International Journal of Materials Science and Applications

Volume 4, Issue 3, May 2015

  • Numerical and Response Surface Interactions for Optimizing Extrusion Parameters

    Gundu David Terfa, Tuleun Livinus Tyovenda, Agber Jonathan Uhaa

    Issue: Volume 4, Issue 3, May 2015
    Pages: 143-148
    Received: 24 March 2015
    Accepted: 08 April 2015
    Published: 21 April 2015
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    Abstract: An experimental program was undertaken to extrude a lead alloy on ELECompact-1500 compression machine. Extrusion variables were extrude diameter (d), die bearing length (h), and included die entrant angle Ө = 90o. Using experimental values, numerical models were obtained to describe the relationship between extrusion variables and extrusion pressur... Show More
  • Application of Multi-Criteria Decision Making Optimization Tool for Determining Mild Steel Weld Properties and Process Parameters Using the TOPSIS

    Joseph Achebo, Monday Omoregie

    Issue: Volume 4, Issue 3, May 2015
    Pages: 149-158
    Received: 08 February 2015
    Accepted: 24 March 2015
    Published: 24 April 2015
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    Abstract: Several different processes and models have been adopted for the optimization of weld deposit quality of mild steel joints. These various processes and models have been used continually over the decades to find new ways of improving weld deposit quality, with the ultimate aim of improving the service life of the resulting weld joints. This quest to... Show More
  • Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method

    Abdur Razzaque Sarker

    Issue: Volume 4, Issue 3, May 2015
    Pages: 159-164
    Received: 28 March 2015
    Accepted: 15 April 2015
    Published: 24 April 2015
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    Abstract: Lanthanum cobaltite (LaCoO3) crystalline material is a promising material for its interesting electrical, magnetic, catalytic and thermoelectric properties. In this study, LaCoO3 powders were synthesized by water based sol-gel method using metal nitrates as precursors and citric acid as the chelating agent at room temperature. The dried powders wer... Show More
  • Investigation of Wettability of Lead Free-Solder on Bare Copper and Organic Solder Preservatives Surface Finishes

    Gabriel Takyi, Peter Kojo Bernasko

    Issue: Volume 4, Issue 3, May 2015
    Pages: 165-172
    Received: 08 April 2015
    Accepted: 20 April 2015
    Published: 30 April 2015
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    Abstract: Wettability plays an important role in the integrity of solder joints especially in critical safety operations. It helps in attaining successful soldering and reliable solder joints. The angle of wettability determines the degree of solder contact and strength of the solder joint. Moreover, the contact angle between the solid substrate and the molt... Show More
  • The Life Predicting Calculations Based on Conventional Material Constants from Short Crack to Long Crack Growth Process

    Yangui Yu

    Issue: Volume 4, Issue 3, May 2015
    Pages: 173-188
    Received: 15 March 2015
    Accepted: 22 April 2015
    Published: 04 May 2015
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    Abstract: To use the theoretical approach, to adopt the multiplication-method of two-parameters, by means of the traditional and the modern material constants, thereby to establish some of new calculation models in all crack growth process. In which are the equations of the driving forces, the crack-growth-rate-linking-equation in whole process, and the life... Show More
  • Effect of Chemical Treatments on the Physicochemical and Tensile Properties of Cow Hair Fibre for Low Load Bearing Composites Development

    Isiaka Oluwole Oladele, Jimmy Lolu Olajide, Adekunle Sulaiman Ogunbadejo

    Issue: Volume 4, Issue 3, May 2015
    Pages: 189-197
    Received: 27 April 2015
    Accepted: 05 May 2015
    Published: 15 May 2015
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    Abstract: This research has investigated the influence of H2O2, KOH and NaOH treatments on the physicochemical and tensile properties of cow hair fibres for composites applications. The chemical treatments for this present study were prepared with predetermined molar concentrations of 0.10, 0.15 and 0.2 M respectively. The physicochemical properties of the c... Show More
  • Optimum Composition for High Strength Aluminium Flux Using the Gauss-Jordan Row Operation Model

    Joseph Achebo, Monday Omoregie

    Issue: Volume 4, Issue 3, May 2015
    Pages: 198-202
    Received: 08 February 2015
    Accepted: 23 March 2015
    Published: 14 May 2015
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    Abstract: Globally, aluminium and its alloys are generally regarded as materials that are difficult to weld. Research is ongoing with a view to finding newer and better ways to repair or weld these alloys. Consequently various mathematical models are currently being adapted to formulate new compositions for aluminium welding fluxes. In this study, a new flux... Show More
  • Modeling of Conventional Autoclave Curing of Unsaturated Polyester Based Composite Materials as Production Process Guide

    Adefemi Adeodu, Christopher Anyaeche, Oluleke Oluwole, Samuel Afolabi

    Issue: Volume 4, Issue 3, May 2015
    Pages: 203-208
    Received: 01 June 2014
    Accepted: 01 July 2014
    Published: 26 May 2015
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    Abstract: Modeling of composite curing process is required prior to composite production as this would help in establishing correct production parameters thereby eliminating costly trial and error runs. Determining curing profile temperatures from experiment is a huge challenge which in itself is like re-inventing the wheel of trial and error, when mathemati... Show More
  • Effect of Die Bearing Parameters on Corrosion Response of Extruded Al-Zn-Mg Alloy

    Injor Oryina Mbaadega, Adewuyi Benjamin Omotayo, Gundu David Terfa

    Issue: Volume 4, Issue 3, May 2015
    Pages: 209-212
    Received: 05 May 2015
    Accepted: 11 May 2015
    Published: 27 May 2015
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    Abstract: In this paper, the effect of die bearing parameters (die bearing length and die reduction ratio) on corrosion response of extruded Al-Zn-Mg alloy was investigated. The alloy was target material for production of automobile bumper beams. Medium carbon steel dies with entry angles of 750, 900, 1050, 1200, 1500 and reduction ratios of 0.21, 0.40, 0.48... Show More
  • The Role of Sulphate Reducing Bacteria in the Deterrioration of Oil Facilities; An Engineering Insight

    Iweriolor Sunday, Emereje Peter

    Issue: Volume 4, Issue 3, May 2015
    Pages: 213-218
    Received: 02 February 2015
    Accepted: 29 April 2015
    Published: 27 May 2015
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    Abstract: The paper describes an advanced approach in the analysis and control of corrosion resulting from the activities of sulphate reducing bacteria as well as the reacting species in the development of the biofilm. An anaerobic Cultured medium was prepared and the pH read on a scale was 7.4 and medium after incubation was dispensed into five anaerobic ex... Show More
  • Application of CaO from Psammotaea elongata Shell as Catalyst in Conversion the Beef Tallow to Biodiesel

    I. Wayan Sutapa, A. Bandjar, Rosmawaty, M. Sitaniapessy

    Issue: Volume 4, Issue 3, May 2015
    Pages: 219-224
    Received: 06 May 2015
    Accepted: 18 May 2015
    Published: 28 May 2015
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    Abstract: Synthesis of biodiesel from the beef tallow using catalyst from Psammotaea elongata shell with methanol as a solvent was carried out. Synthesis the biodiesel was prepared in two steps, there are esterification and transesterification. In esterification was conducted in mole ratio of oil and methanol were 1: 9, with H2SO4 as a catalyst. Transesterif... Show More