IOP Conference Series: Materials Science and Engineering最新文献_第5页

1D and 2D porous media fixed bed reactor simulations with DUO: Steam Methane Reforming (SMR) validation test 利用 DUO 进行一维和二维多孔介质固定床反应器模拟：蒸汽甲烷转化 (SMR) 验证试验

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1312/1/012004

E. Daymo, A. Tonkovich, M. Hettel, A. Shirsath

引用次数: 0

In-Situ EBSD Study of Austenitisation in a Wire-Arc Additively Manufactured High-Strength Steel 线弧加成型高强度钢奥氏体化的原位 EBSD 研究

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012001

M Taylor, Y H Mozumder, A D Smith, A E Davis, F Scenini, P B Prangnell, E J Pickering

{"title":"In-Situ EBSD Study of Austenitisation in a Wire-Arc Additively Manufactured High-Strength Steel","authors":"M Taylor, Y H Mozumder, A D Smith, A E Davis, F Scenini, P B Prangnell, E J Pickering","doi":"10.1088/1757-899x/1310/1/012001","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012001","url":null,"abstract":"As-built high-strength steel wire-arc additive manufactured (WAAM) components often contain coarse columnar prior austenite grain (PAG) structures. These microstructures can result in poor mechanical properties, hence post-build re-austenitisation treatments are of interest to improve microstructures. Here, the potential for engineering austenite refinement was investigated using high-temperature in-situ EBSD with high temporal resolution. It was found that 300M first austenitised with a memory effect, reforming the columnar PAG structures in both morphology and crystallographic orientation. This was observed to occur by the coalescence of acicular austenite and happened earlier in the depleted dendritic regions. On further heating, austenite underwent recrystallisation without the application of external deformation via a discontinuous mechanism, involving the bulging of the prior high angle boundaries. Recrystallisation twins were also seen to form and grow alongside regular recrystallised grains. The predominance of discontinuous recrystallisation meant that a coarse grain structure was still retained after austenitisation, owing to the influence of a grain ‘swapping’ effect.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recrystallization kinetics in 3D printed 316L stainless steel 3D 打印 316L 不锈钢中的再结晶动力学

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012042

C Zhang, S Ahmed, V K Nadimpalli, T Yu, D Juul Jensen

引用次数: 0

OpenFOAM simulations for development of a mist flow diverter in aerosol jet printing OpenFOAM 模拟开发气溶胶喷射印刷中的雾流分流器

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1312/1/012005

James Q Feng

{"title":"OpenFOAM simulations for development of a mist flow diverter in aerosol jet printing","authors":"James Q Feng","doi":"10.1088/1757-899x/1312/1/012005","DOIUrl":"https://doi.org/10.1088/1757-899x/1312/1/012005","url":null,"abstract":"To design functional devices meeting the performance requirements for Aerosol Jet® (AJ) printing to deposit ink on substrate by a collimated impinging mist jet, understanding the internal mist flow behaviour is important. Herewith a computational fluid dynamics (CFD) model is presented with an OpenFOAM software package, for development of a mist flow diverter in the AJ printing equipment. The function of such a mist flow diverter is to direct a mist flow with specified flow rate to the deposition nozzle for printing the ink material onto substrate and to divert the mist flow away when the nozzle moves over a substrate location where ink deposition is unwanted. The CFD results can reveal detailed mist flow behaviour during mist flow switching for quantitative analysis of mist front travelling time through different regions. It is shown that such an internal pneumatic diverter inevitably brings noticeable on-delay and off-delay, more so for finer feature printing with lower mist flow rate due to time needed for mist droplets to travel from the mist flow switching chamber to substrate. Moreover, the on-delay and off-delay also come with gradual fade-in and fade-out effects in printed features especially when the substrate is moving at a considerable speed. Presented here is but one example of CFD analysis applied to performance examination of a commercial vacuum-boost diverter, although the established computational model has also been utilized to guide equipment design with evaluations of the effects of different geometric shapes and sizes by virtue of the convenience for CFD domain geometry and mesh adjustments.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 microstructural heterogeneity and grain morphology on the annealing behavior of additively manufactured metastable β titanium alloy 微观结构异质性和晶粒形态对添加式制造的可转移 β 钛合金退火行为的影响

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012033

J Q Chang, Y N Wu, Z B Zhang

{"title":"Effect of microstructural heterogeneity and grain morphology on the annealing behavior of additively manufactured metastable β titanium alloy","authors":"J Q Chang, Y N Wu, Z B Zhang","doi":"10.1088/1757-899x/1310/1/012033","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012033","url":null,"abstract":"Titanium alloys fabricated by additive manufacturing usually exhibit significant heterogeneity in grain size and morphology. Recrystallization treatment is an effective approach to alter the microstructure and achieve a more homogeneous structure. In this study, recrystallization and grain growth behaviours of a metastable β titanium alloy fabricated by laser powder bed fusion (LPBF) and direct energy deposition (DED) were investigated. The LPBF sample developed a chessboard-like microstructure, with considerable variations in grain size and morphology across molten pools. Recrystallization started from the boundary of these pools, where grains were finer and the stored energy was higher. The DED sample had a heterogeneous structure with alternating layers of equiaxed grains and columnar grains oriented with <100> along the building direction. Results obtained from in-situ EBSD demonstrated that grain growth occurred preferentially in regions with fine equiaxed grains, and regions with columnar grains showed limited grain growth due to the relatively lower driving force and mobility.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerospike: Mission Simulation and Optimal Design Using Openfoam and Dakota Aerospike：使用 Openfoam 和 Dakota 进行飞行任务模拟和优化设计

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1312/1/012002

Roberto Carbone, Joel Enrique Guerrero Rivas, Eric Segalerba, Jan Oscar Pralits

引用次数: 0

Influence of printing parameters on part density in L-BPF of Ti-6Al-4V and correlation with static mechanical properties measured using indentation testing 印刷参数对 Ti-6Al-4V L-BPF 零件密度的影响以及与压痕测试测得的静态机械性能的相关性

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012030

J Schulz, E C Santos, A Kalliath, B Schmaling, P Zok, S Siegert, I S Dandu, KH Lindner, E Bruder, K Durst

引用次数: 0

Multiscale characterization of the additive-manufacturing-induced cell structure in 316L stainless steel: A comparative study 316L 不锈钢中添加剂制造诱导的细胞结构的多尺度表征：比较研究

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012034

X Wang, V K Nadimpalli, D Juul Jensen, T Yu

引用次数: 0

An Image-Driven Machine Learning Method for Microstructure Characterization in Metal Additive Manufacturing: Generative Adversarial Network 用于金属增材制造微结构表征的图像驱动机器学习方法：生成式对抗网络

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012015

Z Cao, Y Liu, J J Kruzic, X Li

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Peer Review Statement 同行评审声明

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/011002

引用次数: 0