Forthcoming and Online First Articles

International Journal of Microstructure and Materials Properties

International Journal of Microstructure and Materials Properties (IJMMP)

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International Journal of Microstructure and Materials Properties (7 papers in press)

Regular Issues

  • Effects of lubrication on shearing process of electrical silicon steels   Order a copy of this article
    by Yiwei ZHU, Qiusheng YAN, Jiabin LU, Biao TANG 
    Abstract: In order to improve the shearing section quality of electrical silicon steels, the shearing force and section quality of oblique-shearing electrical silicon steels were studied under the states of no lubrication, liquid lubrication, and solid lubrication. The shearing contact mechanical model of oblique- shearing electrical silicon steels was established to reveal the mechanism of the influence of lubrication on the shearing force in the shearing contact zone. The shearing force, section burr, shear surface rollover, surface hardening and other shearing characteristics were studied by experiments. And the results showed that: compared with dry shearing, with the addition of lubrication, the shearing section appearance and flatness of electrical silicon steels is significantly improved, the rollover and burr height of the shearing section is significantly reduced, the burnish zone height is significantly increased, the maximum shearing force is reduced, the work-hardening capacity is reduced, and the effect of solid lubrication is better than that of liquid lubrication. The analysis showed that during the plate shearing process, the addition of lubrication reduces the friction between the tool and the plate, reduces the plate movement, delays the generation and expansion of cracks, and improves the shearing quality. This study can provide a reference for improving the shearing and machining quality of motor core material.
    Keywords: electrical silicon steel; oblique shear; lubrication; fracture surface; surface integrity.

Special Issue on: Nanocomposite Materials Synthesis, Properties and Applications II

  • Determination of porosity and microstructure studies of wax-based Aluminium metal foam   Order a copy of this article
    by Mahadev Madgule, C.G. Sreenivasa 
    Abstract: Aluminium metal foams nowadays are popularly used because of their unique feature of high stiffness concerning low density in the order of 10-15% of the bulk Aluminium material. In this paper, Aluminium metal foam is developed using the powder metallurgy technique. The elements used in the composition are Aluminium metal powder and a foaming agent as a wax powder (3-9%). The porosity is calculated using the Archimedes principle and achieved a good percentage of porosity in the specimen with a blowing agent as wax powder and achieved maximum porosity of 60.41%. The Microstructure study has been done on the prepared specimens to check the uniform distribution of porosity on the entire specimen and to check if any foreign chemical factor is incorporated. It is found that there is no adequate result in the prepared specimen.
    Keywords: Aluminium metal foam; wax powder; powder metallurgy technique; porosity; microstructure studies.
    DOI: 10.1504/IJMMP.2022.10052228
  • An optimisation of 3D printing parameters of nanocomposites based on improved particle swarm optimisation algorithm   Order a copy of this article
    by Jianing Zhang, Yanhong Yang 
    Abstract: In order to overcome the problems of low accuracy, long optimisation time and high printing error of traditional 3D printing parameter optimisation methods, a optimisation method of 3D printing parameters of nanocomposites based on improved particle swarm optimisation (PSO) algorithm was proposed. The 3D mechanism model of nanocomposites 3D printer was constructed, the kinematics of the model was solved, and the calculation results of 3D printing parameters were obtained. The fundamental PSO algorithm is improved by introducing potential drop and contraction expansion factor. The objective function of 3D printing parameter optimisation was constructed, and the improved PSO algorithm was used to solve the function to realise 3D printing parameter optimisation. The test results show that the calculation accuracy of 3D printing parameters of nanocomposites is always higher than 92%, the average optimisation time is 0.72 s, and the maximum 3D printing error is 0.2 mm.
    Keywords: improved PSO algorithm; nanocomposites; 3D printing parameters; parameter optimisation; contraction expansion factor.
    DOI: 10.1504/IJMMP.2022.10052515
  • High-temperature deformation characteristics of 3D printing of nano-ceramic materials   Order a copy of this article
    by Xiao Zhang 
    Abstract: In order to improve the application effect of three-dimensional printing of nano ceramic materials, the high-temperature deformation characteristics of three-dimensional printing of nano ceramic materials were studied. First, the main raw materials and experimental instruments for preparing nano ceramic materials were selected. Then, high-temperature nano ceramic materials were prepared by using 8%, 12%, and 15% polyester modified silicone resins respectively; And put it into the storage box of the direct writing 3D printer to print the 3D ceramic sample with the 3D printer. At last, the high temperature deformation characteristics under different high temperature environments are analysed. The results show that the adhesive force and salt spray resistance of 12% polyester modified silicone resin 3D ceramic specimens are good, and the bending strength of 12% polyester modified silicone resin 3D ceramic specimen is high, its structural stability is good, and the deformation value is small under the same high temperature environment.
    Keywords: nano-ceramic materials; 3D printing; high-temperature deformation characteristics; densification; bending strength.
    DOI: 10.1504/IJMMP.2022.10052516
  • An influence of composite nano materials on tensile properties of concrete members   Order a copy of this article
    by Weiqiang Chen, Yuanyuan Wang, Yali Li, Yanbiao Ke 
    Abstract: In order to improve the tensile properties and prediction effect of concrete members, this paper studies the influence of composite nanomaterials on the tensile properties of concrete members. Firstly, the concrete members containing composite nanomaterials were prepared, the compressive strength of the concrete members was calculated by compressive mathematical function, the tensile properties of the concrete members were analysed according to the tensile mechanism, and the compressive stress-strain curve of the nanofibre concrete members was obtained. The tensile constitutive function of nanofibre ultra-high performance concrete (UHPC) was constructed to analyse the influence of composite nanomaterials on the tensile properties of concrete members. The experimental results show that the ultimate tensile strength and elastic ultimate tensile strength of concrete members with the proposed method can reach 11.54 MPa and 9.56 MPa, and the prediction accuracy of tensile properties can reach 99%, indicating that the proposed method can improve the tensile properties of concrete members.
    Keywords: compressive mathematical function; ultimate tensile strength; flexural strength; tensile constitutive function; UHPC; ultra-high performance concrete.
    DOI: 10.1504/IJMMP.2022.10052517
  • Study on the high and low temperature performance of nano alumina modified asphalt mixture   Order a copy of this article
    by Wenjia Song 
    Abstract: To improve the high and low temperature performance of asphalt mixture, nano alumina was used as additive in this study. Firstly, the high temperature characteristics of asphalt mixture with different content of nano alumina were studied by rutting test and dynamic creep test. Secondly, the fatigue properties of modified asphalt mixture at different temperature were tested by indirect tensile fatigue test. Finally, the low temperature bending test and indirect tensile test were used to evaluate the low temperature performance. The results show that nano alumina can improve the high temperature and fatigue properties of asphalt mixture to some extent, while the low temperature performance decreases slightly.
    Keywords: road engineering; asphalt mixture; nano alumina; high and low temperature performance; fatigue performance.
    DOI: 10.1504/IJMMP.2022.10052619
  • The biomedical potential of polycaprolactone nanofibrous scaffold containing titanium oxide for wound healing applications   Order a copy of this article
    by Hamzah Hashim Kzar, Saade Abdalkareem Jasim, Sanobar Y. Kurbanova, Hasan S. Al-Ghamdi, Forqan Ali Hussein Al-Khafaji, Moaed Emran Al-Gazally, Acim Heri Iswanto, Surendar Aravindhan, Yasser Fakri Mustafa, Mohammad A. Alghamdi 
    Abstract: Wound dressing is one of the most well-known and challenging issues all over the world. Recently, in the field of biological applications, polymeric scaffold incorporating metal oxide nanoparticles has been extremely important, especially in focusing on wound healing. In this project, we have successfully fabricated nano-fibrous scaffold using the electrospinning method prepared by poly(-caprolactone) (PCL) polymer. Titanium dioxide (TiO2) is incorporated into the PCL solution as a strong antibacterial element and as a tensile strength enhancer. The characterisation of scaffolds was done by transmission electron microscopy (TEM), scanning electron microscopy (SEM), mechanical analysis, and water vapour transmission rate (WVTR), porosity. The nanofibers biocompatibility and capacity for cell attachment were demonstrated by MTT and 4',6-diamidino-2-phenylindole (DAPI) staining. By using the optical density method and coming into direct touch with gram-positive and gram-negative bacteria, the PCL/TiO2 scaffold exhibits antibacterial action. These data suggest that engineered nanocomposite scaffold has a superior potential for wound healing applications which improves elasticity, strength, and antibacterial properties.
    Keywords: nanofibrous scaffold; poly(ε-caprolactone); wound healing; antibacterial activity; titanium dioxide; nanoparticles; elasticity; biocompatibility; cell attachment; engineered nanocomposite.
    DOI: 10.1504/IJMMP.2022.10052620