Materialwissenschaft und Werkstofftechnik最新文献

{"title":"Microstructural evaluation of 316 L composite coatings reinforced with niobium carbide particle produced by laser cladding\u0000 Gefüge von laserauftraggeschweißten, mit Niobkarbidpartikeln verstärkten 316 L-Verbundwerkstoffbeschichtungen","authors":"L. H. R. Apolinário,&nbsp;H. R. Araújo,&nbsp;I. J. Marques,&nbsp;E. A. Torres,&nbsp;T. F. A. Santos","doi":"10.1002/mawe.202400214","DOIUrl":"https://doi.org/10.1002/mawe.202400214","url":null,"abstract":"<p>The cladding process offers advantages such as low porosity, minimal dilution, low distortion of substrate, small heat-affected zone, contributing to improving the chemical, physical, and mechanical characteristics of the coatings. Carbides, as a reinforcing element, are frequent in applications prone to wear. In this contribution, an ASTM A36 mild steel was coated with a niobium carbide reinforced AISI 316 L powder filler material under multiple laser deposition parameters. The effect of the studied parameters on the produced samples’ microstructure and the evolution of such microstructure were evaluated. The formation of a dendritic solidification substructure, unusual in laser-processed austenitic stainless steel, was observed, which is attributed to the rise in constitutional supercooling due to the increase in the solute concentration because of the niobium carbide dissolution. Deposits with 10 % niobium carbide exhibited an austenite primary and ferrite secondary type solidification, where the δ-ferrite and the eutectic γ-niobium carbide are simultaneously formed, without the precipitation of M₂₃C₆ carbides. In deposits with 30 % niobium carbide, the microstructure observed is like that of 10 % niobium carbide deposits, with the appearance of equiaxial particles of niobium carbide, which grow competitively with the eutectic γ-niobium carbide, without relation to the constitutional supercooling (G/R) but governed by the cooling rate (G.R).</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"419-437"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative study on erosion wear behavior of bilayered high velocity oxy-fuel ceramic coatings on aluminum alloy substrate using granite and quartz erodent\u0000 Vergleichsstudie zum Erosionsverschleißverhalten unter Verwendung von Granit und Quarz von zweischichtigen Hochgeschwindigkeitsflammspritz-Keramikbeschichtungen auf einer Aluminiumlegierung","authors":"A. Vats,&nbsp;A. Patnaik,&nbsp;M. L. Meena,&nbsp;V. Kukshal,&nbsp;T. K. Patnaik","doi":"10.1002/mawe.202400100","DOIUrl":"https://doi.org/10.1002/mawe.202400100","url":null,"abstract":"<p>High velocity oxy-fuel coatings have been sprayed on a novel aluminium (Al) alloy substrate with varying coating thickness and tested for their wear behavior. The air erosion wear test has been conducted on coating samples using Granite stone powder and quartz sand of size up to 75 μm as erodent. The steady state experiments indicate that the greatest specific erosion rate is at 90° for erosion by granite sand and at 60° for erosion by quartz sand. The specific erosion rate decreases with the increase in the thickness of the coatings. Surface topography of the eroded samples indicate an increase in surface roughness at 90° as compared to that at 60° impact angle. Thereafter, Taguchi (L₁₆) orthogonal array is utilized in order to optimize the input parameters. The input parameters are impact velocities, Coating thickness, Erodent feed rate and impact angle. The results from Taguchi experiments find the order of dominance of control factors as: velocity &gt; angle &gt; coating thickness &gt; erodent feed rate for erosion by granite stone and velocity &gt; coating thickness &gt; angle &gt; erodent feed rate for erosion by quartz sand. Coatings have exhibited a semi-ductile wear behavior.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"455-475"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of laser surface polishing on surface topology and residual stress in laser powder bed fusion additively manufactured aluminium-12 silicon part\u0000 Einfluss des Laserstrahloberflächenpolierens auf die Oberflächentopologie und die Eigenspannungen in einem durch Laserstrahl-Pulverbettschmelzen additiv gefertigten AlSi12-Bauteil","authors":"S. K. Balla,&nbsp;R. K. Konki,&nbsp;M. Manjaiah,&nbsp;M. Aqeel,&nbsp;S. M. Shariff","doi":"10.1002/mawe.202400233","DOIUrl":"https://doi.org/10.1002/mawe.202400233","url":null,"abstract":"<p>Laser-assisted additive manufactured surfaces are more often inherently associated with surface and subsurface defects such as poor surface texture, high surface roughness, high tensile residual stress, porosity etc. Depending on the design and methodology adopted, these factors entail limitations in improving the functional properties of additively manufactured parts. Post-processing often becomes mandatory to improve surface finish, residual stresses and other surface-dependent properties. Nowadays, aluminium alloys are widely used for lightweighting in aerospace, aircraft and automotive industries with special emphasis on manufacturing complex design and multi-functional components employing additive manufacturing routes (both laser and non-laser based). The present work aims to demonstrate laser surface polishing (by remelting) of laser-assisted powder bed fusion aluminium-12silicon additively manufactured parts as a viable post-processing technique to improve surface properties. Aluminium-12 silicon cubes printed by laser powder bed fusion at optimum processing conditions having high relative density were stress-relived and subjected to laser surface polishing employing a multi-mode square-beam diode laser under varying energy densities. Results indicated a profound influence of energy density on resulting surface roughness, remelted depth, residual stress and microstructure of laser-assisted powder bed fusion additive manufactured parts. At optimum energy density, the surface roughness of the additive manufactured part was reduced by 82 % with smoothing of initial chaotic texture and reduction in residual tensile stress to zero-level. Indeed, laser surface polishing at optimum energy density enhanced surface and subsurface micro-hardness to 75 HV 0.5 – 100 HV 0.5 from 65 HV 0.5 – 75 HV 0.5 in the initial additive manufactured part on account of refined rapidly solidified structure.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"388-398"},"PeriodicalIF":1.2,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure analysis and processing parameter optimization of AZ31B magnesium alloy during hydromechanical deep drawing\u0000 Gefügeanalyse und Optimierung der Verarbeitungsparameter von MgAl3Zn1-Magnesiumlegierung beim hydromechanischen Tiefziehen","authors":"G. Cai,&nbsp;Z. Jing,&nbsp;Y. Pan,&nbsp;B. Wang","doi":"10.1002/mawe.202400176","DOIUrl":"https://doi.org/10.1002/mawe.202400176","url":null,"abstract":"<p>This research is an integrated study on the hydromechanical deep drawing processing of AZ31B magnesium alloy at elevated temperatures. Considering the process parameters such as friction coefficient, blank holder force and pressure rate, simulation and experiment were carried out. At the same time, the minimum thickness of the cylindrical parts was selected as the response, and a series of experiments were carried out by Box-Bhenken design, including response surface method and variance analysis. The optimal combination of processing parameters was obtained by the established model. Combined with the optimized process parameters, the AZ31B magnesium alloy cylindrical parts formed by the testing machine were tested and evaluated. The results verified the correctness of the prediction model, and the error between the experimental results and the predicted simulation results was within 5 %. The wall thickness distribution was uniform and the forming quality was good. In addition, the scanning electron microscope experiment was carried out on the best cylindrical parts, and the microstructure evolution of different regions of the parts was discussed in depth.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"328-338"},"PeriodicalIF":1.2,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover Picture: (Materialwiss. Werkstofftech. 2/2025)","authors":"","doi":"10.1002/mawe.202580201","DOIUrl":"https://doi.org/10.1002/mawe.202580201","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"165"},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202580201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impressum: Materialwiss. Werkstofftech. 2/2025","authors":"","doi":"10.1002/mawe.202580221","DOIUrl":"https://doi.org/10.1002/mawe.202580221","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"166"},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202580221","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Materialwiss. Werkstofftech. 2/2025","authors":"","doi":"10.1002/mawe.202580211","DOIUrl":"https://doi.org/10.1002/mawe.202580211","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"167-172"},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas tungsten arc welding of titanium tube: Microstructure, mechanical properties and numerical prediction of tensile strength\u0000 Wolframinertgasschweißen von Titanrohren: Gefüge, mechanische Eigenschaften und numerische Vorhersage der Zugfestigkeit","authors":"K. G. Kamal,&nbsp;R. Perumal,&nbsp;M. K. Subramaniyan,&nbsp;D. Veeman","doi":"10.1002/mawe.202400195","DOIUrl":"https://doi.org/10.1002/mawe.202400195","url":null,"abstract":"<p>Commercially pure titanium-grade 2 tube was fabricated using gas tungsten arc welding, which yielded perfect welds suitable for usage in several industries. Through conducting extensive testing and determining the optimal process parameters, this approach was optimized. The welded microstructure of the material was analyzed using optical microscopy which revealed columnar and equiaxed dendrites that were primarily composed of α and β-Titanium phases. These microstructural modifications, the product of constitutional supercooling and thermal histories, have significantly improved the mechanical properties of the welded pipe. The tensile strength increased by 3 % to 360.52 MPa ±2.5 MPa, while the strength of the base metal was 350.01 MPa ±2.5 MPa. Significantly, the welded pipe outperformed the base metal in terms of mechanical strength, and a 180° bend test demonstrated its ductility by obviating any signs of fracture. Microhardness evaluations showed that the weld metal had maximum values (172 HV 0.5 to 195 HV 0.5) while the base metal area had lower values (150 HV 0.5 to 157 HV 0.5). This in-depth examination demonstrates potential of commercially pure titanium-grade 2 for a range of industrial uses and offers insight into effective production of the material via gas tungsten arc welding.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"256-265"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tungsten inert gas welding of zircaloy sheet: Mechanical properties and microstructural characterization\u0000 Wolframinertgasschweißen von Zirkoniumlegierungsblechen: Mechanische Eigenschaften und mikrostrukturelle Charakterisierung","authors":"V. Munusamy,&nbsp;G. Raju,&nbsp;D. Veeman,&nbsp;M. K. Subramaniyan","doi":"10.1002/mawe.202400141","DOIUrl":"https://doi.org/10.1002/mawe.202400141","url":null,"abstract":"<p>A zirconium-based alloy called zircaloy-2 is well known for its exceptional resistance to corrosion and low cross-sectional absorption of neutrons, which makes it a vital component for fuel cladding application in the nuclear industry. Tungsten inert gas welding is an effective method for joining zircaloy due to its precise heat control and inert gas shielding, ensuring high-quality welds with minimal contamination. This technique is particularly advantageous for applications demanding excellent corrosion resistance and mechanical properties. Fabrication of zircaloy-2 sheets through tungsten inert gas welding, guided by optimal process parameters derived from extensive trial-and-error testing, has yielded welds with impeccable quality suitable for deployment in nuclear, aerospace, and marine sectors. Analysis of welded microstructure of material revealed the presence of columnar and equiaxed dendrites near the weld metal, primarily composed of α-zirconium and β-zirconium phases, as evidenced by optical microscopy and x-ray diffraction. These microstructural variations, induced by constitutional supercooling and thermal histories, have significantly enhanced the mechanical properties of welded pipe. There is an increase of 4.3 % in strength as tensile strength of 477 MPa, while base metal exhibited strength of 457 MPa. Notably, the welded sheet exhibited superior mechanical strength compared to the base metal, with ductility demonstrated through a 180° bend test showing no signs of cracking proving its ductility. Microhardness assessments highlighted a decline in hardness within the base metal region (178 HV 0.5 to 186 HV 0.5), contrasting with peak values observed in the weld metal (215 HV 0.5 to 223 HV 0.5). This comprehensive investigation sheds light on the successful fabrication of zircaloy-2 via tungsten inert gas welding, emphasizing its potential for diverse industrial application.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"193-200"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of rare earth cerium on the microstructure and properties of Cu-12Sn-4Ni alloy\u0000 Auswirkungen des Seltene-Erdelementes Cer auf das Gefüge und die Eigenschaften von CuSn12Ni4-Legierungen","authors":"Z. Jia,&nbsp;Z. Zhang,&nbsp;Y. Lu,&nbsp;J. Ji,&nbsp;J. Xiao,&nbsp;Y. Zhao","doi":"10.1002/mawe.202300413","DOIUrl":"https://doi.org/10.1002/mawe.202300413","url":null,"abstract":"<p>The microstructure and properties of the Cu-12Sn-4Ni alloy were analyzed by incorporating varying amounts of the rare earth element cerium. The study compared the alloy‘s microstructure, hardness, strength, friction, and wear. The results showed that adding 0.04 % of rare earth cerium refined the grain size of the Cu-12Sn-4Ni alloy from 75 μm to 200 μm to 75 μm to125 μm. The hardness of the alloy increased by 22.78 % to 135.897 HV 0.1 after adding cerium, and the tensile strength of the alloy reached its highest peak at 452.08 MPa, with an elongation of up to 64.735 % after fracture. Additionally, the wear rate of the material decreased by about 38.6 % to 1.61×10⁻⁵ mm³/mm. In conclusion, the addition of the rare-earth element cerium successfully improved the structure and properties of the Cu-12Sn-4Ni alloy, leading to enhanced hardness, strength, and wear resistance.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 2","pages":"181-192"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}