Pub Date : 2025-02-26DOI: 10.1016/j.corsci.2025.112828
Atharva S. Chikhalikar , Martin Tandler , Daniel E. Mack , Robert Vaßen , David L. Poerschke
This work employs burner rig testing to understand the modes of degradation of a CoNiCrAlY coated superalloy under thermo-cyclic service condition upon exposure to oxide, oxide-sulfate and sulfate deposits. The mixed oxide and oxide-sulfate deposits adhered to the Al2O3 TGO without reacting, likely due to the decomposition of sulfates and sequestration of reactive oxides into silicates. In contrast, sulfate-only deposits readily react with the TGO, forming less-protective calcium aluminates for all cycling conditions. While the TGO on the specimen heat treated isothermally remained protective, increased cycling frequency led to reaction product delamination depleting the Al-reservoir and oxidizing other coating elements.
{"title":"Effect of deposit composition and thermal cycling parameters on oxide- and sulfate-induced hot corrosion of CoNiCrAlY HVOF coatings","authors":"Atharva S. Chikhalikar , Martin Tandler , Daniel E. Mack , Robert Vaßen , David L. Poerschke","doi":"10.1016/j.corsci.2025.112828","DOIUrl":"10.1016/j.corsci.2025.112828","url":null,"abstract":"<div><div>This work employs burner rig testing to understand the modes of degradation of a CoNiCrAlY coated superalloy under thermo-cyclic service condition upon exposure to oxide, oxide-sulfate and sulfate deposits. The mixed oxide and oxide-sulfate deposits adhered to the Al<sub>2</sub>O<sub>3</sub> TGO without reacting, likely due to the decomposition of sulfates and sequestration of reactive oxides into silicates. In contrast, sulfate-only deposits readily react with the TGO, forming less-protective calcium aluminates for all cycling conditions. While the TGO on the specimen heat treated isothermally remained protective, increased cycling frequency led to reaction product delamination depleting the Al-reservoir and oxidizing other coating elements.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112828"},"PeriodicalIF":7.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chemical environment is usually disregarded in stability evaluations of photovoltaic devices but it can be critical for agrivoltaics (dual land use for energy production and agriculture). This work considers for the first time the effect of (NH4)2SO4 agricultural pollutant on the chemical degradation mechanisms of thin layer solar cells. Cu(In,Ga)Se2 (CIGS) cells with the architecture SLG/Mo/CIGS/Zn(O,S)/ZnMgO/Al:ZnO/NiAlNi and representative stacks were characterized at different times of temperature/humidity cyclic aging with and without (NH4)2SO4. The pollutant strongly increased degradation rate and modified the key degradation mechanisms. Cu(In,Ga)Se2-absorber and its interface with Mo-back contact were the most affected by accelerated aging without (NH4)2SO4, while corrosion of front NiAlNi contacts and pitting of window Al-doped ZnO layer was the key degradation mechanism in the presence of (NH4)2SO4. Chemical modifications of the cell and layers were coherent with optoelectrical characteristics loss. The work implies the necessity to take into account specific agricultural pollutants in reliability evaluation of new technologies for agrivoltaic applications.
{"title":"Impact of (NH4)2SO4 agricultural atmospheric pollutant on the degradation mechanisms of thin layer Cu(In,Ga)Se2 solar cells","authors":"Adèle Debono , Noor Fikree , Amelle Rebai , Nathanaelle Schneider , Jean-François Guillemoles , Polina Volovitch","doi":"10.1016/j.corsci.2025.112829","DOIUrl":"10.1016/j.corsci.2025.112829","url":null,"abstract":"<div><div>Chemical environment is usually disregarded in stability evaluations of photovoltaic devices but it can be critical for agrivoltaics (dual land use for energy production and agriculture). This work considers for the first time the effect of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> agricultural pollutant on the chemical degradation mechanisms of thin layer solar cells. Cu(In,Ga)Se<sub>2</sub> (CIGS) cells with the architecture SLG/Mo/CIGS/Zn(O,S)/ZnMgO/Al:ZnO/NiAlNi and representative stacks were characterized at different times of temperature/humidity cyclic aging with and without (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. The pollutant strongly increased degradation rate and modified the key degradation mechanisms. Cu(In,Ga)Se<sub>2</sub>-absorber and its interface with Mo-back contact were the most affected by accelerated aging without (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>, while corrosion of front NiAlNi contacts and pitting of window Al-doped ZnO layer was the key degradation mechanism in the presence of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. Chemical modifications of the cell and layers were coherent with optoelectrical characteristics loss. The work implies the necessity to take into account specific agricultural pollutants in reliability evaluation of new technologies for agrivoltaic applications.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112829"},"PeriodicalIF":7.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-26DOI: 10.1016/j.corsci.2025.112827
Hüseyin Zengin , Achim Walter Hassel
There has been a great need in recent years for a comprehensive understanding of the effects of each rare earth elements (REEs) on the corrosion mechanisms of pure Mg and various Mg alloy systems. In this review, the influences of each REE on the corrosion properties of Mg and its alloys were discussed and the recent research findings in this field were summarized. In addition, the gaps in the existing literature on this subject were highlighted and the alloy design strategies that could enable the development of next-generation REE-containing Mg alloys with superior corrosion performance in the future were suggested.
{"title":"Magnesium alloys with rare earth elements – A review of the recent progress on the corrosion properties","authors":"Hüseyin Zengin , Achim Walter Hassel","doi":"10.1016/j.corsci.2025.112827","DOIUrl":"10.1016/j.corsci.2025.112827","url":null,"abstract":"<div><div>There has been a great need in recent years for a comprehensive understanding of the effects of each rare earth elements (REEs) on the corrosion mechanisms of pure Mg and various Mg alloy systems. In this review, the influences of each REE on the corrosion properties of Mg and its alloys were discussed and the recent research findings in this field were summarized. In addition, the gaps in the existing literature on this subject were highlighted and the alloy design strategies that could enable the development of next-generation REE-containing Mg alloys with superior corrosion performance in the future were suggested.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112827"},"PeriodicalIF":7.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.corsci.2025.112824
Ana Kraš , Davorin Kramar , Ingrid Milošev
This study extended the use of response surface methodology (RSM) to explore the experimental space, identify optimal conditions for deposition and drying, and assess factor interactions for zirconium conversion coatings on aluminium alloy 5754. Corrosion resistance in a dilute Harrison's solution was evaluated using a non-electrochemical drop test and electrochemical techniques. Surface analysis supported the electrochemical findings obtained with the chosen RSM conditions. Unlike zinc and cold-rolled steel, AA5754 exhibits heightened sensitivity to the interplay of pH, conversion time, and H2ZrF6 concentration, which is attributed to the presence of intermetallic particles governing cathodic reactions and the subsequent conversion processes.
{"title":"Experimental approach and assessment of Zr conversion coatings on Al alloy using response surface methodology","authors":"Ana Kraš , Davorin Kramar , Ingrid Milošev","doi":"10.1016/j.corsci.2025.112824","DOIUrl":"10.1016/j.corsci.2025.112824","url":null,"abstract":"<div><div>This study extended the use of response surface methodology (RSM) to explore the experimental space, identify optimal conditions for deposition and drying, and assess factor interactions for zirconium conversion coatings on aluminium alloy 5754. Corrosion resistance in a dilute Harrison's solution was evaluated using a non-electrochemical drop test and electrochemical techniques. Surface analysis supported the electrochemical findings obtained with the chosen RSM conditions. Unlike zinc and cold-rolled steel, AA5754 exhibits heightened sensitivity to the interplay of pH, conversion time, and H<sub>2</sub>ZrF<sub>6</sub> concentration, which is attributed to the presence of intermetallic particles governing cathodic reactions and the subsequent conversion processes.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112824"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.corsci.2025.112825
Shuyi Liu , Yongle Shi , Huifeng Wang , Ning He , Youhui Sun , Huailiang Li , Shuhui Liu , Zhenmin Wang , Chunming Zhang , Yun Fang , Da Li , Kong Bao , Lianyong Xu , Yongdian Han
This study investigates the pitting behavior of the root pass in gas metal arc welded 316L pipelines with and without Argon backing gas. Backing gas improved pitting resistance by reducing oxides that initiate pits. Welds without backing gas showed higher ferrite content and more severe Cr and Mo segregation due to rapid heat transfer, leading to reduced corrosion resistance. The findings underscore the critical role of welding environments, particularly Argon backing, in enhancing pitting corrosion performance by influencing microstructures, inclusions, and passive film properties.
{"title":"Pitting corrosion mechanism of root pass GMAW weld metal in stainless steel pipeline with and without internal Argon filling","authors":"Shuyi Liu , Yongle Shi , Huifeng Wang , Ning He , Youhui Sun , Huailiang Li , Shuhui Liu , Zhenmin Wang , Chunming Zhang , Yun Fang , Da Li , Kong Bao , Lianyong Xu , Yongdian Han","doi":"10.1016/j.corsci.2025.112825","DOIUrl":"10.1016/j.corsci.2025.112825","url":null,"abstract":"<div><div>This study investigates the pitting behavior of the root pass in gas metal arc welded 316L pipelines with and without Argon backing gas. Backing gas improved pitting resistance by reducing oxides that initiate pits. Welds without backing gas showed higher ferrite content and more severe Cr and Mo segregation due to rapid heat transfer, leading to reduced corrosion resistance. The findings underscore the critical role of welding environments, particularly Argon backing, in enhancing pitting corrosion performance by influencing microstructures, inclusions, and passive film properties.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112825"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.corsci.2025.112822
A. Barou , C. Traisnel , C. Charvillat , P. Joly , E. Andrieu , L. Laffont , C. Blanc
This study focused on the low-temperature embrittlement of alloy 82 welds in a simulated PWR primary water environment, and in particular on assessing the influence of pre-exposure on the embrittlement in this environment. In most cases, the hydrogen amount inserted during pre-exposure in the simulated PWR primary water without mechanical loading is low due to the barrier effect of the oxide layer, so it does not significantly influence the tensile behaviour of the welds. On the contrary, hydrogen absorption in the outer layer of the tensile specimens is promoted by the breakdown of the oxide layer when the tensile tests are carried out in the simulated PWR primary water environment. This weakens the outer layer, leading to crack initiation; then, crack propagation is controlled by the hydrogen amount at the crack tip. Hydrogen transport by mobile dislocations and hydrogen diffusion promoted by the dislocation network help to establish the critical amount of hydrogen at the crack tip. In addition, crack propagation is also probably enhanced by the effect of hydrogen on the corrosion behaviour of the weld, i.e., destabilisation of the passive film and increased dissolution processes.
{"title":"Influence of pre-exposure on low-temperature embrittlement of alloy 82 welds in simulated PWR primary water environment","authors":"A. Barou , C. Traisnel , C. Charvillat , P. Joly , E. Andrieu , L. Laffont , C. Blanc","doi":"10.1016/j.corsci.2025.112822","DOIUrl":"10.1016/j.corsci.2025.112822","url":null,"abstract":"<div><div>This study focused on the low-temperature embrittlement of alloy 82 welds in a simulated PWR primary water environment, and in particular on assessing the influence of pre-exposure on the embrittlement in this environment. In most cases, the hydrogen amount inserted during pre-exposure in the simulated PWR primary water without mechanical loading is low due to the barrier effect of the oxide layer, so it does not significantly influence the tensile behaviour of the welds. On the contrary, hydrogen absorption in the outer layer of the tensile specimens is promoted by the breakdown of the oxide layer when the tensile tests are carried out in the simulated PWR primary water environment. This weakens the outer layer, leading to crack initiation; then, crack propagation is controlled by the hydrogen amount at the crack tip. Hydrogen transport by mobile dislocations and hydrogen diffusion promoted by the dislocation network help to establish the critical amount of hydrogen at the crack tip. In addition, crack propagation is also probably enhanced by the effect of hydrogen on the corrosion behaviour of the weld, <em>i.e.,</em> destabilisation of the passive film and increased dissolution processes.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112822"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.corsci.2025.112826
Min Gao , Chijia Wang , Weihao Fan , Haonan Liu , Yue Sun , Qianqian Yin , Zihua Wang , Zhanjian Liu , Ruitao Wang , Huaiyuan Wang
A novel three-dimensional cross-linked network structure is constructed in epoxy coatings through numerous chemical reactions within fillers and between filler and resin. The organic combination between fillers, resins and curing agents improves the coating compactness, the dense and stable "3D network" can effectively shield the CO2 corrosion. Additionally, the excellent toughness of flexible Polyamide modified with polydopamine and the outstanding strength of rigid MoS2 modified with KH560 significantly improve the wear resistance, impact resistance and thermal stability of coating. The EIS results obtain under CO2 environments indicated the mixed coating impedance is approximately 1000 times higher than ordinary coating.
{"title":"Rigid-flexible coupled 3D cross-linked network structure functional coating for corrosion resistance in harsh HPHT-CO2 environments","authors":"Min Gao , Chijia Wang , Weihao Fan , Haonan Liu , Yue Sun , Qianqian Yin , Zihua Wang , Zhanjian Liu , Ruitao Wang , Huaiyuan Wang","doi":"10.1016/j.corsci.2025.112826","DOIUrl":"10.1016/j.corsci.2025.112826","url":null,"abstract":"<div><div>A novel three-dimensional cross-linked network structure is constructed in epoxy coatings through numerous chemical reactions within fillers and between filler and resin. The organic combination between fillers, resins and curing agents improves the coating compactness, the dense and stable \"3D network\" can effectively shield the CO<sub>2</sub> corrosion. Additionally, the excellent toughness of flexible Polyamide modified with polydopamine and the outstanding strength of rigid MoS<sub>2</sub> modified with KH560 significantly improve the wear resistance, impact resistance and thermal stability of coating. The EIS results obtain under CO<sub>2</sub> environments indicated the mixed coating impedance is approximately 1000 times higher than ordinary coating.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112826"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Corrosion of Ni-based alloy steam generator tubes in simulated primary water leads to the formation of oxides on the surface of the tubes and to the release of corrosion products. The oxides formed on two industrial samples were studied using X-ray photoemission spectroscopy and transmission electron microscopy. The morphology, structure and composition of the oxide layers were determined, and the differences observed were discussed in relation to previous analyses on the as-received inner surfaces. A fine grains layer, alumina on the surface of native oxides could influence the behavior of the surface in primary water.
{"title":"XPS and TEM characterization of oxides formed in simulated primary water on steam generator tubes made of Ni based alloy","authors":"Nathan Ribière , Jérôme Esvan , Nathalie Engler , Daniel Brimbal , Milan Skocic , Éric Andrieu , Christine Blanc , Lydia Laffont","doi":"10.1016/j.corsci.2025.112823","DOIUrl":"10.1016/j.corsci.2025.112823","url":null,"abstract":"<div><div>Corrosion of Ni-based alloy steam generator tubes in simulated primary water leads to the formation of oxides on the surface of the tubes and to the release of corrosion products. The oxides formed on two industrial samples were studied using X-ray photoemission spectroscopy and transmission electron microscopy. The morphology, structure and composition of the oxide layers were determined, and the differences observed were discussed in relation to previous analyses on the as-received inner surfaces. A fine grains layer, alumina on the surface of native oxides could influence the behavior of the surface in primary water.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112823"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-22DOI: 10.1016/j.corsci.2025.112812
Ahmed Aliyu, Donald Paul Bishop, Ali Nasiri
In the pursuit of enhancing the corrosion resistance of wire arc additive manufactured nickel aluminum bronze (WAAM-NAB) alloy, this study explores its microstructural evolution and corrosion behavior before and after heat-treatment. The findings unveil that annealing significantly improves the alloy’s microstructure by increasing homogeneity, grain size, and κ-phase distribution, while reducing residual stress and promoting low-energy Σ3–60°//[111] boundaries. These microstructural improvements enhance the alloy’s corrosion resistance in a 3.5 wt% NaCl solution by decreasing susceptibility to localized and galvanic corrosion and promoting stable passive film formation. Consequently, the heat-treated NAB-alloy shows superior corrosion performance, offering greater durability over its as-printed state.
{"title":"Effect of heat treatment on microstructural evolution and corrosion behavior of wire-arc additive manufactured nickel aluminum bronze alloy","authors":"Ahmed Aliyu, Donald Paul Bishop, Ali Nasiri","doi":"10.1016/j.corsci.2025.112812","DOIUrl":"10.1016/j.corsci.2025.112812","url":null,"abstract":"<div><div>In the pursuit of enhancing the corrosion resistance of wire arc additive manufactured nickel aluminum bronze (WAAM-NAB) alloy, this study explores its microstructural evolution and corrosion behavior before and after heat-treatment. The findings unveil that annealing significantly improves the alloy’s microstructure by increasing homogeneity, grain size, and κ-phase distribution, while reducing residual stress and promoting low-energy Σ3–60°//[111] boundaries. These microstructural improvements enhance the alloy’s corrosion resistance in a 3.5 wt% NaCl solution by decreasing susceptibility to localized and galvanic corrosion and promoting stable passive film formation. Consequently, the heat-treated NAB-alloy shows superior corrosion performance, offering greater durability over its as-printed state.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112812"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-22DOI: 10.1016/j.corsci.2025.112814
Chilou Zhou , Xinrui Yan , Yulin Long , Junyang Chen , Xinfeng Li , Xiang Li
The effect of laser power on hydrogen embrittlement (HE) and microstructural evolution in selective laser melted (SLM) 304 L stainless steel was systematically investigated. Slow strain rate tensile (SSRT) tests, X-ray diffraction (XRD), electron backscatter diffraction (EBSD), and hydrogen microprint technique (HMT) were employed to analyze HE susceptibility and mechanism of SLM 304 L. Results show that hydrogen embrittlement resistance decreases with increasing laser power, with 150 W yielding the highest resistance (HEI = 0.963). Microstructural analysis indicated that cellular structures with high-density dislocation walls acted as hydrogen traps, reducing hydrogen accumulation at grain boundaries and suppressing intergranular fracture. Furthermore, increasing laser power led to grain coarsening and a decrease in dislocation density, and promoting HE. These findings provide insight into the correlation between SLM parameters, microstructure, and HE behavior.
{"title":"Effect of laser power on hydrogen embrittlement and microstructural evolution in selective laser melted 304L austenitic stainless steel","authors":"Chilou Zhou , Xinrui Yan , Yulin Long , Junyang Chen , Xinfeng Li , Xiang Li","doi":"10.1016/j.corsci.2025.112814","DOIUrl":"10.1016/j.corsci.2025.112814","url":null,"abstract":"<div><div>The effect of laser power on hydrogen embrittlement (HE) and microstructural evolution in selective laser melted (SLM) 304 L stainless steel was systematically investigated. Slow strain rate tensile (SSRT) tests, X-ray diffraction (XRD), electron backscatter diffraction (EBSD), and hydrogen microprint technique (HMT) were employed to analyze HE susceptibility and mechanism of SLM 304 L. Results show that hydrogen embrittlement resistance decreases with increasing laser power, with 150 W yielding the highest resistance (HEI = 0.963). Microstructural analysis indicated that cellular structures with high-density dislocation walls acted as hydrogen traps, reducing hydrogen accumulation at grain boundaries and suppressing intergranular fracture. Furthermore, increasing laser power led to grain coarsening and a decrease in dislocation density, and promoting HE. These findings provide insight into the correlation between SLM parameters, microstructure, and HE behavior.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112814"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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