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Relationship between fracture topography and fracture toughness of a high strength steel
The relationship between fracture topography and the plane strain fracture toughness of Comsteel En25 tempered at nine different temperatures and with crack planes in the R-L, R-C and L-R orientations has been...
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Article
Fatigue performance of repaired pipeline steel welds
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Article
Mechanical properties of a marine shaft steel with banded ferrite-pearlite structure
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Chapter
Applications of Fracture Mechanics in Residual Stress Measurement of Cold Worked Holes
The displacement between two points across a crack in a body subjected to external forces as the virtual forces approach zero is a function of the stress intensity factor due to the external forces and the to ...
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Chapter
Effects of Cooling Rate on Fracture Toughness
Assab 760 steel standard compact tension specimens of 19mm thickness were austenitised at 850°C and cooled to room temperature using six different cooling mediums, viz., water, oil at room temperature, oil at ...
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Article
On the prediction of tensile properties from hardness tests
The possibility of correlating the hardness to the tensile properties of a material has been investigated using Assab 760 steel, mild steel and API Std 5LX grade X60 pipeline steel that have been heat-treated ...
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Article
Thermal fatigue property of high-density polyethylene
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Article
Recent development in the fabrication of metal matrix-particulate composites using powder metallurgy techniques
It is advantageous to fabricate metal matrix-particulate composites (MMPCs) using powder metallurgy (PM) because the fabricated composites possess a higher dislocation density, a small sub-grain size and limit...
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Article
Measurement of crack-profiles using AC field measurement method
The alternating current field measurement technique has been employed in the present study to predict cracks of different profiles. Profiles used included surface thumb-nail cracks of semi-circular, semi-ellip...
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Article
Microstructure and Growth Mechanism of Al2O3/Al Ceramic Matrix Composite Made by Directed Oxidation of Al Alloys
Since the Lanxide process was advanced for forming of Al2O3 ceramic composite by directed oxidation of Al alloys, much work has been done with various mechanisms being proposed. The mechanisms have claimed that o...
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Article
Effects of gap filler and brazing temperature on fracture and fatigue of wide-gap brazed joints
The influence of gap filler content on the fracture, fatigue crack initiation and propagation of AISI 316 stainless steel wide-gap brazed with nickel-based filler metal has been investigated. The brazed joints...
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Article
Influence of heat treatment on properties of copper-based shape-memory alloy
An investigation was performed on a Cu-Zn-Al ternary alloy to examine the influence of heat treatment on its shape-memory effect. Four heat treatments were carried out, namely, step quenching, ice-water quench...
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Book
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Chapter
Introduction to Mechanical Alloying
Mechanical alloying is a ball milling process where a powder mixture placed in the ball mill is subjected to high energy collision from the balls. The process is usually carried out in an inert atmosphere. It ...
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Characterization of Powders
Size, distribution of size and surface area of powder particles are important parameters in mechanical alloying and milling. They will influence the chemical reaction not only during milling but also post proc...
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Mechanical Properties
A potential application of the mechanical alloying technique is to strengthen a material via extremely fine oxide dispersoids. Oxide dispersion strengthened alloys possess higher creep resistance and greater s...
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Chapter
Experimental Set-up
For mechanical alloying, the powder mixture which may be elemental powder particles or alloying particles, is charged in the container (also known as bowl, vial, or jar) of a ball milling machine (or a ball mi...
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Chapter
Densification
A simple densification method is to use cold compaction to obtain relative high density of the green compacts. Like ordinary powder metallurgy process, higher compaction densities may result in better green st...
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Chapter
Mechanisms of Mechanical Alloying
Unlike conventional processes in which materials are produced either by melting or sintering at high temperature, synthesis of different types of materials using the mechanical alloying or milling process is g...
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Chapter
The Mechanical Alloying Process
The mechanical alloying/milling process is a solid state powder process where the powder particles are subjected to high energetic impact by the balls in a vial. As the powder particles in the vial are continu...
