IOP Conference Series: Materials Science and Engineering最新文献_第3页

Integration of spray-formed AISI H13 overspray powder in additive manufacturing to enable a circular ecosystem 将喷射成形的 AISI H13 过喷粉末集成到增材制造中，实现循环生态系统

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012041

M R L Zwicker, N S Tiedje, T Dahmen, V K Nadimpalli

引用次数: 0

Dislocation structure evolution during metal additive manufacturing 金属增材制造过程中的位错结构演变

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012012

M V Upadhyay, S Gaudez, W Pantleon

{"title":"Dislocation structure evolution during metal additive manufacturing","authors":"M V Upadhyay, S Gaudez, W Pantleon","doi":"10.1088/1757-899x/1310/1/012012","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012012","url":null,"abstract":"Dislocation structures are abundantly present in any additively manufactured alloy and they play a primary role in determining the mechanical response of an alloy. Until recently, it was understood that these structures form due to rapid solidification during AM. However, there was no consensus on whether they evolve due to the subsequent solid-state thermal cycling that occurs with further addition of layers. In order to design alloy microstructures with desired mechanical responses, it is crucial to first answer this outstanding question. This question was answered in a recent work [1] involving a novel experiment employing high resolution reciprocal space mapping, a synchrotron based X-ray diffraction technique, <italic toggle=\"yes\">in situ</italic> during AM of an austenitic stainless steel. The study revealed that dislocation structures formed during rapid solidification undergo significant evolution during subsequent solid-state thermal cycling, in particular during addition of the first few (up to 5) layers above the layer of interest. A summary of the findings of this study are presented in this work. A possible pathway (involving experiment and modelling synergy) to better understanding dislocation structure formation during AM is presented.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187459","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

Micro-macro relationship between microstructure and mechanical behavior of 316L stainless steel fabricated using L-PBF additive manufacturing 使用 L-PBF 快速成型技术制造的 316L 不锈钢的微观结构与力学性能之间的微观-宏观关系

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012017

C Ozdogan, R A Yildiz, L Tavares, M Malekan

{"title":"Micro-macro relationship between microstructure and mechanical behavior of 316L stainless steel fabricated using L-PBF additive manufacturing","authors":"C Ozdogan, R A Yildiz, L Tavares, M Malekan","doi":"10.1088/1757-899x/1310/1/012017","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012017","url":null,"abstract":"Compared to traditional production techniques, additive manufacturing (AM) of metallic components has several benefits, mainly little material waste and more design freedom. AM process based on laser powder bed fusion has many key process parameters including scanning speed, layer thickness, build direction, and printing power. Each one of these parameters influences microstructure, and hence macro-mechanical behavior of the manufactured part, as the part microstructure plays a critical role in determining the mechanical properties. This work aims to address a relationship between micro-structure and macro-mechanical behavior of AM fabricated parts made of 316L Stainless Steel. Both as-built and heat-treated samples are being used for experimental testing and microstructure characterizations. Arcan fixture is used to evaluate the macro-mechanical fracture behavior of the material under mode-I, mode-II, and mixed-mode conditions. Microstructure evaluations of the fracture surfaces are done using scanning electron microscopy and X-Ray diffraction techniques. Finally, a correlation between micro-scale characteristics and macro-mechanical behavior is obtained together with different AM process parameters.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187457","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 solution treatment temperature on recrystallisation behaviour of Haynes 282 manufactured through laser powder bed fusion 溶液处理温度对通过激光粉末床熔融技术制造的 Haynes 282 再结晶行为的影响

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012038

K Swaminathan, J Andersson

{"title":"Effect of solution treatment temperature on recrystallisation behaviour of Haynes 282 manufactured through laser powder bed fusion","authors":"K Swaminathan, J Andersson","doi":"10.1088/1757-899x/1310/1/012038","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012038","url":null,"abstract":"Increasing layer thickness in Laser Powder Bed Fusion (PBF-LB) process of metals enable increasing productivity and facilitate industrialisation of metal additive manufacturing (AM) process. Understanding of microstructure in as-built stage and possible post-processing steps to modify the microstructure is critical for metal AM components. Haynes 282 Nickel based superalloy, typically used in aerospace and energy industries, was manufactured using PBF-LB process at 60 microns layer thickness. Two different solution treatment temperatures were studied to analyse the recrystallization behaviour of the as-built material. The as built microstructure consisted high dislocation density given the rapid cooling in PBF-LB process. Solution treatment at 1150°C resulted in reduced dislocation density but similar morphology to grains in as built condition with visible residual melt pool boundaries. Solution treatment at 1250°C resulted in recrystallised grain structure. The recrystallisation behaviour is discussed with relation to manufacturing process and kinetic behaviour of alloying elements.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187405","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

Microstructure Evolution and Precipitation Strengthening Behaviour of Additively Manufactured High-speed Steels 快速成型高速钢的微观结构演变和沉淀强化行为

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012022

H Zhang, D A Venero, J Park, S V Petegem, A Özsoy, G Soundarapandiyan, S Robertson, X Zhang, B Chen

{"title":"Microstructure Evolution and Precipitation Strengthening Behaviour of Additively Manufactured High-speed Steels","authors":"H Zhang, D A Venero, J Park, S V Petegem, A Özsoy, G Soundarapandiyan, S Robertson, X Zhang, B Chen","doi":"10.1088/1757-899x/1310/1/012022","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012022","url":null,"abstract":"Additively manufactured (AM) high-speed steels were investigated, focusing specifically on the microstructure evolution during post-treatment in S390 steel and the rapid solidification process in M50 steel. An improved understanding of the processing-microstructure-property relationship for AM high-speed steel is achieved through a combination of post-mortem microstructure characterisation on precipitates and in-situ tracking of phase evolution. Quantitative characterisation of primary carbides and nanoprecipitates highlights the strengthening through nanoprecipitates that contribute to the exceedingly high hardness of 921 HV. Phase evolution during tempering was examined through in-situ synchrotron diffraction and ex-situ small-angle neutron scattering, revealing primary carbide growth by 60 nm within 2 minutes and nanoparticle precipitation with a size of 1.4 nm after 60-minute tempering. Additionally, the microstructure evolution of AM M50 steel was investigated by operando synchrotron diffraction, unveiling cooling rates in the order of 10<sup>5</sup> K/s during liquid-solid transformation. After printing, the carbon content of 0.47 wt.% in the matrix was derived from the martensite tetragonality. The insights gained serve as a valuable guide for designing future steel groups and developing heat treatment procedures tailored for the AM process.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187413","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

Assessing and controlling microstructure heterogeneity in fusion-based additive manufacturing 评估和控制基于熔融技术的增材制造中的微结构异质性

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012010

M Seita

{"title":"Assessing and controlling microstructure heterogeneity in fusion-based additive manufacturing","authors":"M Seita","doi":"10.1088/1757-899x/1310/1/012010","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012010","url":null,"abstract":"One of the de*ining features of fusion-based additive manufacturing (AM) is the localized melting of metal by a high-energy source, which fuses the material together point by point and layer by layer into a 3D object. The rapid solidi*ication velocity, directional thermal gradients, and site-speci*ic thermal build-ups produced by this process yield parts with complex and heterogeneous microstructure. This heterogeneity is a double-edged sword. On the one hand, it leads to large property scatter and casts uncertainty over parts performance, hindering the adoption of additive technologies by the industry. On the other hand, it may impart exceptional mechanical properties and new functionalities, which are not found in conventionally produced materials. In this paper, we present two ongoing research endeavours aimed at mitigating the detrimental effects of microstructure heterogeneity in AM, and at capitalizing on the opportunities it offers in the design of novel metal alloys, respectively. The *irst consists of developing a high-throughput characterization technique to enable large-scale microstructure analysis of AM builds. The second consists of a new strategy to control the material’s microstructure site-speci*ically during laser powder bed fusion.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187460","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

Neutron diffraction analysis of microstructural evolution and mechanical behavior in an additively manufactured multiphase alloy 中子衍射分析加成制造多相合金的微观结构演变和力学行为

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012035

K Yamanaka, M Mori, Y Onuki, S Sato

引用次数: 0

Challenges in characterizing additively manufactured AlSi10Mg using X-ray Laue micro-beam diffraction 利用 X 射线 Laue 微束衍射表征铝硅镁叠加制造技术的挑战

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012023

Y Zhang, M Defer, W Liu, E F F Knipschildt-Okkels, J Oddershede, A Slyamov, F Bachmann, E Lauridsen, D Juul Jensen

引用次数: 0

Lagrangian properties of the blood flow through human and murine aortic arches: towards improved customised therapies and diagnostic techniques 人体和小鼠主动脉弓血流的拉格朗日特性：改进定制疗法和诊断技术

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1312/1/012011

Simone Ghiglia, Marco Mazzuoli, Joel Guerrero

{"title":"Lagrangian properties of the blood flow through human and murine aortic arches: towards improved customised therapies and diagnostic techniques","authors":"Simone Ghiglia, Marco Mazzuoli, Joel Guerrero","doi":"10.1088/1757-899x/1312/1/012011","DOIUrl":"https://doi.org/10.1088/1757-899x/1312/1/012011","url":null,"abstract":"The mass transport properties of the blood flow in the aortic arch are investigated by means of direct numerical simulations. The aortic arches in human and murine cases are assumed to be similar (with similarity factor equal to 20) and characterised by constant diameter, while the axis lays on a plane. The simulations were carried out using OpenFOAM (v.10). The flow regime appears remarkably different in the two cases because flow separation and vortical structures appear during the systolic phases in the human case, which are absent at the mouse scale. Consequently, peaks of the wall-shear-stress occur at different phases and, in the murine case, are characterised by a magnitude nearly 4 times larger than in the human case. The trajectories of fluid particles are computed in order to evaluate the dispersion efficiency exploited by biomedical applications (e.g. drug delivery or solid micro carriers). Despite the different flow regimes, in both system particles uniformly released at the inlet preserve a homogeneous distribution as they flow in the aortic arch. In particular, during the early decelerating phases of systole, the fluid trajectories are found frequently to approach the zones of the wall where the shear-stress is large.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187313","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

The effect of processing parameters on dislocation density and tensile properties in laser powder bed fusion 316L 加工参数对激光粉末床熔融 316L 中位错密度和拉伸性能的影响

IOP Conference Series: Materials Science and Engineering Pub Date : 2024-08-01 DOI: 10.1088/1757-899x/1310/1/012024

M Schreiber, C Brice, K Findley, J Klemm-Toole, J Gockel

{"title":"The effect of processing parameters on dislocation density and tensile properties in laser powder bed fusion 316L","authors":"M Schreiber, C Brice, K Findley, J Klemm-Toole, J Gockel","doi":"10.1088/1757-899x/1310/1/012024","DOIUrl":"https://doi.org/10.1088/1757-899x/1310/1/012024","url":null,"abstract":"The processing-structure-properties relationships in laser beam powder bed fusion (PBF-LB) additive manufacturing (AM) are complex with multiple aspects of the processing impacting the microstructure and mechanical properties. Though, the influences of process parameters on strengthening mechanisms are less clear. In this work, laser power, scanning velocity, and hatch spacing were varied to promote PBF-LB 316L microstructures with distinctive thermal histories to vary microstructures and tensile properties. Tensile data were collected for over 100 different processing parameters on a single PBF-LB platform. Across the process parameter matrix yield strength, work hardening behavior, and ductility varied considerably. In this work, the effect of process parameters on initial dislocation density was studied. By quantifying the dislocation density with X-ray diffraction and line profile analysis, a relationship between processing parameters and initial dislocation densities was established. The contribution of dislocation density and other strengthening mechanisms to the yield strength is discussed.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187401","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