Materials Testing最新文献_第9页

Mechanical and tribological behavior of a hybrid WC and Al2O3 reinforced Al–4Gr composite WC和Al2O3混杂增强Al-4Gr复合材料的力学和摩擦学性能

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-25 DOI: 10.1515/mt-2023-0040

Ünal Değirmenci

{"title":"Mechanical and tribological behavior of a hybrid WC and Al2O3 reinforced Al–4Gr composite","authors":"Ünal Değirmenci","doi":"10.1515/mt-2023-0040","DOIUrl":"https://doi.org/10.1515/mt-2023-0040","url":null,"abstract":"Abstract The development of aluminum (Al) based composites has been an interesting subject to sustain technological developments in the defense, automotive, and aerospace industries. In this study, the microstructure, mechanical, and tribological performances of hybrid Al composites reinforced with fixed ratio (4 %) graphite (Gr) and two different reinforcement materials such as tungsten carbide (WC) and aluminum oxide (Al2O3) at different ratios were investigated. The impact of hybrid reinforcement and its ratios on the relative density value and hardness performance were investigated. The results of three different loads (1, 2, and 3 N) and three different sliding distances (200, 300, and 400 m) on wear performance were analyzed using Taguchi’s L18 experimental design. High relative density (94.39 %) and hardness (74.26) values were achieved by hot pressing. It has been determined that hybrid reinforcements have positive effects on wear performance. The lowest SWR value was recorded as 7.82 × 10−5 mm3/N.m in composite no Al-6. As the applied load raised, the friction coefficients decreased. On the other hand, the sliding distance and the increased applied load caused the temperatures to rise. With Al–4Gr/WC–Al2O3 composite material, a new AMMC has been presented to the literature, which has remarkable hardness and wear properties, and can show better ductility and machinability compared to equivalent materials.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"188 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88597566","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

Thermal and mechanical properties of a new insulation composite material 一种新型保温复合材料的热力学性能

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-21 DOI: 10.1515/mt-2023-0035

Fatih Koçyiğit, A. Kaya

{"title":"Thermal and mechanical properties of a new insulation composite material","authors":"Fatih Koçyiğit, A. Kaya","doi":"10.1515/mt-2023-0035","DOIUrl":"https://doi.org/10.1515/mt-2023-0035","url":null,"abstract":"Abstract The Taguchi optimization method was used to optimize waste and natural different components such as waste marble dust, expanded perlite, perlite aggregate size, cement, and molten tragacanth in the production of new insulation composite material. Compressive strength, thermal conductivity, abrasion loss, and water adsorption properties of the developed composite material were investigated. Taguchi’s standard L18 array was chosen for optimization of these four components with different levels. Response plots were created using the Taguchi and the optimum test condition was determined. The insulation composite material with the best thermal and mechanical properties was obtained under the condition of waste marble dust (1), expanded perlite (1), perlite aggregate size (1) and molten tragacanth (1). In addition, using the anova (Analysis of Variance), percentage impacts on the mechanical and thermal properties of the test parameters were determined. Statistical values obtained from anova and mathematical models are developed by using multi-linear regression method. It was found that the mathematical model and the experimental results were quite compatible. The optimum test conditions detected were verified by confirmation experiments. Confirmation experiment results were obtained between 99.9 % confidence interval values.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"16 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78499429","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

Indentation creep behavior of Fe–8Ni–xZr oxide dispersion strengthened alloys Fe-8Ni-xZr氧化物弥散强化合金的压痕蠕变行为

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-20 DOI: 10.1515/mt-2023-0030

Mustafa Tekin, F. Muhaffel, H. Kotan, M. Baydoğan

{"title":"Indentation creep behavior of Fe–8Ni–xZr oxide dispersion strengthened alloys","authors":"Mustafa Tekin, F. Muhaffel, H. Kotan, M. Baydoğan","doi":"10.1515/mt-2023-0030","DOIUrl":"https://doi.org/10.1515/mt-2023-0030","url":null,"abstract":"Abstract This study was conducted to understand the creep behavior of two oxide dispersion strengthened alloys containing Zr as the alloying addition by performing indentation creep tests at room temperature. The oxide dispersion strengthened alloys were Fe–8Ni–xZr (x = 1 and 4 at.%, i.e., Zr-1 and Zr-4 alloys, respectively), which had been previously fabricated by mechanical alloying; followed by consolidation via equal channel angular extrusion at 1000 °C. The indentation tests were conducted under a maximum load of 100 mN with the loading rates at 300 and 400 mN min−1. The hardness was calculated by the Oliver–Pharr method, and the creep properties, such as the creep displacement, creep strain rate, creep stress, and stress exponent n, were determined. The results showed that the Zr-4 alloy was harder than the Zr-1 alloy. However, the creep resistance of the Zr-1 alloy was better than that of the Zr-4 alloy. It was further demonstrated that both the hardness and creep resistance depended on the loading rate. Moreover, a possible creep mechanism was proposed. Although the tests were performed at room temperature, they can provide insight into the effect of an oxide dispersion strengthened alloys microstructure on creep at higher temperatures.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79163943","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

Decarburization effects on high-cycle fatigue of uncoated press hardened steels 脱碳对未涂覆压硬化钢高周疲劳的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-12 DOI: 10.1515/mt-2023-0009

T. Başer, O. G. Bilir, Ahmet Onaylı, Alperen Bayram, Burak Barutçuoğlu, Mustafa Uzunboy, E. Erişir

{"title":"Decarburization effects on high-cycle fatigue of uncoated press hardened steels","authors":"T. Başer, O. G. Bilir, Ahmet Onaylı, Alperen Bayram, Burak Barutçuoğlu, Mustafa Uzunboy, E. Erişir","doi":"10.1515/mt-2023-0009","DOIUrl":"https://doi.org/10.1515/mt-2023-0009","url":null,"abstract":"Abstract The decarburization layer can be detrimental and lead failures in press hardened steels. This work investigates the effect of decarburization layer on the fatigue crack origination and growth on press hardened parts of uncoated 22MnB5 steel. The decarburization layer was analyzed by light microscope, scanning electron microscope, and microhardness measurements. It was found that decarburization layer has two distinct zones indicating complete and partial decarburization. To understand the effect of decarburization on crack origination, high cycle fatigue tests were performed on samples from press hardened parts in decarburized and polished (nondecarburized) conditions. The results have shown that the fatigue performance of press hardened steels in polished condition outperforms the fatigue samples in decarburized condition. In fractographic investigations, it was seen that decarburization is not only responsible for crack origination but also affects crack propagation by having full and partial decarburization zones. The full decarburization zone was acted as surface crack origination source. In the partial decarburization zone, the crack propagation behavior was changed by a complex phase microstructure of bainite, ferrite, and martensite.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83098523","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

Crushing performance and optimization of bio-inspired multi-cell columns 仿生多细胞柱的破碎性能及优化

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-06 DOI: 10.1515/mt-2023-0046

İsmail Öztürk

引用次数: 0

A multi-strategy boosted prairie dog optimization algorithm for global optimization of heat exchangers 换热器全局优化的多策略推进土拨鼠优化算法

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-05 DOI: 10.1515/mt-2023-0082

Dildar Gürses, Pranav Mehta, S. M. Sait, Sumit Kumar, A. Yıldız

{"title":"A multi-strategy boosted prairie dog optimization algorithm for global optimization of heat exchangers","authors":"Dildar Gürses, Pranav Mehta, S. M. Sait, Sumit Kumar, A. Yıldız","doi":"10.1515/mt-2023-0082","DOIUrl":"https://doi.org/10.1515/mt-2023-0082","url":null,"abstract":"Abstract In this article, a new prairie dog optimization algorithm (PDOA) is analyzed to realize the optimum economic design of three well-known heat exchangers. These heat exchangers found numerous applications in industries and are an imperative part of entire thermal systems. Optimization of these heat exchangers includes knowledge of thermo-hydraulic designs, design parameters and critical constraints. Moreover, the cost factor is always a challenging task to optimize. Accordingly, total cost optimization, including initial and maintenance, has been achieved using multi strategy enhanced PDOA combining PDOA with Gaussian mutation and chaotic local search (MSPDOA). Shell and tube, fin-tube and plate-fin heat exchangers are a special class of heat exchangers that are utilized in many thermal heat recovery applications. Furthermore, numerical evidences are accomplished to confirm the prominence of the MSPDOA in terms of the statistical results. The obtained results were also compared with the algorithms in the literature. The comparison revealed the best performance of the MSPDOA compared to the rest of the algorithm. The article further suggests the adaptability of MSPDOA for various real-world engineering optimization cases.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"4 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86617552","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

A new manufacturing process for allogeneic bone plates based on high hydrostatic pressure–treated granules for jaw augmentation 基于高静水压力处理颗粒的异体骨板制造新工艺

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-04 DOI: 10.1515/mt-2023-0004

Constantin Leon Graw, Janine Waletzko-Hellwig, Jan-Oliver Sass, Mario Jackszis, B. Frerich, Rainer Bader, M. Dau

{"title":"A new manufacturing process for allogeneic bone plates based on high hydrostatic pressure–treated granules for jaw augmentation","authors":"Constantin Leon Graw, Janine Waletzko-Hellwig, Jan-Oliver Sass, Mario Jackszis, B. Frerich, Rainer Bader, M. Dau","doi":"10.1515/mt-2023-0004","DOIUrl":"https://doi.org/10.1515/mt-2023-0004","url":null,"abstract":"Abstract Currently used methods for processing allogeneic bone grafts like gamma irradiation are connected with downside of altering the mechanical properties of the graft. As an alternative, high hydrostatic pressure (HHP) leads to an effective devitalization of cells without influencing the bone matrix and its mechanical behavior. To address the clinical application, bone plates were prepared out of HHP-treated bone granules, which are conceivable for augmentations in the jaw region. In order to achieve sufficient mechanical strength, two different adhesives were tested. Mechanical characterization by three-point bending tests was performed. Furthermore, analysis regarding cytotoxicity as well as colonization experiments with mesenchymal stem cells were performed to investigate osteoconductive properties of the bone plates. While plates composed of fibrin glue showed better biocompatibility, plates prepared with Loctite® 408 showed better mechanical properties and could be incorporated in a model application. Regardless of the adhesive, bone plates induced osteogenic differentiation compared to cells cultured without bone plates. Although an adhesive combining both properties would be necessary for later clinical application, the study at hand demonstrates the possibility of producing allogeneic bone plates from HHP-treated granules, which meet the basic requirements for jaw augmentation.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"115 1","pages":"1155 - 1166"},"PeriodicalIF":2.5,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73126027","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

Optimization of cutting parameters by thrust force and time for drilling of aluminum 2024 T351 基于推力和时间的2024 T351铝合金钻孔切削参数优化

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-07-03 DOI: 10.1515/mt-2023-0001

Yunus Zubeyir Turgut, M. Ozsoy

引用次数: 0

Frontmatter 头版头条

4区材料科学

Materials Testing Pub Date : 2023-07-01 DOI: 10.1515/mt-2023-frontmatter7

引用次数: 0

Cheetah optimization algorithm for optimum design of heat exchangers 换热器优化设计的猎豹优化算法

IF 2.5 4区材料科学