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Numerical analysis of droplet breakup, cooling, and solidification during gas atomisation 气体雾化过程中液滴破碎、冷却和凝固的数值分析
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-05-20 DOI: 10.1080/00325899.2023.2213002
Gezhou Wang, Y. Deng, F. Adjei-Kyeremeh, Jiali Zhang, I. Raffeis, A. Bührig-Polaczek, A. Kaletsch, C. Broeckmann
{"title":"Numerical analysis of droplet breakup, cooling, and solidification during gas atomisation","authors":"Gezhou Wang, Y. Deng, F. Adjei-Kyeremeh, Jiali Zhang, I. Raffeis, A. Bührig-Polaczek, A. Kaletsch, C. Broeckmann","doi":"10.1080/00325899.2023.2213002","DOIUrl":"https://doi.org/10.1080/00325899.2023.2213002","url":null,"abstract":"ABSTRACT As gas atomisation has been the main method for producing high-performance spherical powders in the past decades, its application in the production of metallic powders has become one of the main research subjects in this field. Since it is challenging to directly observe the atomising gas and to investigate melt flow states by experiments, numerical simulation is attracting increasing interest in studying the gas atomisation process. In this work, various computational fluid dynamics models were implemented to simulate the gas atomisation process. With the models, the droplet breakup, cooling, and solidification within the coupled process were investigated. The final mean particle size was predicted through numerical simulations and compared with the statistics extracted from the gas atomisation process, which shows that a reasonable mass median diameter of the particle can be predicted numerically. The results also show a clear relationship between the breakup trajectory and the resulting particle size.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48663965","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}
引用次数: 0
Effect of feedstock bimodal powder mixture and infiltration process on mechanical behaviour of binder jetting processed 316L stainless steel 进料双峰混合粉料及渗透工艺对粘结剂喷射加工316L不锈钢力学性能的影响
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-05-17 DOI: 10.1080/00325899.2023.2213005
Xuhao Liang, X. Meng, Peishen Ni, Zhe Zhao, X. Deng, Guanqiao Chen, Yongxuan Chen, Shidi Li, Shanghua Wu, Jinyang Liu, Z. Qu, Feng Jin
{"title":"Effect of feedstock bimodal powder mixture and infiltration process on mechanical behaviour of binder jetting processed 316L stainless steel","authors":"Xuhao Liang, X. Meng, Peishen Ni, Zhe Zhao, X. Deng, Guanqiao Chen, Yongxuan Chen, Shidi Li, Shanghua Wu, Jinyang Liu, Z. Qu, Feng Jin","doi":"10.1080/00325899.2023.2213005","DOIUrl":"https://doi.org/10.1080/00325899.2023.2213005","url":null,"abstract":"ABSTRACT Binder jetting additive manufacturing (BJAM) is a widely studied technique fabricating metal parts. In this study, bimodal 316L stainless steel powder mixture of coarse (D50 – 34.1μm) and fine (D50 – 6.28μm) powders were designed for BJAM. Infiltration was used to improve the density of BJAMed parts. Bimodal powder mixture showed clear advantage over unimodal powder system on density and mechanical property of BJAMed parts. Upon solid-phase sintering, BJAMed 316 stainless steel of bimodal powder mixture (9:1 mass ratio of coarse to fine powder) showed relative density 97.19% and tensile strength 343.62 MPa, as compared with relative density 84.55% and tensile strength 291.59 MPa for pure coarse powder. For the same bimodal powder mixture, bronze infiltration, compared with solid-phase sintering, resulted in noticeably higher relative density 99.92% and tensile strength 621.63 MPa. Compared with solid-phase sintering, infiltration significantly reduced the volumetric shrinkage.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43086454","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}
引用次数: 0
Fabrication of tailored Ti6Al4V-based materials by conventional powder metallurgy for bone implant applications 传统粉末冶金技术制备骨种植体专用ti6al4v基材料
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-05-11 DOI: 10.1080/00325899.2023.2211410
L. Olmos, D. Bouvard, O. Jiménez, J. Chávez, R. Macias
{"title":"Fabrication of tailored Ti6Al4V-based materials by conventional powder metallurgy for bone implant applications","authors":"L. Olmos, D. Bouvard, O. Jiménez, J. Chávez, R. Macias","doi":"10.1080/00325899.2023.2211410","DOIUrl":"https://doi.org/10.1080/00325899.2023.2211410","url":null,"abstract":"ABSTRACT This works proposes a methodology for fabricating materials with specific characteristics mimicking human bones. A Ti64 alloy powder was used as the base material and it was mixed with Ag, Ta, TiN and salt particles to obtain different features. A hip-bone like component was fabricated, including a highly porous core of Ti64/25Ta/5Ag and a compact outer shell of Ti64/5Ag that is supposed to improve corrosion and osseointegration. Besides, a harder cover surface in Ti64/10TiN composite should increase the wear resistance. The green component was sintered at 1260°C in argon. Its Young’s modulus was close to the one of bones due to the added porosity, which also provided a permeability close to the one reported for trabecular bones. Tribocorrosion behaviour in simulated body fluid was improved by TiN addition. In conclusion, the proposed processing route was able to produce complex components fulfilling specific features required for human bone replacement.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"216 - 226"},"PeriodicalIF":1.4,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46309117","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}
引用次数: 1
Synergetic effect of milling speed and duration on particle morphology and mechanical properties of nanocrystalline Al matrix containing SiC 铣削速度和时间对含SiC纳米晶Al基颗粒形貌和力学性能的协同效应
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-05-08 DOI: 10.1080/00325899.2023.2207863
K. Nayak, J. Han, C. Jung, M. Joo, K.B. Lee, D. Bae, H.J. Choi
{"title":"Synergetic effect of milling speed and duration on particle morphology and mechanical properties of nanocrystalline Al matrix containing SiC","authors":"K. Nayak, J. Han, C. Jung, M. Joo, K.B. Lee, D. Bae, H.J. Choi","doi":"10.1080/00325899.2023.2207863","DOIUrl":"https://doi.org/10.1080/00325899.2023.2207863","url":null,"abstract":"ABSTRACT In the present study, the composite sheets were produced by powder rolling the ball-milled Al/SiC mixture. The effect of milling speed (350–550 rev min–1) and milling duration (8 and 12 h) on the Al particle morphology and subsequent mechanical properties were examined for composites with different volume fractions of SiC. From the microstructural investigation, SiC particles are evenly distributed and well dispersed in the Al matrix; those are prepared under higher milling speed (550 rev min–1) and higher milling time (12 h). Furthermore, the flattened-shaped particle morphology was obtained under lower milling conditions, whereas the reduced-granule shape was obtained under higher milling conditions (550 rev min–1, 12 h). Consequently, the Al/SiC composite sheets made from a granule-shaped Al/SiC mixture show higher density, microhardness, and tensile strength due to significant consolidation and SiC uniformity. In addition, the tensile strength of 430.26 MPa has been achieved for the Al/2vol.-%SiC sheet compared to pure Al (393.49 MPa) under similar processing conditions.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47875487","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}
引用次数: 0
Effects of processing conditions and fine powder loading on real and electroactive surface areas of porous nickel manufactured by lost carbonate sintering 工艺条件和细粉掺量对损失碳酸盐烧结多孔镍实际表面积和电活性表面积的影响
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-24 DOI: 10.1080/00325899.2023.2202953
Zejun Wang, Yuyuan Zhao
{"title":"Effects of processing conditions and fine powder loading on real and electroactive surface areas of porous nickel manufactured by lost carbonate sintering","authors":"Zejun Wang, Yuyuan Zhao","doi":"10.1080/00325899.2023.2202953","DOIUrl":"https://doi.org/10.1080/00325899.2023.2202953","url":null,"abstract":"ABSTRACT The effects of five key processing parameters on the real and electroactive surface areas of porous nickel samples produced by the Lost Carbonate Sintering (LCS) process have been investigated systematically. The specific real and electroactive surface areas of the LCS porous Ni samples are 500–1600 cm−1 and 80–115 cm−1. Pore size, compacting pressure and sintering temperature have no significant effect on the surface areas. Porosity has no effect on the gravimetric real surface area, but a higher porosity leads to a lower volumetric real surface area and a higher electroactive surface area. Metal particle size has a huge effect on the surface areas of the LCS porous metal. An intermediate amount of fine Ni powder results in the highest real surface area, approximately 70% higher than the samples produced with coarse Ni powder. Samples produced with fine Ni powder can increase the electroactive surface area by up to 100%.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41923885","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}
引用次数: 0
Preparation of 24CrNiMoY alloy steel with high strength and toughness by selective laser melting 选择性激光熔炼制备高强度高韧性24CrNiMoY合金钢
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-24 DOI: 10.1080/00325899.2023.2202947
M. Sun, Suiyuan Chen, M. Wei, Jing Liang, Changsheng Liu, Mei Wang
{"title":"Preparation of 24CrNiMoY alloy steel with high strength and toughness by selective laser melting","authors":"M. Sun, Suiyuan Chen, M. Wei, Jing Liang, Changsheng Liu, Mei Wang","doi":"10.1080/00325899.2023.2202947","DOIUrl":"https://doi.org/10.1080/00325899.2023.2202947","url":null,"abstract":"ABSTRACT 24CrNiMoY alloy steel with high strength and toughness was prepared by selective laser melting (SLM) technology. The microstructure and mechanical properties of alloy steel samples prepared by SLM using different laser energies were studied. The results showed that with increasing energy density, the internal defects of the sample first decreased and then increased, and the hardness and tensile properties also showed a trend of increasing at first but decreasing afterwards. When the energy density was 100.7 J/mm3, the alloy steel sample has the fewest defects and the highest hardness (391.2 HV0.2). The tensile strength and impact toughness also reached the best state: the tensile strength was 1252.83 MPa, the yield strength was 1041.62 MPa, the elongation to fracture was 12.89%, and the impact toughness was 65.7 J. The microstructure of 24CrNiMoY alloy steel prepared by SLM is mainly composed of fine lath martensite, which has good strength and toughness.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48105383","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}
引用次数: 0
Study of microstructure and mechanical properties of 17-4 PH stainless steel produced via Binder Jetting 粘结剂喷射法制备17-4 PH不锈钢的显微组织和力学性能研究
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-20 DOI: 10.1080/00325899.2023.2202950
L. Emanuelli, Giacomo Segata, M. Perina, Martin Regolini, Valentina Nicchiotti, A. Molinari
{"title":"Study of microstructure and mechanical properties of 17-4 PH stainless steel produced via Binder Jetting","authors":"L. Emanuelli, Giacomo Segata, M. Perina, Martin Regolini, Valentina Nicchiotti, A. Molinari","doi":"10.1080/00325899.2023.2202950","DOIUrl":"https://doi.org/10.1080/00325899.2023.2202950","url":null,"abstract":"ABSTRACT The microstructure and mechanical properties of 17-4 stainless steel produced by Binder Jetting (BJT) and heat treated according to the standard conditions for the 17-4 PH steel (H900 and H1100) were investigated. The sintered relative density is 97.8% with a slightly anisotropic shrinkage. Tensile strength and elongation are above the minimum required for the wrought steel and comparable to those of the same material manufactured by Metal Injection Molding. They are also better than those reported in the literature for the 17-4 PH stainless steel manufactured by BJT. Tensile elongation at fracture is anisotropic, highlighting a significant dependence of the non-uniform plastic deformation on the direction.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41706863","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}
引用次数: 0
Microstructural evolution during sintering of Fe-Cr-C steels prepared from admixed elemental powders 混合元素粉末制备Fe-Cr-C钢烧结过程中的组织演变
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-19 DOI: 10.1080/00325899.2023.2201487
R. de Oro Calderon, C. Gierl-Mayer, H. Danninger
{"title":"Microstructural evolution during sintering of Fe-Cr-C steels prepared from admixed elemental powders","authors":"R. de Oro Calderon, C. Gierl-Mayer, H. Danninger","doi":"10.1080/00325899.2023.2201487","DOIUrl":"https://doi.org/10.1080/00325899.2023.2201487","url":null,"abstract":"ABSTRACT In the upcoming years, a reduction in the use of critical elements, such as Ni and Cu, with unstable prices and high demand from the electromobility sector will become increasingly important for the PM-industry. Cr-alloyed sintered steels offer attractive properties at a moderate cost, but so far mostly Cr-prealloyed grades have been used. This work analyses the microstructural homogenisation process when Cr is introduced as admixed elemental powder. It is shown how – due to its high carbon affinity – Cr particles act as ‘internal carbon-getters’. There is an intermediate ‘heterogenization’ of the microstructure, i.e. the iron matrix is decarburised due to the formation of (Cr, Fe)-carbides. Final homogenisation depends on the formation of a transient liquid phase through the eutectic reaction between carbides and the iron matrix. Thus, the microstructure is not only sensitive to aspects such as sintering temperature or Cr-particle size but also to the heating rate and small variations in nominal carbon.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47238466","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}
引用次数: 0
Francisco ‘Paco’ Castro – obituary
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-17 DOI: 10.1080/00325899.2023.2200713
I. Iturriza
{"title":"Francisco ‘Paco’ Castro – obituary","authors":"I. Iturriza","doi":"10.1080/00325899.2023.2200713","DOIUrl":"https://doi.org/10.1080/00325899.2023.2200713","url":null,"abstract":"","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"279 - 280"},"PeriodicalIF":1.4,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43436135","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}
引用次数: 0
Using discrete simulations of compaction and sintering to predict final part geometry 使用压实和烧结的离散模拟来预测最终零件的几何形状
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-04-12 DOI: 10.1080/00325899.2023.2198796
Gilmar Nogueira, T. Gervais, V. Peres, Estelle Marc, C. L. Martin
{"title":"Using discrete simulations of compaction and sintering to predict final part geometry","authors":"Gilmar Nogueira, T. Gervais, V. Peres, Estelle Marc, C. L. Martin","doi":"10.1080/00325899.2023.2198796","DOIUrl":"https://doi.org/10.1080/00325899.2023.2198796","url":null,"abstract":"ABSTRACT\u0000 A Discrete Element Method (DEM) model is used to simulate the compaction and sintering of ceramic oxides. The process kinematics is decomposed into loading, unloading and ejection of the pellet. Interactions between the particles are considered elastoplastic by implementing a model able to tackle large densities. A simplified approach is used in the sintering stage, which focuses on the final part geometry rather than kinetics. The results are in good agreement with experimental data and FEM simulations from the literature regarding density gradient, elastic spring-back and final geometry. The simulations show that the friction coefficient between the agglomerates and the die is the primary factor for the density gradient in the pellet. This density gradient induces non-homogeneous sintering, which results in a final geometry with a diabolo effect. It is the first time that DEM reproduces this effect with the advantage of considering explicitly the particulate nature of the powder. GRAPHICAL ABSTRACT","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"208 - 215"},"PeriodicalIF":1.4,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44522493","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}
引用次数: 0
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