Materials Research Proceedings最新文献

Spindle speed effect on the ISF processing of materials with different thermal conductivities 主轴转速对不同导热系数材料 ISF 加工的影响

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-178

Zhenyuan Qin

引用次数: 0

Remanufacturing process chain for end-of-life aluminium car body parts: Technical and economic analysis 报废铝制车身部件的再制造工艺链：技术和经济分析

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-312

D. Farioli

引用次数: 0

Measurement and analysis of the strength differential effect of 6000-series aluminum alloy sheet 6000 系列铝合金板强度差效应的测量和分析

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-123

Kaisei Akiyama

引用次数: 0

Inverse estimation of material model parameters using Bayesian data assimilation 利用贝叶斯数据同化反向估算材料模型参数

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-132

A. Yamanaka

引用次数: 0

Thermal multi-sensor instrumentation for the enhancement of a directed energy deposition process 用于增强定向能沉积过程的热多传感器仪器

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-8

Lilou de Peindray d'Ambelle

{"title":"Thermal multi-sensor instrumentation for the enhancement of a directed energy deposition process","authors":"Lilou de Peindray d'Ambelle","doi":"10.21741/9781644903131-8","DOIUrl":"https://doi.org/10.21741/9781644903131-8","url":null,"abstract":"Abstract. Directed energy deposition (DED) is an additive manufacturing process with growing industrial interests. Nonetheless, its industrialization will not be possible until it is fully mature. Such maturity lies in the upstream research to optimize and control it. In DED, process parameters, physical quantities and parts properties are interrelated which makes it a complex process. To have a better understanding of these relations, the experimental approach of instrumentation has been chosen. Multi-sensor method has been implemented for its more extensive possibilities in comparison to single-sensor methods. A bichromatic pyrometer was coupled to an IR camera to measure the temperature distributions in real time. Post-process characterizations of the aspects and geometries of the parts were related to the sensors’ measurements and consequently, to the process parameters. Twelves sets of parameters were tested to conclude that the energy input impacts the size of the melting pool and the temperature distribution. High energies lead to defects such as edge defects and layer thickening but can mitigate surface roughness. Both the pyrometer and camera proved to have a relevance in this study for the enhancement of the DED process.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"58 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973359","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

Machinability of PLA obtained by injection molding under a dry milling process 干磨工艺下注塑成型聚乳酸的可加工性

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-208

Liam Cloëz

{"title":"Machinability of PLA obtained by injection molding under a dry milling process","authors":"Liam Cloëz","doi":"10.21741/9781644903131-208","DOIUrl":"https://doi.org/10.21741/9781644903131-208","url":null,"abstract":"Abstract. This paper is part of a study focusing on the elaboration of accurate component with complex geometries using bio-sourced as an alternative to petrochemical polymer. The bio-sourced and biodegradable in this study is composed of a Poly Lactic Acid (PLA) matrix and hemp fibers. The final component is obtained by injection followed by a machining operation. the final component is obtained by injection followed by a machining finishing operation. Injection molding will be carried out to be compared with 3D printing on economic, environmental, production and workpiece quality criteria. This paper focuses only on the combination of two processes, injection molding followed by machining on poly (L-lactic acid) or PLLA which is biobased and biodegradable. After injecting the workpiece, thermo-physical characterization tests are realized on PLLA polymer. Rheology, thermal and mechanical tests are carried out in order to study thermomechanical behavior and to understand material flow phenomena at different temperatures and shear rates. The objective of this paper is to overcome the technical challenges of milling this material without any lubricant. In an upcoming project, various machining operations will be carried out such as turning to study continuous cutting, or milling to study discontinuous cutting on workpieces reinforced with bio-sourced fibers as hemp.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"72 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973714","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

Modeling fused deposition of PLA by analysis of the layers 通过层分析建立聚乳酸熔融沉积模型

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-1

C. Bruni

引用次数: 0

Corrective capabilities of different rescanning strategies to restore microstructure and density of initially porous 316L laser powder bed fusion 不同重扫描策略对恢复最初多孔 316L 激光粉末床熔融微观结构和密度的修正能力

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-27

Théo LE SAINT

{"title":"Corrective capabilities of different rescanning strategies to restore microstructure and density of initially porous 316L laser powder bed fusion","authors":"Théo LE SAINT","doi":"10.21741/9781644903131-27","DOIUrl":"https://doi.org/10.21741/9781644903131-27","url":null,"abstract":"Abstract. Mechanical properties of Laser Power Bed Fusion (LPBF) parts, and particularly fatigue properties, are heavily affected by defects including surface roughness or porosity. To mitigate the occurrence of these defects, in-situ and on-line corrective measures can be implemented to the fabrication process, among them, rescanning, which consists in remelting an already solidified layer. Initially porous LPBF samples were created and then rescanned using different scanning parameters and strategies. Results show that it is possible to regain part’s health, compared to a standardly processed one, in terms of density, hardness and even improved roughness. This remelting process is known to refine microstructure of fabricated materials as well as reduce surface roughness and porosity without requiring further post-processing steps. Therefore, employing rescanning as a corrective technique appears to be a promising approach for rectifying detected defects during the fabrication process. The objective of this study is to assess the corrective capabilities of different rescanning strategies to restore the microstructure of an initially porous 316L LPBF simulating a defected part. This study shows that various rescanning strategies allow for densification of initially porous material from 98.83 ± 0.20 % to 99.75 ± 0.09 %, as well as lateral surface roughness reduction from Ra 20.2 ± 5.2 µm to Ra 12.7 ± 0.1 µm and microhardness increase from 243 ± 5 HV0.5 to 253 ± 3 HV0.5.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"59 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974471","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

Analysis of thermal behavior in 3D printing of continuous fiber reinforced polymer composites 连续纤维增强聚合物复合材料 3D 打印中的热行为分析

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-283

Shixian Li

{"title":"Analysis of thermal behavior in 3D printing of continuous fiber reinforced polymer composites","authors":"Shixian Li","doi":"10.21741/9781644903131-283","DOIUrl":"https://doi.org/10.21741/9781644903131-283","url":null,"abstract":"Abstract. Fused filament fabrication (FFF) as an additive manufacturing process, is a thermal driven method used to produce continuous fiber reinforced composites for engineering applications. Interlayer delamination is a significant concern for composites manufactured by FFF process. To address the problem of interlayer delamination and enhance the macro-mechanical properties of FFF fiber composites, it is necessary to study the thermal behavior of continuous fiber filled composites during the deposition process. A thermal simulation model with the consideration of continuous fiber was proposed. The numerical simulations reproduce the trends of experimental temperature evolution. When the continuous fiber phase is omitted from the heat transfer model, the predicted reheating temperature at the interface is lower compared to the temperature measured via IR monitoring. This result highlights the critical necessity of developing a numerical model that takes the continuous fiber phase into account in order to accurately predict the reheating temperature at the interface. Such a model is essential for deeper exploration into the adhesion mechanisms between adjacent layers and adjacent filaments.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"139 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976443","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 friction compensation on the slope of flow curves obtained by stack compression tests 摩擦补偿对堆叠压缩试验获得的流动曲线斜率的影响

Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-131

Martin L. Kölüs

{"title":"The effect of friction compensation on the slope of flow curves obtained by stack compression tests","authors":"Martin L. Kölüs","doi":"10.21741/9781644903131-131","DOIUrl":"https://doi.org/10.21741/9781644903131-131","url":null,"abstract":"Abstract. Knowing the large strain flow curve is essential for many simulation processes in the sheet metal forming technology. A prominent example is the clinching, when the strains are one magnitude higher than in tension, but a simple deep-drawing process could also lead to appropriately large strains. To obtain the flow stress - plastic strain curves beyond the range of tension, several processes are known. In the most multi-axial cases, a conversion factor based on the work equivalence is usually applied on the measurement results to obtain the equivalent quantities. However, at compressive experiments, the friction and the geometrical issues may distort the curve shape even further, hiding the real material behavior. In this study we investigate the effect of the friction determination method and the value of the friction coefficient on the curve shape. Pressure dependent and constant friction coefficients were inversely specified by disk compression tests and related finite element modeling. In possession of the friction values, the conversions of the physically measured compressive stress to equivalent flow stress during disk and stack compression tests with different height-diameter ratios are discussed here.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"57 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973219","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