Journal of Engineering Materials and Technology-transactions of The Asme最新文献_第7页

Friction and Wear Behavior of a Physical Vapor Deposition Coating Studied Using a Micro-Scratch Technique 用微划痕技术研究物理气相沉积涂层的摩擦磨损行为

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-01-01 DOI: 10.1115/1.4052239

K. Khlifi, H. Dhiflaoui, Chokri Ben Aissa, N. Barhoumi, A. Larbi

引用次数: 2

The Effect of Multipoles on the Elasto-Plastic Properties of a Crystal: Theory and Three-Dimensional Dislocation Dynamics Modeling 多极对晶体弹塑性性能的影响:理论与三维位错动力学建模

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-01-01 DOI: 10.1115/1.4052168

A. Siddique, Hojun Lim, T. Khraishi

引用次数: 4

Modeling Dislocation-Mediated Hydrogen Transport and Trapping in Face-Centered Cubic Metals 位错介导的氢在面心立方金属中的输运和俘获模型

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-01-01 DOI: 10.1115/1.4051147

Theodore Zirkle, L. Costello, T. Zhu, D. McDowell

{"title":"Modeling Dislocation-Mediated Hydrogen Transport and Trapping in Face-Centered Cubic Metals","authors":"Theodore Zirkle, L. Costello, T. Zhu, D. McDowell","doi":"10.1115/1.4051147","DOIUrl":"https://doi.org/10.1115/1.4051147","url":null,"abstract":"The diffusion of hydrogen in metals is of interest due to the deleterious influence of hydrogen on material ductility and fracture resistance. It is becoming increasingly clear that hydrogen transport couples significantly with dislocation activity. In this work, we use a coupled diffusion-crystal plasticity model to incorporate hydrogen transport associated with dislocation sweeping and pipe diffusion in addition to standard lattice diffusion. Moreover, we consider generation of vacancies via plastic deformation and stabilization of vacancies via trapping of hydrogen. The proposed hydrogen transport model is implemented in a physically based crystal viscoplasticity framework to model the interaction of dislocation substructure and hydrogen migration. In this study, focus is placed on hydrogen transport and trapping within the intense deformation field of a crack tip plastic zone. We discuss the implications of the model results in terms of constitutive relations that incorporate hydrogen effects on crack tip field behavior and enable exploration of hydrogen embrittlement mechanisms.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63502351","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: 2

Ex-situ Spectroscopic Characterization of Residual Effects of Thermomechanical Loading on Polyurea 热机械载荷对聚脲残余效应的非原位光谱表征

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-12-23 DOI: 10.1115/1.4053349

N. Huynh, G. Youssef

{"title":"Ex-situ Spectroscopic Characterization of Residual Effects of Thermomechanical Loading on Polyurea","authors":"N. Huynh, G. Youssef","doi":"10.1115/1.4053349","DOIUrl":"https://doi.org/10.1115/1.4053349","url":null,"abstract":"\u0000 The residual effect of thermally and mechanically loaded polyurea samples was investigated in this study using terahertz time-domain spectroscopy (THz-TDS), operating in the transmission mode. Samples of different thicknesses were submerged in liquid nitrogen and reached cryogenic isothermal condition before equilibrating at room temperature. Another set of samples were extracted from quasi-statically loaded strips. All samples were then interrogated using THz-TDS since terahertz waves exhibit nonionizing interactions with polymers, eliminating the need for any post-loading preparatory steps of the samples. The time-domain terahertz signals were used to extract the optical and electrical properties as a function of sample thickness and loading conditions. The residual effect was prominent in the mechanically loaded samples compared to a nearly negligible presence in thermally loaded ones. On average, the thermally loaded polyurea results were subtle compared to the results of the unloaded samples, whereas samples that were mechanically stretched showed a considerable difference. Spectral analysis reported the frequency-dependent, complex refractive index of virgin and loaded polyurea as a function of thickness and spectral peaks associated with fundamental vibrational modes of the polyurea structure. The spectral peaks were in good agreement with previous research while elucidating the residual effect via the disappearance of three peaks in the low terahertz regime for mechanically loaded samples. In general, the refractive index was dependent on the loading conditions. Terahertz spectroscopy was shown to be a promising tool for future in situ and in operando investigations of field-dependent polymer responses.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47684929","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

Experimental Evaluation of Tension and Shear Responses of Material Discontinuities in Origami-Based Sheet Metal Bending 折纸弯曲中材料不连续面拉伸和剪切响应的实验评价

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-12-03 DOI: 10.1115/1.4053145

Muhammad Ali Ablat, A. Alafaghani, Jian-Qiao Sun, A. Qattawi

{"title":"Experimental Evaluation of Tension and Shear Responses of Material Discontinuities in Origami-Based Sheet Metal Bending","authors":"Muhammad Ali Ablat, A. Alafaghani, Jian-Qiao Sun, A. Qattawi","doi":"10.1115/1.4053145","DOIUrl":"https://doi.org/10.1115/1.4053145","url":null,"abstract":"\u0000 Origami-based sheet metal (OSM) bending uses the origami concept to form a three-dimensional (3D) structures from a two-dimensional (2D) sheet by a series of bending operation. The OSM bending relies on a material discontinuity (MD) to perform the bending operation where the MDs are subjected to tension and shear load. Even though the OSM bending is a process that is simple, cost-effective, and easy to integrate into mass production, the understanding of the OSM bending mechanics is limiting its wide application. Particularly, the deformation behavior of MDs under tension and shear load remains unknown. Hence, this work investigates the response of MDs to these loads using the standard tension and shear tests. From the tests, critical values for two different ductile fracture criteria (DFC) are determined, and the possibility of a failure occurring in OSM bending is predicted. Results show that the load-bearing capability of the MDs is related to change in the effective cross-section area of a MD. Simple tension and shear tests can provide a simple procedure to predict failure in OSM bending. The impact of self-contact occurred under shear load influences maximum shear force and accuracy of failure prediction.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46950057","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

High Temperature Dynamic Mechanical Properties Characterization of Polymer Coatings via Nanoindentation 纳米压痕法表征聚合物涂层的高温动态力学性能

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-11-17 DOI: 10.1115/1.4053029

Y. Matsuda, Aref Samadi-Dooki, Yinjie Cen, Gisela Vazquez, Luke Bu

{"title":"High Temperature Dynamic Mechanical Properties Characterization of Polymer Coatings via Nanoindentation","authors":"Y. Matsuda, Aref Samadi-Dooki, Yinjie Cen, Gisela Vazquez, Luke Bu","doi":"10.1115/1.4053029","DOIUrl":"https://doi.org/10.1115/1.4053029","url":null,"abstract":"Polymer coatings are widely used in industrial applications. The mechanical properties of these polymer coatings are known to vary with temperature and deformation rate. The characterization of the dynamic mechanical properties of these coatings at high temperatures via traditional uniaxial testing is challenging due often to their brittleness and small size. In this paper, the mechanical properties of polymer coatings are reported with emphasis on their dynamic mechanical properties at temperatures up to 280 °C characterized by a dynamic nanoindentation technique with a sharp indenter tip. Nanoindentation was used to characterize the mechanical response with emphasis on dynamic mechanical properties of polymer coatings enclosed in a high-temperature stage. To verify the method, the viscoelastic properties of a reference PET were also characterized by uniaxial cyclic tensile testing which exhibited an excellent agreement with the proposed technique. The proposed nanoindentation method can be applied to other polymer coatings and thin films that are used in applications at high temperatures.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41360907","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

Prediction of the Onset of Failure in Elastomeric Solids with Weld Lines being Represented as Localized Regions of Lower Density 焊缝表示为低密度局部区域的弹性体固体失效发生的预测

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-11-05 DOI: 10.1115/1.4052923

Chellappa Karunakaran, Alagappan Ponnalagu, K. Kannan, K. Rajagopal

引用次数: 1

Comparing the Mechanical and Thermal Properties of PLA/Organosolv Lignin Biocomposites Made of Different Biomass for 3D Printing Applications 3D打印用不同生物质制备的聚乳酸/有机溶质木质素生物复合材料的力学和热性能比较

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-11-05 DOI: 10.1115/1.4052922

J. Obielodan, Maia Delwiche, D. Clark, Cassie Downing, Delanie Huntoon, Tsunghsueh Wu

{"title":"Comparing the Mechanical and Thermal Properties of PLA/Organosolv Lignin Biocomposites Made of Different Biomass for 3D Printing Applications","authors":"J. Obielodan, Maia Delwiche, D. Clark, Cassie Downing, Delanie Huntoon, Tsunghsueh Wu","doi":"10.1115/1.4052922","DOIUrl":"https://doi.org/10.1115/1.4052922","url":null,"abstract":"\u0000 This work investigates the differences in mechanical and thermal properties of polylactic acid (PLA)/lignin biocomposites made of four different unmodified organosolv lignin materials, three of which were extracted from different woody biomass (maple, oak, and pine) in-house, and one sourced commercially. Filaments made from blends of 30wt% and 40wt% of the in-house lignin and the commercially sourced lignin as fillers in PLA were used to 3D-print experimental test samples using fused filament fabrication (FFF) process. Statistically significant differences were observed in the mechanical properties based on tension testing and Izod impact testing, while differences in thermal properties based on differential scanning calorimetry (DSC) and thermogravimetric (TGA) analysis were less significant. Test samples with 30wt% lignin had tensile strengths that were higher than those of 40wt% lignin. Among the three in-house extracted lignin from the woody biomass resources, maple-based composites consistently yielded the highest tensile strengths while oak-based materials yielded the highest stiffness in tension testing and the most stability in impact resistance. The pine-based materials showed the most decline in strengths between 30wt% and 40wt% lignin loadings. The commercially obtained lignin at 30wt% and pine-based lignin at 40wt% yielded much higher percent elongations at failure than all other materials. This study demonstrates the influence of lignin biomass resources and their concentrations on the properties and performances of 3D printed specimens.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48193693","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: 5

Mechanical And Microstructural Performance Evaluation Of Diffusion Bonded Alloy 800H For Very High Temperature Nuclear Service 用于超高温核设施的扩散粘结合金800H的力学和微观结构性能评价

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-10-26 DOI: 10.1115/1.4052825

Heramb P. Mahajan, L. Maciel, T. Hassan

{"title":"Mechanical And Microstructural Performance Evaluation Of Diffusion Bonded Alloy 800H For Very High Temperature Nuclear Service","authors":"Heramb P. Mahajan, L. Maciel, T. Hassan","doi":"10.1115/1.4052825","DOIUrl":"https://doi.org/10.1115/1.4052825","url":null,"abstract":"\u0000 Very high temperature reactors (VHTRs) are planned to be operated between 550 to 950°C, and demand a thermally efficient intermediate heat exchanger (IHX) in the heat transport system (HTS). The current technological development of compact heat exchangers (CHXs) for VHTRs is at the ‘proof of concept’ level. A significant development in the CHX technologies is essential for the VHTRs to be efficient, cost-effective, and safe. CHXs have very high thermal efficiency and compactness, making them a prime candidate for IHXs in VHTRs. Photochemically etched plates with the desired channel pattern are stacked and diffusion bonded to fabricate CHXs. All plates are compressed at an elevated temperature over a specified period in the diffusion bonding process, promoting atomic diffusion and grain growth across bond surfaces resulting in a monolithic block. The diffusion bonding process changes the base metal properties, which are unknown for Alloy 800H, a candidate alloy for CHX construction. Hence, developing mechanical response data and understanding failure mechanisms of diffusion bonded Alloy 800H at elevated temperatures is a key step for advancing the technology of IHXs in VHTRs. The ultimate goal of this study is to develop ASME BPVC Section III, Division 5 design rules for CHXs in nuclear service. Towards this goal, mechanical performance and microstructures of diffusion bonded Alloy 800H is investigated through a series of tensile, fatigue, creep, and creep-fatigue tests at temperatures 550 to 760°C. The test results, failure mechanisms, and microstructures of diffusion bonded Alloy 800H is scrutinized and presented.","PeriodicalId":15700,"journal":{"name":"Journal of Engineering Materials and Technology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42411691","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: 5

Fabrication of Robust Superhydrophobic Nickel Films on Steel Surface with High Corrosion Resistance, Mechanical and Chemical Stability 具有高耐蚀性、机械和化学稳定性的钢表面超疏水镍膜的制备

IF 1.2 4区材料科学

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2021-10-19 DOI: 10.1115/1.4052768

B. A. Abd-El-Nabey, M. Ashour, A. M. Aly, M. E. Mohamed

引用次数: 8