Advanced Composites Letters最新文献_第4页

Metallographic organization and tensile properties of FSSP-modified H62 copper alloy surface FSSP改性H62铜合金表面的金相组织和拉伸性能

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-06-05 DOI: 10.1177/2633366X20927025

W. Song, Xiaojing Xu, Sheng-rong Liu, J. Pu, Hongfeng Wang

{"title":"Metallographic organization and tensile properties of FSSP-modified H62 copper alloy surface","authors":"W. Song, Xiaojing Xu, Sheng-rong Liu, J. Pu, Hongfeng Wang","doi":"10.1177/2633366X20927025","DOIUrl":"https://doi.org/10.1177/2633366X20927025","url":null,"abstract":"In this study, the surface of friction stir surface processing (FSSP)-modified copper alloy was altered by different passes of modification and lower pressure after selecting FSSP process parameters. The results showed that the grain size of the modified copper alloy surface was refined under various processes. In the modified section, the grains changed from fine equiaxed grains to rolling strips from the surface layer to the bottom of copper alloy sheet. FSSP could change the surface metallographic organization but could not change the internal structure of the sheet. The hardness values of samples obtained under various processes were higher than those of base metal, but the hardness of modified boundary region was slightly lower than that of base metal. The tensile strength of samples obtained under various processes was higher than that of base metal. Among them, FSSP was the best after one pass of modification, followed by two passes, and the worst was three passes. Most of the stretches appeared on the advancing side, and only a few appeared on the retreating side. The tensile parts had a honeycomb-type morphology, with a ductile fracture mode.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20927025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47003328","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: 3

Development of a composite friction modifier with carbon nanotubes for applications at the wheel–rail interface 用于轮轨界面的碳纳米管复合摩擦改进剂的研制

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-06-03 DOI: 10.1177/2633366X20930019

J. Vélez, Jesús Antonio Carlos Cornelio, R. Sierra, J. F. Santa, L. Hoyos-Palacio, R. Nevshupa, A. Toro

{"title":"Development of a composite friction modifier with carbon nanotubes for applications at the wheel–rail interface","authors":"J. Vélez, Jesús Antonio Carlos Cornelio, R. Sierra, J. F. Santa, L. Hoyos-Palacio, R. Nevshupa, A. Toro","doi":"10.1177/2633366X20930019","DOIUrl":"https://doi.org/10.1177/2633366X20930019","url":null,"abstract":"Wear of wheels and rails is a major problem in railway transportation industry. Solid lubricants constitute a cost-efficient alternative to control wear and friction at the wheel–rail interface, especially when a fine-tuned balance between traction force and energy consumption is sought. In this work, composite friction modifiers (CFMs) composed of a vinyl ester matrix reinforced with molybdenum disulfide and carbon nanotubes were developed. The total solid additive content was less than a half in comparison with a commercial product available on the market, which was used as a reference. A benchmarking study of the CFM was carried out by means of tribological tests in a twin-disc machine at a contact pressure of 1.1 GPa and different slip values. The results indicated that the developed CFM reduce coefficient of traction by 10% compared to unlubricated conditions that is similar to the reference. However, the total mass loss of steel components due to wear under CFM lubrication was lower than in the reference test.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20930019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49450755","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: 4

The effect of Ti on the microstructure and mechanical properties of (Ti + Mg3Sb2)/Mg composites Ti对(Ti + Mg3Sb2)/Mg复合材料显微组织和力学性能的影响

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-06-03 DOI: 10.1177/2633366X20930029

Bo Li, W. Long, Xiaoping Zhou

引用次数: 2

Further study on thermal deformation reduction for CFRP-based improved ball screws cfrp基改进滚珠丝杠的热变形减小研究

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-29 DOI: 10.1177/2633366X20917981

Xiang-sheng Gao, Yueyang Guo, Min Wang, Tao Zan

{"title":"Further study on thermal deformation reduction for CFRP-based improved ball screws","authors":"Xiang-sheng Gao, Yueyang Guo, Min Wang, Tao Zan","doi":"10.1177/2633366X20917981","DOIUrl":"https://doi.org/10.1177/2633366X20917981","url":null,"abstract":"To determine the thermal deformation of ball screw in actual working condition, a novel method for determining thermal deformation of ball screws in complicated working condition is proposed based on G-code and finite-element (FE) method. In the complicated working condition, it is difficult to obtain and import the nut movement into FE model due to the complex nut movement. In this research, the nut movement is directly determined from G-code by MATLAB code programming. The nut location is recorded with time in a file. The thermal parameters can be determined according to the nut speed with time as well. In the implicit FE analysis, the nut location is read from the input file instead of nut location calculation before every time step. And then, the effect of factors, such as working condition and materials, on thermal deformation reduction of ball screw is studied. The thermal deformation reduction of ball screws under different rotational speed, actual working condition, and different axial elastic modulus of composites is discussed, which can provide the guidelines to evaluate the thermal deformation reduction and design the composite in improved ball screws.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20917981","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46580264","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

Properties of calcium sulfoaluminate cement-based grouting materials with LiAl-layered double hydroxides slurries 硫铝酸钙水泥基lial层状双氢氧化物浆料注浆材料的性能

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-29 DOI: 10.1177/2633366X20926522

Haiyan Li, Xianping Wang, X. Guan, Dinghua Zou

{"title":"Properties of calcium sulfoaluminate cement-based grouting materials with LiAl-layered double hydroxides slurries","authors":"Haiyan Li, Xianping Wang, X. Guan, Dinghua Zou","doi":"10.1177/2633366X20926522","DOIUrl":"https://doi.org/10.1177/2633366X20926522","url":null,"abstract":"In this study, LiAl-layered double hydroxides Lithium aluminum hydrotalcite (LiAl-LDH) with different specific surface area were prepared by the separate nucleation and aging steps (SNAS) method and then were employed to prepare calcium sulfoaluminate cement-based grouting material (CBGM) paste. The influence of LiAl-LDH slurries on fresh and hardened properties of the CBGM paste was investigated in terms of fluidity, stability, setting time, and compressive strength. Additionally, the hydration process and hydration products of the CBGM paste were characterized by hydration heat, X-ray diffraction, differential thermal analysis–thermogravimetry, and Fourier transform infrared analyses. The acquired results illustrated that LiAl-LDH with larger specific surface area led to a faster hydration rate at early age, a lower fluidity, a shorter setting time, and a higher stability. Furthermore, due to the crystal nucleation effect, the addition of LiAl-LDH slurries did not cause a new phase to form but changed the morphology and increased the amount of hydration products, yielding higher compressive strength.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20926522","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42736589","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: 4

Effect of hygrothermal aging on the mechanical properties of IMA/M21E aircraft-grade CFRP composite 湿热老化对IMA/M21E航空级CFRP复合材料力学性能的影响

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-22 DOI: 10.1177/2633366X20926520

K. Shetty, Ramesh Bojja, S. Srihari

{"title":"Effect of hygrothermal aging on the mechanical properties of IMA/M21E aircraft-grade CFRP composite","authors":"K. Shetty, Ramesh Bojja, S. Srihari","doi":"10.1177/2633366X20926520","DOIUrl":"https://doi.org/10.1177/2633366X20926520","url":null,"abstract":"Unidirectional carbon fiber-reinforced plastic (CFRP) IMA/M21E polymer composite was manufactured by standard autoclave curing method. This is a new aircraft-grade CFRP composite presently used in the manufacture of aircraft wing parts. Test specimens as per ASTM standards for weight gain, tensile and compression tests were obtained from this composite laminates. Some of the test specimens were subjected to hygrothermal (hot–wet) aging in an environmental chamber under three different conditions, that is, (i) 45°C/85% relative humidity (RH), (ii) 70°C/85% RH and (iii) 55°C/100% RH until reaching moisture absorption saturation. Matrix-dominated mechanical properties, that is, transverse tensile and longitudinal compression were determined for dry and hygrothermally aged test specimens. During mechanical testing in a servo-hydraulic test machine, the respective hygrothermal conditions were maintained while testing. It was noted that the rate of moisture absorption increases progressively and reaches saturation around 0.76–1.24 wt% depending on the aging conditions. Moisture absorption followed Fickian diffusion behavior in all the conditions of the study. Also, a software program was developed to predict the moisture content and time of saturation. The predicted results from this software program correlated with experimental results. It was observed that the presence of moisture reduced the tensile strength significantly by about 9–31% and compression strength by about 2–8%. Microscopic observation of tested samples was carried out using scanning electron microscope to study the failure behavior.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20926520","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48123280","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: 8

Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser Er: YAG和二极管激光漂白后树脂水泥与牙釉质剪切结合强度的评价

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-05 DOI: 10.1177/2633366X19899961

Akin Ceyda, Sevimay Müjde, Ozyilmaz Ozgun Yusuf, Cokuk Neslihan

{"title":"Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser","authors":"Akin Ceyda, Sevimay Müjde, Ozyilmaz Ozgun Yusuf, Cokuk Neslihan","doi":"10.1177/2633366X19899961","DOIUrl":"https://doi.org/10.1177/2633366X19899961","url":null,"abstract":"Objective: The shear bond strength (SBS) of composite resin cement and color change to enamel bleached with two different concentrations of hydrogen peroxide (HP) bleaching agents in combination with two different laser applications was evaluated. Materials and Methods: The Er: YAG laser (λ = 2940 nm) and diode laser (λ = 940 nm) were used with the bleaching agent consisting of 40% HP opalescence (Opalescence Xtra Boost, Ulgen, South Jordan, UT, USA) and 35% HP whiteness (Whiteness HP Blue, FGM Dental Products, Joinville, SC, Brazil). Seventy-two human extracted teeth were randomly divided into two groups: For the 40% HP treatment, 36 specimens were divided into three subgroups: (1) HP agent with no laser treatment, (2) HP agent treated with Er: YAG laser, and (3) HP agent treated with diode laser. The same protocol was performed for the 35% HP. The color change was analyzed using the Commission Internationale de l’ Eclairage (CIE) L*a*b* system and surface roughness was analyzed by an atomic force microscope. The specimens were bonded with resin cement and a shear bond test was performed at 0.5 mm/min. The failure surfaces were evaluated using scanning electron microscope analysis. Results: ΔE value of the 40% HP + Er: YAG group was significantly higher than the other groups while diode groups showed the lower SBS values than the control groups (p < 0.05). Conclusions: The Er: YAG laser with 40% HP may be effective for the brighter teeth and the use of Er: YAG laser produced higher adhesion between enamel and resin cement than diode laser.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X19899961","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48151398","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

Tool reliability of sintered diamond drill bit for processing silicon carbide ceramics based on Bayesian theory 基于贝叶斯理论的硬质硅陶瓷烧结金刚石钻头刀具可靠性研究

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-05 DOI: 10.1177/2633366X20923672

Wensen Guo, Weiwei Shi, S. Hu, Hong-qun Tang

{"title":"Tool reliability of sintered diamond drill bit for processing silicon carbide ceramics based on Bayesian theory","authors":"Wensen Guo, Weiwei Shi, S. Hu, Hong-qun Tang","doi":"10.1177/2633366X20923672","DOIUrl":"https://doi.org/10.1177/2633366X20923672","url":null,"abstract":"Silicon carbide (SiC) ceramics, as a superhard nonmetallic material, would induce severe tool wear during drilling. To ensure the quality of processing, the drill bits must be replaced in advance before failure, which leads to serious waste without effective usage. Aiming at the tool reliability problem determined by the tool wear during drilling of the high hardness nonmetallic materials, this article proposed a reliability analysis method of sintered diamond drill bit for machining SiC ceramics based on the distribution of tool degradation increment and the modeling of gamma process, and a tool reliability model of degradation increment was established based on the Bayesian theory. The drilling experiment of sintered SiC ceramics was carried out by sintering diamond drill bit to obtain the degradation increment data. The accuracy of the model was tested by the reliability model deviation rate, which indicated that the reliability model with considering individual differences was more accurate. This research can provide a theoretical model and analytical method for improving the reliability of the nonmetallic brittle material processing tools.","PeriodicalId":55551,"journal":{"name":"Advanced Composites Letters","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2020-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633366X20923672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48790405","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

Compressive behavior and energy absorption capacity of unconstrained and constrained open-cell aluminum foams 无约束和约束开孔泡沫铝的压缩性能和吸能能力

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-05-04 DOI: 10.1177/2633366X20923671

Chengbing Li, Chunxing Li, Ya-Zheng Wang

引用次数: 1

Fabrication of lightweight and high-strength carbon fiber-reinforced poly(ethylene-2,6-naphthalene) solid and foam composites 轻质高强度碳纤维增强聚（乙烯-2,6-萘）固体和泡沫复合材料的制备

IF 2.4 4区材料科学

Advanced Composites Letters Pub Date : 2020-04-30 DOI: 10.1177/2633366X20922550

Yi-Fan Chen, Ying‐Guo Zhou, Ming Huang

引用次数: 3