Advances in Materials

Volume 8, Issue 3, September 2019

  • Coarse Aggregate Size Effect on Non-linear and Uncertainty Mechanical Behaviors for Concrete

    Ping Liu

    Issue: Volume 8, Issue 3, September 2019
    Pages: 100-107
    Received: 9 April 2019
    Published: 19 July 2019
    Abstract: A series of uniaxial compression tests and simulations were conducted to evaluate the influences of single coarse aggregate (CA) size on the mechanical properties of concrete and their uncertainties. In this research, the specimens of pure mortar matrix and specimens with diameter 15 mm and 30 mm of single spherical steel aggregate were fabricated ... Show More
  • Simulation and Experimental Test in Tensile Behaviour of Austenitic Stainless Steels

    Pham Quang, Trinh Huu Toan

    Issue: Volume 8, Issue 3, September 2019
    Pages: 108-111
    Received: 5 June 2019
    Accepted: 18 July 2019
    Published: 31 July 2019
    Abstract: In the systems of fuel cell (FC) and nuclear safety (NS) components many liners of ultra-high pressure tanks and pipes are directly exposed to hydrogen. Austenitic stainless steels are used as material for FC and NS components because of their high resistance to hydrogen intrusion. It is reported that hydrogen degrades mechanical properties of meta... Show More
  • Nickel Oxide Nanocrystalline Fabricated Under Gamma Irradiation and Its Photocatalytic Investigation for Textile Azo Dye Degradation

    Ekoko Bakambo Gracien, Muswema Lunguya Jérémie, Lobo Kanza-Kanza Joseph, Mvele Muamba Omer, Nzazi Kambamba Nicole, Nduku Mafwa Fabrice, Musengele Bilasi Denis, Ndonganzadi Tresor, Mukiatom Perbon, Mata Niasa Gérard

    Issue: Volume 8, Issue 3, September 2019
    Pages: 112-119
    Received: 4 July 2019
    Accepted: 25 July 2019
    Published: 13 August 2019
    Abstract: Gamma irradiation technique has been applied to produce non-stoichiometric nickel oxide nanoparticles (of approximately 23 nm) from gels prepared at pH about 8.2. Characterization techniques so far discussed in this investigation revealed that the sol product prepared before irradiation corresponded to Ni(OH)2, which was transformed under gamma irr... Show More
  • Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C

    Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao

    Issue: Volume 8, Issue 3, September 2019
    Pages: 120-126
    Received: 7 August 2019
    Accepted: 28 August 2019
    Published: 10 September 2019
    Abstract: Hot corrosion behaviors of CoCrFeNiTi0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT0.5 alloy exhibits relatively high corrosion resistance in Na2SO4-25%K2SO4 molten salts. The cr... Show More
  • Study of the Mechanical Behavior of Agbelouve Silty Sand Stabilized with Cement Used as a Roadway Layer in Southern Togo

    Abalo P’kla, Yawovi Mawuénya Xolali Dany Ayité

    Issue: Volume 8, Issue 3, September 2019
    Pages: 127-131
    Received: 17 August 2019
    Accepted: 5 September 2019
    Published: 19 September 2019
    Abstract: Silty or slimy sand stabilized with cement is used as a base or foundation layer when good quality natural materials are not available nearby. However, its mechanical characteristics are far from being mastered. In this paper, mechanical characteristics at different ages of silty sand stabilized with cement at different rates are studied. For this,... Show More
  • Influence of Nitrogen Ion Implantation on the Disc Brake Material of Motor Vehicles Component

    Bangun Pribadi, Emy Mulyani, Tjipto Sujitno

    Issue: Volume 8, Issue 3, September 2019
    Pages: 132-136
    Received: 22 July 2019
    Accepted: 16 September 2019
    Published: 29 September 2019
    Abstract: Weaknesses of local disc brakes are cover several conditions such as low hardness, wear, and corrosion resistance. To improve this weakness, it is necessary to modify the surface properties of the material. The aim of this research is to study the influences of nitrogen ion implantation on the surface properties of a disc brake material. The implan... Show More