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Investigation into microstructure and mechanical properties of heavy section nickel alloyed austempered ductile iron in accordance with austempering parameters 根据等温回火参数对大断面镍合金球铁的组织和力学性能进行了研究
Material Design & Processing Communications Pub Date : 2021-03-11 DOI: 10.1002/mdp2.220
Mohammad Ghoroghi, Nasser Varahram, Yasaman Perseh
{"title":"Investigation into microstructure and mechanical properties of heavy section nickel alloyed austempered ductile iron in accordance with austempering parameters","authors":"Mohammad Ghoroghi,&nbsp;Nasser Varahram,&nbsp;Yasaman Perseh","doi":"10.1002/mdp2.220","DOIUrl":"10.1002/mdp2.220","url":null,"abstract":"<p>Austempered ductile iron (ADI) is one of the most widely used types of ductile iron produced by austempering heat treatment. ADI heavy section parts are employed in different industries owing to their unique mechanical properties.</p><p>Cooling rate in thick parts is significantly low, so heavy section ductile iron parts should have an adequate austemperability for preventing pearlite formation in the middle of the casting. In order to achieve the proper austemperability and fully ausferritic structure, alloying elements like nickel are added to the melt.</p><p>The objective of this work is to study the role of austempering parameters on nickel alloyed ADI specimens fabricated from 75-mm-thick Y-block. Austempering temperature and time as main parameters in the austempering process are taken as the control variables. The heat treatment of austempering was performed at 320°C and 380°C for 60, 120, 180, and 240 min. It was possible to determine the best austempering conditions among those investigated in the paper, and the results showed that austempering at a higher temperature contributes to higher strength and hardness compared to lower austempering temperature. Furthermore, specimens that were austempered at 320°C for 120 min had better mechanical properties among other samples.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84268533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Stress concentration due to the presence of a hole within the context of elastic bodies 由于弹性体中存在孔洞而引起的应力集中
Material Design & Processing Communications Pub Date : 2021-03-02 DOI: 10.1002/mdp2.219
Pavitra Tejaswi Murru, Kumbakonam R. Rajagopal
{"title":"Stress concentration due to the presence of a hole within the context of elastic bodies","authors":"Pavitra Tejaswi Murru,&nbsp;Kumbakonam R. Rajagopal","doi":"10.1002/mdp2.219","DOIUrl":"10.1002/mdp2.219","url":null,"abstract":"<p>Many rocks, metals, and concrete are porous, in fact most materials are porous. This would then imply that their properties depend on the density. In this report, we develop a constitutive relation to describe the response of elastic bodies that are linear in both the stress and the linearized strain with the material moduli depending on the density. Such a model is not possible within the context of the classical theory of linearized elasticity but is possible within the context of the implicit theory for elastic bodies that has been developed. The constitutive relations discussed in this paper can be useful to describe the response of porous elastic bodies in the small displacement gradient regime. Using these constitutive relations, we study the stress concentration due to the presence of a circular hole in a plate due to uniaxial extension. We find that the stress concentration factor can be significantly different from that in the case of the classical linearized elastic solid.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.219","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"104989973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Preparation and properties of battery material nano-LiFePO4 纳米lifepo4电池材料的制备及性能研究
Material Design & Processing Communications Pub Date : 2021-02-12 DOI: 10.1002/mdp2.218
Yajun Mao
{"title":"Preparation and properties of battery material nano-LiFePO4","authors":"Yajun Mao","doi":"10.1002/mdp2.218","DOIUrl":"10.1002/mdp2.218","url":null,"abstract":"<p>In this study, nano-LiFePO4 as the cathode material of lithium battery was prepared by different processes, and its micromorphology, crystal structure, and electrochemical performance were tested. Lithium iron phosphate was prepared by the high-temperature solid-state method and gel–sol method. The micro morphology of the product was detected by an electron microscope. The crystal structure of the product was detected by an X diffractometer. The electrochemical performance of the product was tested by charge and discharge. The results showed that the lithium iron phosphate prepared by the gel–sol method had a smaller particle size and more regular shape; the diffraction pattern of the two kinds of lithium iron phosphate was nearly consistent, but the lithium iron phosphate prepared by the gel–sol method had smaller diffraction intensity because of its smaller particle size; the lithium iron phosphate prepared by the gel–sol method were more stable and efficient and had a larger capacity during charging and discharging.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.218","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110898892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Evaluation of quenched ductile iron mechanical behavior under compressive loads 压缩载荷下淬火球墨铸铁力学性能的评价
Material Design & Processing Communications Pub Date : 2021-01-13 DOI: 10.1002/mdp2.217
Ricardo A. Martínez
{"title":"Evaluation of quenched ductile iron mechanical behavior under compressive loads","authors":"Ricardo A. Martínez","doi":"10.1002/mdp2.217","DOIUrl":"10.1002/mdp2.217","url":null,"abstract":"<p>Among the mechanical properties already evaluated in ductile iron, could be mentioned tensile strength, bend, impact Charpy, fracture toughness and fatigue. However, an aspect no longer explored over the mechanical properties of these materials is concerned with the behavior under compressive loads. In this work, compressive properties are evaluated on quenched ductile iron, which is considered at first as an appropriate alternative for mechanical applications with this kind of load. The evaluation was performed by means of compression tests on cylindrical samples. Further application of compressive loads was explored using the tests known as the Brazilian test, which involves the use of a disc compressed along the diameter line. The results obtained are the first attempt of a complete study involving the different choices of ductile iron.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91107894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dimensional metrology of additively manufactured lattice structures by combined tactile probe and X-ray tomography 用触觉探针和x射线断层摄影相结合的增材制造晶格结构的尺寸测量
Material Design & Processing Communications Pub Date : 2020-12-28 DOI: 10.1002/mdp2.216
Anton du Plessis, Gerd Schwaderer, Ilaria Cristofolini, Marco Zago, Matteo Benedetti
{"title":"Dimensional metrology of additively manufactured lattice structures by combined tactile probe and X-ray tomography","authors":"Anton du Plessis,&nbsp;Gerd Schwaderer,&nbsp;Ilaria Cristofolini,&nbsp;Marco Zago,&nbsp;Matteo Benedetti","doi":"10.1002/mdp2.216","DOIUrl":"10.1002/mdp2.216","url":null,"abstract":"<p>Additive manufacturing allows high complexity of manufactured structures, permitting entirely new design capabilities. In the context of complex design, lattice structures hold the most promise for high complexity, tailorable and ultra-lightweight structures. These unique structures are suitable for various applications including light-weighting, energy absorption, vibration isolation, thermal management amongst many others. This new complexity leads to new manufacturing quality control and metrology challenges. Traditional metrology tools cannot access the entire structure, and the only reliable method to inspect the inner details of these structures is by X-ray computed tomography (CT). This work highlights the challenges of this process, demonstrating a novel workflow for dimensional metrology of coupon lattice samples—using a combination of surface and internal metrology using tactile probe and CT. This dual combined approach uses traditional surface coordinate measurement on exterior accessible surfaces, which is followed by internal lattice measurements. The results show a clear method and workflow for combining these technologies for a holistic dimensional inspection. The confidence gained by inspection of such lattice coupons will support the application of these lattices in end-use parts.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.216","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110764155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Micromechanical simulation of fatigue in nodular cast iron under stress-controlled loading 应力控制载荷下球墨铸铁疲劳细观力学模拟
Material Design & Processing Communications Pub Date : 2020-11-27 DOI: 10.1002/mdp2.214
Mehul Lukhi, Meinhard Kuna, Geralf Hütter
{"title":"Micromechanical simulation of fatigue in nodular cast iron under stress-controlled loading","authors":"Mehul Lukhi,&nbsp;Meinhard Kuna,&nbsp;Geralf Hütter","doi":"10.1002/mdp2.214","DOIUrl":"10.1002/mdp2.214","url":null,"abstract":"<p>Nodular cast iron contains about 10 vol% of graphite particles, which debond easily and thus act as nucleation sites of voids. When an elastic–plastic porous material is subjected to cyclic loading, voids grow with each load cycle due to so-called void ratchetting until the micro-ligaments between the graphite particles begin to neck. The cyclic necking leads to void coalescence and finally to the formation of a macroscopic crack. This mechanism is modeled in this study to explain fatigue failure under stress-controlled loading. For this purpose, an axisymmetric cell model is developed and cycle by cycle simulations are performed until final failure. From the simulation results, stress-life curves are extracted and compared with experimental data collected from literature. The effects of the shape of graphite particle, type of matrix material hardening, and mean stress on the fatigue life of nodular cast iron are studied.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.214","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"102429904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental analysis of influence factors on pavement concrete performance: Different content of stone powder in manufactured sand 影响路面混凝土性能因素的试验分析:制砂中石粉含量的不同
Material Design & Processing Communications Pub Date : 2020-11-13 DOI: 10.1002/mdp2.213
Jing Chen
{"title":"Experimental analysis of influence factors on pavement concrete performance: Different content of stone powder in manufactured sand","authors":"Jing Chen","doi":"10.1002/mdp2.213","DOIUrl":"https://doi.org/10.1002/mdp2.213","url":null,"abstract":"<p>At present, due to the unclear understanding of the mixed proportion of stone powder in the manufactured sand, the quality of finished concrete is affected. In this study, the concrete was mixed with manufactured sand containing 0%, 5%, 10%, and 15% stone powder and poured into standard models. The compressive strength of the concrete was obtained by measuring the pressure; the dry shrinkage rate of the concrete was obtained by measuring the volume; the impermeability was evaluated by the seepage height method. The results demonstrated that the increase of stone powder content resulted in the enhancement of concrete compressive strength and impermeability, but blindly adding stone powder led to the deterioration of concrete anti-shrinkage performance. Finally, the comparison of the overall experimental data showed that 10% of stone powder could make all aspects of the performance of the concrete optimal.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.213","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92325485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Recent trends in X-ray-based characterization of nodular cast iron 球墨铸铁x射线表征的最新趋势
Material Design & Processing Communications Pub Date : 2020-10-30 DOI: 10.1002/mdp2.212
Tito Andriollo, Chaoling Xu, Yubin Zhang, Niels Skat Tiedje, Jesper Hattel
{"title":"Recent trends in X-ray-based characterization of nodular cast iron","authors":"Tito Andriollo,&nbsp;Chaoling Xu,&nbsp;Yubin Zhang,&nbsp;Niels Skat Tiedje,&nbsp;Jesper Hattel","doi":"10.1002/mdp2.212","DOIUrl":"10.1002/mdp2.212","url":null,"abstract":"<p>Through various examples, this short review presents the main X-ray-based techniques that are available to characterize nodular cast iron at the microstructural level. Emphasis is placed on the enormous potential offered by the recent developments in X-ray tomography, X-ray diffraction, and digital volume correlation, which allow collecting microstructural and micromechanical information in 4D (3D plus time) during both casting and subsequent mechanical loading. The goal is to demonstrate that for nodular cast iron, which has an inherently three-dimensional, composite microstructure, X-ray-based techniques provide some significant advantages over conventional microscopy. For this reason, these techniques can be instrumental in unveiling the mechanisms controlling both the formation of the microstructure as well as its micromechanical behavior during in-service loading, thus paving the way to the development of improved process–structure–property relations.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"93950474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
High-entropy eutectic composites with high strength and low Young's modulus 高强低杨氏模量的高熵共晶复合材料
Material Design & Processing Communications Pub Date : 2020-10-29 DOI: 10.1002/mdp2.211
Tapabrata Maity, Konda Gokuldoss Prashanth, Özge Balcı, Grzegorz Cieślak, Maciej Spychalski, Tadeusz Kulik, Jürgen Eckert
{"title":"High-entropy eutectic composites with high strength and low Young's modulus","authors":"Tapabrata Maity,&nbsp;Konda Gokuldoss Prashanth,&nbsp;Özge Balcı,&nbsp;Grzegorz Cieślak,&nbsp;Maciej Spychalski,&nbsp;Tadeusz Kulik,&nbsp;Jürgen Eckert","doi":"10.1002/mdp2.211","DOIUrl":"10.1002/mdp2.211","url":null,"abstract":"<p>Recent studies on Co–Cr–Fe–Ni–Nb<sub><i>x</i></sub> (x = molar ratio) high-entropy alloys (HEAs) have revealed that high-pressure torsion (HPT) induced severe straining improves the load-bearing ability of eutectic HEAs. Nanoindentation using a Berkovich indenter was employed to investigate the influence of severe straining on the rate-dependent strength responses in eutectic, proeutectic, and single-phase Co–Cr–Fe–Ni–Nb<sub><i>x</i></sub> HEAs. The results reveal that the nature of the microstructure evolution after severe straining significantly affects Young's modulus and the yield strength in eutectic Co–Cr–Fe–Ni–Nb<sub>0.65</sub>. The excellent combination of high strength with lower Young's modulus is crucial for opening new sights in lamellar eutectics for possible application as next-generation advanced materials.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109476421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fatigue life assessment of DCI smooth specimens DCI光滑试件疲劳寿命评价
Material Design & Processing Communications Pub Date : 2020-10-23 DOI: 10.1002/mdp2.210
Sabrina Vantadori, Camilla Ronchei, Andrea Zanichelli, Daniela Scorza
{"title":"Fatigue life assessment of DCI smooth specimens","authors":"Sabrina Vantadori,&nbsp;Camilla Ronchei,&nbsp;Andrea Zanichelli,&nbsp;Daniela Scorza","doi":"10.1002/mdp2.210","DOIUrl":"10.1002/mdp2.210","url":null,"abstract":"<p>Ductile cast iron (DCI) structural components are commonly employed in a wide range of industrial applications. The increasing use of DCI is justified by the good combination of mechanical and technological properties. Another advantage, not negligible, is the low production cost. The goal of the present paper is to estimate the lifetime of ductile cast iron smooth specimens under multiaxial fatigue loading, by using the multiaxial critical plane-based criterion proposed by Carpinteri and others. The obtained results in terms of fatigue life are quite satisfactory, because they fall into the scatter band 3 in almost all loading conditions examined. Finally, the accuracy of the criterion is compared with that obtained by using two stress invariant-based criteria.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105904515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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