Cryo-rolling is effectively deformation of materials at liquid nitrogen temperature (LNT) that assists in producing ultra-fine grained microstructures.
Resulting gains can be made in the mechanical properties of the material and in studied cases, it was found that with a 40% thickness reduction through conventional and cryo-rolling techniques and improvement in hardness can be made from 85HRB to 90.8HRB respectively. Continue reading
Corson or Corson bronze is a copper nickel silicon system which maintains the most fundamental advantages of copper alloys i.e. excellent conductivity, whilst providing adequate mechanical and physical properties to be considered for industrial applications.
Significant advancement of these alloys occurred over time and as the grain size and microstructure were adjusted to provide superior property profiles from the Cu–Ni–Si alloys. Continue reading
Coppers range of advantageous characteristics a quite well known including high electrical and thermal conductivity, excellent corrosion resistance to name but a few.
Dispersion strengthened coppers add the advantage of higher strengths which means they can be used for a range or applications such as welding consumables. Continue reading
Bronze alloys exhibit very good toughness, strength, corrosion resistance, electrical conductivity, and thermal conductivity.
As one of the oldest alloyed materials a range of applications exist to take advantage of the various positive characteristics such as high load bearings, bushings and hydraulic cylinder parts. Continue reading
Dispersion strengthening of any material is done with the aim to create a composite of superior physical properties via the dispersion of oxide particles in the metallic matrix.
High energy ball milling provides a repetitive fracture/weld method to achieve a homogeneous dispersoid distribution. Continue reading
Metal matrix composites reinforced with ceramic particles can be interesting for a range of applications due to their strength performance at high temperatures and a relatively low thermal expansion potential.
Manufacturing of Cu-MgO composites critically requires that the raw materials have a very high level of purity (99.5-99.9%) to achieve the desired manufacturing results. Continue reading
The addition of copper in HSLA steels has been found to greatly benefit the strength levels of steels used for among other applications, offshore structures, pipelines and ship hulls.
In combination with copper additions, low carbon content is also essential for attaining the desired effects and during the last three decades, research has also extended to comparing the benefits of hot rolling versus quenching and tempering to make further gains in quality of the material properties.
The benefits of standard HSLA steels mean that materials with good combinations of strength toughness and weldability can be produced, all at a very reasonable cost.
During the early 20th century, experimentation began to see what impact copper would have as an alloying element. The results showed significant further improvement in the overall mechanical properties of the materials including a higher resistance to fatigue crack growth.
Copper has sufficient strength, ductility and hardness for these applications at operating temperatures up to 100°C. For many other applications, however, the demands of electrical technology require copper to have higher mechanical properties and to be capable of use at elevated operating temperatures while still retaining the good conductivity for which it is selected in the first place.
Therefore, a large variety of high copper alloys has been developed, whose properties are equal to or, in some cases, higher than those of many other engineering metals, yet, which have conductivities high enough for electrical applications.