Materialwissenschaft und Werkstofftechnik最新文献

{"title":"Coercivity improvement for vanadium carbide (VC) doped sintered Nd−Fe−B magnets: Effectively tuning microstructure\u0000 Verbesserung der Koerzitivkraft von mit Vanadiumkarbid (VC) dotierten gesinterten Nd−Fe−B−Magneten: Effektive Abstimmung des Gefüges","authors":"Z. Wei,&nbsp;L. Lele,&nbsp;Z. Xusheng,&nbsp;Y. Yang,&nbsp;X. Jun,&nbsp;M. Yanjiao,&nbsp;Z. Hong,&nbsp;L. Jitao","doi":"10.1002/mawe.202400244","DOIUrl":"https://doi.org/10.1002/mawe.202400244","url":null,"abstract":"<p>Vanadium carbide (VC) nano-particles were introduced into sintered Nd−Fe−B magnets for the purpose of grain refinement and coercivity enhancement. The effect of vanadium carbide (VC) addition on the microstructure and magnetic properties evolution of sintered Nd−Fe−B magnets was studied. Based on the characterization results, the additive vanadium carbide (VC) nano-particles mainly reacted with rare earth (RE)-rich phase to form ferrovanadium (FeV) phase, which rooted in the grain boundary. The ferrovanadium (FeV) phase inserted influence on the dissolution-precipitation process and acted as pinning sites and heterogeneous nucleation sites, which was favorable for the grain refinement. As a result, the coercivity of sintered magnets enhanced significantly from 13.62 kOe to 16.15 kOe without obvious decline of remanence when the vanadium carbide (VC) nano-particles additive amount increased from 0 wt.–% to 0.1 wt.–%. The above findings shed light on the microstructure manipulation to obtain high performance sintered magnets.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"476-483"},"PeriodicalIF":1.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698838","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":"Formation mechanism of cerium-based inclusions and effect on microstructure and impact toughness in Q355ME\u0000 Bildungsmechanismus von Einschlüssen auf Cer-Basis und Auswirkung auf Gefüge und Kerbschlagzähigkeit in Q355ML","authors":"X. Zhang,&nbsp;J. Zhi,&nbsp;X. Song,&nbsp;S. An","doi":"10.1002/mawe.202300335","DOIUrl":"https://doi.org/10.1002/mawe.202300335","url":null,"abstract":"<p>The study explored the formation mechanisms of cerium-based inclusions and effects on the microstructure and impact toughness of industrial Q355ME steel through cerium addition. Formation of the inclusions was governed by both thermodynamic and kinetic factors. The results revealed that inclusions in cerium-free steel primarily consisted of magnesium aluminum spinel (with lesser manganese sulpfide), calcium aluminates (CaAl₄O₇, CaAl₁₂O₁₉), and calcium sulpfide with lesser aluminum oxide. Conversely, in cerium-containing steel, the inclusions predominantly included manganese sulpfide (with lesser magnesium aluminum spinel and a combination of cerium (III) sulpfide and cerium oxysulpfide), cerium (III) sulpfide-cerium oxysulpfide-calcium sulpfide (with lesser magnesium aluminum spinel) and calcium sulpfide. The introduction of cerium led to the disappearance of calcium aluminum oxide inclusions, producing smaller, more numerous, and spherical or ellipsoidal complex cerium-based inclusions. Furthermore, cerium addition resulted in a reduction in both the quantity and size of manganese sulpfide inclusions. Cerium-bearing complex inclusions contributed to grain refinement. Both transverse and longitudinal toughness values for cerium-containing steel were similar at identical temperatures, with longitudinal toughness surpassing transverse toughness in samples without cerium. Under identical conditions, especially at −80 °C, the impact toughness values of steel with cerium were significantly higher than those without cerium.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"353-363"},"PeriodicalIF":1.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698816","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":"Machining performance of thermally modified wood in milling processes\u0000 Zerspanungsleistung von thermisch modifiziertem Holz bei Fräsprozessen","authors":"Q. Jin,&nbsp;Y. Jin,&nbsp;H. Dong,&nbsp;Z. Wu,&nbsp;F. Zhang,&nbsp;J. Wang,&nbsp;Z. Hao,&nbsp;P. Yang,&nbsp;X. Guo","doi":"10.1002/mawe.202300339","DOIUrl":"https://doi.org/10.1002/mawe.202300339","url":null,"abstract":"<p>In order to study the machining properties of thermally modified wood during milling processes, milling experiments on thermally modified wood were carried out to analyse the effects of thermal modification temperature, cutting depth, feed speed and spindle speed on cutting force, cutting temperature and surface roughness. The experimental findings demonstrated that while cutting depth and feed speed were increased, cutting force, cutting temperature, and surface roughness rose, while these variables dropped as spindle speed was raised. Lower cutting depth, feed speed and higher spindle speed could be selected for better surface quality. As the thermal modification temperature rose, surface roughness increased and cutting force and cutting temperature decreased. The experimental results also showed that although the cutting force on thermally modified wood was reduced compared to untreated wood, the strength of the thermally modified wood was reduced, the cutting force was still more than the capacity of the wood cell walls, which led to a reduction in surface quality, and as the temperature was increased, the quality of the milled surface would deteriorate. This study provides a detailed analysis of the milling performance of thermally modified wood, which holds significant relevance for practical processing of thermally modified wood.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 3","pages":"339-352"},"PeriodicalIF":1.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698815","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":"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}