Defect and Diffusion Forum最新文献

Estimation of the Lattice Parameter and Lattice Distortion Based on the Results of Ab Initio Study of Structural Fragments of TiVZrNbMo, TiVZrNbHf, and TiVZrNbTa Multicomponent Alloys 基于 TiVZrNbMo、TiVZrNbHf 和 TiVZrNbTa 多组分合金结构碎片的 Ab Initio 研究结果对晶格参数和晶格畸变的估计

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-4am5dm

Nataliia Rozhenko, Liubov Ovsiannikova, Valery Kartuzov

引用次数: 0

Thermal Misfit and Diffusion Induced Stresses of Cu-Al Intermetallics in Microelectronics Wire Bonding 微电子导线键合中铜铝金属间化合物的热错位和扩散诱导应力

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-bdlco4

Sharir Shariza, T. Anand

引用次数: 0

Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts 应用 CALPHAD 方法预测过渡金属熔体的非晶化浓度范围

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-lvl7lu

P. Agraval, M. Turchanin, L. Dreval, A. Vodopyanova

{"title":"Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts","authors":"P. Agraval, M. Turchanin, L. Dreval, A. Vodopyanova","doi":"10.4028/p-lvl7lu","DOIUrl":"https://doi.org/10.4028/p-lvl7lu","url":null,"abstract":"Early, the efficiency of the CALPHAD (Calculation of Phase Diagrams) method to a targeted search for compositions of amorphous alloys has been shown. The method for predicting the ranges of amorphization is based on the calculation of diagrams of metastable phase transformations between supercooled melts and boundary solid solutions on the base of pure elements. In this work, the model parameters for thermodynamic properties of liquid alloys and boundary solid solutions were summarized in a self-consistent database for the multicomponent Cu–Fe–Ni–Ti–Zr–Hf system. Such database for the multicomponent system is based on a common set of model parameters for boundary binary and ternary systems. This database was used to predict the concentration ranges of amorphization for the quinary Cu–Fe–Ni–Ti–Zr, Cu–Fe–Ni–Ti–Hf and boundary ternary and quaternary systems. The results of calculations are presented along sections in quaternary and quinary systems. The ternary and quaternary equiatomic alloys along with high entropy CuFeNiTiZr and CuFeNiTiHf alloys are trapped into prognosed composition ranges of amorphization. Predicted composition space of amorphization for melts of the Fe–Ni–Ti–Zr system is shown on the concentration tetrahedron. Based on the obtained results, a new criterion for predicting the concentration regions of amorphization of multicomponent melts is proposed, according to which the presence of a sufficient content of metals that are electron acceptors and donors is a chemical factor that affects the thermodynamic stability of melts and determines their glass-forming ability. For multicomponent melts of the Cu–Fe–Ni–Ti–Zr–Hf system the concentration ranges of amorphization correspond to the simultaneous fulfillment of the conditions xFe + xNi + xCu > 0.25 and xTi + xZr + xHf > 0.15, where Fe, Ni, and Cu are electron acceptors and Ti, Zr, and Hf are electron donors.","PeriodicalId":508865,"journal":{"name":"Defect and Diffusion Forum","volume":"5 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139859169","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

Radiative MHD Boundary Layer Flow and Heat Transfer Characteristics of Fe-Casson Base Nanofluid over Stretching/Shrinking Surface 拉伸/收缩表面上 Fe-Casson Base 纳米流体的辐射 MHD 边界层流动和传热特性

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-ha0zud

M. A. Memon, Kavikumar Jacob, H. B. Lanjwani, A. Obalalu, D. Nagarajan

{"title":"Radiative MHD Boundary Layer Flow and Heat Transfer Characteristics of Fe-Casson Base Nanofluid over Stretching/Shrinking Surface","authors":"M. A. Memon, Kavikumar Jacob, H. B. Lanjwani, A. Obalalu, D. Nagarajan","doi":"10.4028/p-ha0zud","DOIUrl":"https://doi.org/10.4028/p-ha0zud","url":null,"abstract":"In this paper, there is considered MHD boundary layer flow and heat transfer characteristics of Fe-Casson base nanofluid over an exponentially stretching/shrinking surface along the heat source/sink and Newtonian heating effects. In this regard, to develop the system of the governing equations, the one phase model named as Tiwari and Das model is considered with iron nanoparticles. The non-linear governing PDEs are first changed into the system of ODEs using suitable similarity transformations. Later on, the equations are solved numerically by using bvp4c in Matlab software. Effects of certain physical parameters on skin friction coefficient and the local Nusselt number are illustrated graphically. Moreover, the velocity and temperature profiles are examined to observe the influence of various physical parameters such as, Casson, magnetic, suction, radiation, Newtonian heating, heat source/sink and the nanoparticles volume fractions. It is seen that an increase in Casson, magnetic, suction and the nanoparticle volume fractions decrease the velocity profiles for both shrinking and shrinking cases of surface. The temperature profile recedes due to augmentation of Prandlt number and the suction parameter for both stretching/shrinking case while increases with increase in Magnetic, radiation and nanoparticles volume fractions.","PeriodicalId":508865,"journal":{"name":"Defect and Diffusion Forum","volume":"12 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860765","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

Materials Properties and Protection 材料特性和保护

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/b-ig7ktr

Oleksandr Vasiliev, Paulo Mendonça, Soon Hyung Hong, A. Sutjipto, A. D. Pramata

引用次数: 0

Investigation of Austempering Effect on Fatigue Crack Growth of AISI 4140 Steel 奥氏体化对 AISI 4140 钢疲劳裂纹生长影响的研究

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-5jjqqo

M. Badaruddin, Reza Annisa Ainnayah, Rizqy Nurully Wijaya, Slamet Sumardi

{"title":"Investigation of Austempering Effect on Fatigue Crack Growth of AISI 4140 Steel","authors":"M. Badaruddin, Reza Annisa Ainnayah, Rizqy Nurully Wijaya, Slamet Sumardi","doi":"10.4028/p-5jjqqo","DOIUrl":"https://doi.org/10.4028/p-5jjqqo","url":null,"abstract":"The compact tension (CT) and tensile specimens of the AISI 4140 steel in cold rolling condition (untreated steel) were austempered by immersing it into the salt bath at 362°C for 60 minutes. The tensile strength properties and the fatigue crack growth (FCG) resistance were performed to investigate the effect of the austempering process in AISI 4140 steel. A significant increase in the yield strength for austempered steel is about 8.7 % and the elastic strain energy increases by 55.7 %. Austempered steel's fatigue crack cycle is longer than that of untreated steel. Data of stress intensity factor range (ΔK, MPa.m1/2) and FCG rate (da/dN, m/cycle) was constructed in double log plot x-y axes for determining the materials constants m and C according to Paris’s law equation using a linear regression method. From the curve of ΔK versus da/dN, the constant m value for austempered steel (m = 3.45) shows better resistance than untreated steel (m = 3.77). On the other hand, the constant C value of 1.409×10-12 for austempered steel is one order magnitude higher than that of untreated steel (C = 4.151×10-13). The resistance of austempered steel against fatigue crack growth can be attributed to the formation of a bainite structure.","PeriodicalId":508865,"journal":{"name":"Defect and Diffusion Forum","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801106","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

Comparative Analysis of Structural Reinforcement with Viscoelastic Energy Dissipators, Friction and Metal Creep in Tall Buildings 高层建筑结构加固与粘弹性消能材料、摩擦和金属蠕变的对比分析

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-4btbzq

Eddie J. Lipa, Jhon O. Pomasoncco, Joan R. Casas, R. Delgadillo

{"title":"Comparative Analysis of Structural Reinforcement with Viscoelastic Energy Dissipators, Friction and Metal Creep in Tall Buildings","authors":"Eddie J. Lipa, Jhon O. Pomasoncco, Joan R. Casas, R. Delgadillo","doi":"10.4028/p-4btbzq","DOIUrl":"https://doi.org/10.4028/p-4btbzq","url":null,"abstract":"Seismic risk is a challenging problem in tall buildings due to the possibility of loss of human life and economic caused by seismic events. Peru is located at the interaction of the South American plate and the Nazca plate, which is why various seismic events of moderate to large magnitude occur. Today there are many ways to solve these problems and it is a very challenging case to reinforce tall buildings. In addition, technological advances in software facilitate and help through programmed models in tall buildings that analyze their structure characteristics such as drift, shear and others. This article proposes a comparative analysis of three types of dissipators: viscous fluid, friction, and metal creep through a Time-History analysis in a 15-story high-rise building located in Peru. The proposed methodology considers three stages: (i) definition of the characteristics and properties of the structure in accordance with Peruvian Standard E.030, in addition three accelerograms are used for the dynamic time-history analysis and maximum displacements and drifts are determined by ETABS software. (ii) calculate the design drift of the tall building and the properties of the viscous fluid, friction, and creep dissipator. In addition, calculations are made for the design parameters of each dissipator, and it is modeled as required for the case study. (iii) the new drifts and the damping values that the building presents for each dissipator are analyzed. According to the results obtained, the dissipator with the best results is of the flow type, since it has better performance in drifts and manages to produce an average damping of 96.87% for tall buildings. While the viscous dissipators obtain a 57.85% damping and the friction ones are estimated at 81.57%.","PeriodicalId":508865,"journal":{"name":"Defect and Diffusion Forum","volume":"274 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139858604","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

Important of Slip Effects in Non-Newtonian Nanofluid Flow with Heat Generation for Enhanced Heat Transfer Devices 非牛顿纳米流体流动中的滑动效应与热量生成对增强型传热设备的重要性

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-baacr1

Olayinka Akeem Oladapo, A. Akindele, A. Obalalu, O. Ajala

{"title":"Important of Slip Effects in Non-Newtonian Nanofluid Flow with Heat Generation for Enhanced Heat Transfer Devices","authors":"Olayinka Akeem Oladapo, A. Akindele, A. Obalalu, O. Ajala","doi":"10.4028/p-baacr1","DOIUrl":"https://doi.org/10.4028/p-baacr1","url":null,"abstract":"In various fields such as engineering, nanotechnology, and biomedical sciences, the study of non-Newtonian nanofluid flow with heat generation is becoming increasingly important. However, it is challenging to accurately model such flows due to their complex behavior and slip effects at the fluid-solid interface. This research investigates the impact of first and second-order slip conditions on the flow and heat transfer properties of a non-Newtonian nanofluid using a power law model to describe the fluid's non-Newtonian behavior and numerical methods to solve the resulting equations. To determine the influence of various parameters such as slip parameters, Brinkman number, power law index, and Eckert number on the velocity, temperature, and concentration profiles, which this study examines. The study shows that slip parameters significantly determine the flow and heat transfer properties of non-Newtonian nanofluids, the study also reveals that slip parameters are a crucial factor in understanding the flow and heat transfer characteristics of nanofluids, with the second-order slip condition having a greater impact on velocity and temperature profiles than the first-order slip condition. These findings are valuable for developing and optimizing heat transfer devices that involve non-Newtonian nanofluids with heat generation, which is essential for technological advancements in today's industry.","PeriodicalId":508865,"journal":{"name":"Defect and Diffusion Forum","volume":"6 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139859265","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

Nanocrystallization Behaviour of Amorphous Co67Fe4Cr7Si8B14 Alloy 非晶 Co67Fe4Cr7Si8B14 合金的纳米结晶行为

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-o8w6nq

Y. Nykyruy, S. Mudry, Yu. Kulyk, I. Shtablavyi

引用次数: 0

Nanocrystallization Behaviour of Amorphous Co67Fe4Cr7Si8B14 Alloy 非晶 Co67Fe4Cr7Si8B14 合金的纳米结晶行为

Defect and Diffusion Forum Pub Date : 2024-02-06 DOI: 10.4028/p-o8w6nq

Y. Nykyruy, S. Mudry, Yu. Kulyk, I. Shtablavyi

引用次数: 0