Research Papers/Topics in Materials and Metallurgical Engineering

Effect Of Heat Treatment On Corrosion Of Mild Steel Weld Metal In Cassava Juice ~

INTRODUCTION In west African and other tropical countries cassava tubers are a source of major staple foods. They are also used in the .manufacture of ethyl alcohol and the production of starch used as a binder in tablet making and as an animal feed, and are being proposed for use as an addition to wheat flour for bread making. Corrosion of mild steel machinery, storage facilities, and agricultural implements used in processing cassava roots has been widely reported by the processing industr...

Effect Of Thermomechanical Working On The Strengthening Of Some Austenitic Steel Grades

ABSTRACT This work studied the effects of degrees of warm-split rolling at different temperatures on the strengths of three different grades of austenitic steels (chrome–manganese, chrome–manganese with Ni and Mo additions, chrome–nickel with Mn and Mo additions). The results were compared with cold-rolling effects on the steel grades. The tensile, hardness and impact strengths of the rolled products were obtained. The results showed that thermomechanical working remarkably influenced t...

Working Properties Of Some Selected Refractory Clay Deposits In South Western Nigeria

ABSTRACT Working properties of some clay deposits in Ekiti State, Nigeria were investigated with a view to determine their suitability for use as refractory bricks. The samples were collected from three different commercial pottery clay centers in Ekiti State; they are Ara, Awo and Isan. Two varieties were collected from both Ara and Isan, which are named Ara 1, Ara 2, and Isan 1, Isan 2 respectively while only one type was collected from Awo. The clay samples were crushed, pulverized, sieve...

A Study of Processing Parameters on the Carburization of C2R Steels

ABSTRACT This study reports an investigation of the effect of carburizing variables - temperature, time and percentage of energizer --on the case properties of C2R steel obtained from HMT Ltd. India. A carburizer consisting of hardwood charcoal and coke respectively in the ratio of 2: 1 was used for the research with sodium carbonate as the energizer. The carburizing box was filled with 20 mm thick carburizer compound prior to fixing the steel samples in place. The specimens were carburized ...

THE ROLE OF FORGING DURING INERTIA FRICTION WELDING OF NICKEL BASE SUPER ALLOY RR1000

ABSTRACT The dissolution response of y phase to thermal and mechanical effects in an inertia friction welded turbine disk nickel base super alloy RR1000 has been investigated.

THE EFFECTS OF A5TB REFINER ON THE FATIGUE STRENGTH OF 6063AL ALLOY

ABSTRACT The study focuses on the influence of aluminium titanium boron (A5TB) master alloy on the fatigue behaviour of 6063al alloy.

TMAZ MICROCRACKING IN INERTIA FRICTION WELDING OF PM RR1000 SUPERALLOY: CONCOMITANT EFFECT OF CONSTITUTIONAL LIQUATING PARTICLES

ABSTRACT The effect of constitutional liquation of strengthening particles in PM RR1000 superalloy in response to inerta friction welding process was investigated.

Effect of Degree of Deformation on the Mechanical Properties of High Temperature Thermomechanically Treated Steel

ABSTRACT The development of high strength materials, coupled with good formability has always been the aim of material scientists.

EFFECT OF HEAT TREATMENT ON THE DAMAGE RATIO OF CORRODED ST 60. MN STEEL

ABSTRACT In this work, the effect of various heat treatments on ST 60Mn steel on its fatigue strength prior to use and after use was studied it was observed that by normalising for service conditions not exceeding 10 stress cycle, the fatigue strength was raised by a factor of 1 2.

Adaptation of Ushafa clay, Abuja, as a suitable replacement for bentonite in the foundry industry

ABSTRACT This work investigated the possible use of Ushafa clay in Abuja, Nigeria as a suitable replacement for bentonite clay in foundry use. Moulding sand mixes with compositions of 8,10 and 13 % Ushafa clay, silica sand and 5, 7,8,9,10 and 11 % coal dust additives were mulled. From each mix, cylindrical specimens were prepared and subjected to permeability, shatter index, compression and shear strength tests. The results from the Ushafa mix were compared with results from Bentonite mixes....

Microstructural Study of Heat Treated Chromium Alloyed Grey Cast Iron

ABSTRACT This work investigated the effect of annealing, normalizing and quenching heat treatments on the microstructure of some chromium alloyed grey cast iron. Three sets of ten samples each having chromium contents of 0.5, 1.5 and 2.5% were heat treated above the upper critical temperature, to austenitizing temperatures (800oC, 850oC, 900oC) for one hour each and then annealed, normalized and water quenched. Metallographic analyses of the heat treated samples were done. The results showed ...