing in boiling magnesium chloride were used to train an XGBoost regression model. This model overcomes limitations related to multicollinearity and insufficient sample sizes seen in previous studies. The XGBoost model captures complex interactions between alloy compositions and stresses, explaining 94.9% (R² = 0.949) of SCC susceptibility of the specimens. Shapley additive explanations (SHAP) were employed to interpret the model, offering new metallurgical insights, such as the critical role of nickel content. The SHAP analysis identified an optimal nickel range between 14.5 and 45 wt%, which markedly enhances SCC resistance. The XGBoost-SHAP framework in this work comprehensively isolates the contributions of chemical constituents and stress, offering a path toward more systematic alloy design—departing from the traditional reliance on trial and error or serendipity.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-19"},"PeriodicalIF":6.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00538-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual anaerobic reactor model to study biofilm and microbiologically influenced corrosion interactions on carbon steel

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-06 DOI: 10.1038/s41529-024-00542-x

Liam Jones, Maria Salta, Torben Lund Skovhus, Kathryn Thomas, Timothy Illson, Julian Wharton, Jeremy Webb

引用次数: 0

Corrosion processes affecting copper-coated used fuel containers for the disposal of spent nuclear fuel: critical review of the state-of-knowledge

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-12-04 DOI: 10.1038/s41529-024-00540-z

Colleen O. Harper, Julie L. Brown, Richard T. Amos

引用次数: 0

Effects of electropolishing and plasma ion nitriding on UNS S31603 corrosion in ship scrubber water

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-30 DOI: 10.1038/s41529-024-00521-2

Hyun-Kyu Hwang, Seong-Jong Kim

引用次数: 0

The effect of antibacterial peptide ε-Polylysine against Pseudomonas aeruginosa biofilm in marine environment

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-29 DOI: 10.1038/s41529-024-00539-6

Siwei Wu, Quantong Jiang, Dongzhu Lu, Xiaofan Zhai, Jizhou Duan, Baorong Hou

{"title":"The effect of antibacterial peptide ε-Polylysine against Pseudomonas aeruginosa biofilm in marine environment","authors":"Siwei Wu, Quantong Jiang, Dongzhu Lu, Xiaofan Zhai, Jizhou Duan, Baorong Hou","doi":"10.1038/s41529-024-00539-6","DOIUrl":"10.1038/s41529-024-00539-6","url":null,"abstract":"Natural antibacterial agents with antimicrobial properties have a broad potential to prevent bacterial from forming biofilms adhesion in marine environments. ε-Polylysine (E-PL) consist of homomeric polymer with 25–30 lysine residues with stability, nontoxicity, and biodegradability. ε-Polylysine is a natural cationic antibacterial peptide that can resist microbial forming biofilm adhesion. The current study investigated the action of E-PL against Pseudomonas aeruginosa biofilm isolated from a marine environment. Crystal violet staining was used to examine the effects of E-PL on the formation and destruction of mature biofilms. Scanning Electron and fluorescence microscopy revealed that E-PL treatment damaged the biofilm structure and affected the secretion of extracellular polymers. The CCK8 colorimetric assay showed that E-PL also decreased the metabolic activity and motility of biofilm bacteria. QPCR and transcriptome analysis revealed that E-PL affected biofilm formation and transcriptional regulation by downregulating genes involved in flagellar synthesis (flgE, PA4651, pilW), chemotaxis transduction (PA1251, PA4951, PA4788), biofilm biosynthesis (pelC, pelD, pslK, plsM), transcriptional regulation (PA3973, PA3508, PA0268), phenazine biosynthesis (phzM, phzH, phzS), and electron transfer (PA5401, PA5400, PA3492). This study used multiple methods to identify the mechanism of E-PL action against biofilm, informing the design of novel biofilm treatment methods.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-11"},"PeriodicalIF":6.6,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00539-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-29 DOI: 10.1038/s41529-024-00543-w

Zeyun Zeng, Shangjun Gu, Jie Wang, Fulong Wei, Xiang Xie, Zhiying Li, Hui Yang, Changrong Li

引用次数: 0