Cryo-rolling of Cu Alloys: Part One

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

Dynamic Strain Aging in Steel: Part One

Dynamic and static strain aging are the two main methods by which a material is further aged either during or after a period of plastic deformation.
Dynamic strain aging is specifically characterized by a rapid aging process which occurs during the actual straining and is associated with subsequent strength property advancements of the material. Continue reading

Dispersion Strengthened Titanium Alloys

Finley dispersed nano-particles of oxides can be successfully used in the strengthening of titanium alloys due to their hardness, stability and insolubility in the base-metal.
Other dispersoids can also be used such a ceramics but the most important aspect is for them to be thermodynamically stable, homogeneously distributed in the metal matrix and of nanometric size. Continue reading

FASTMET Iron Processing

The FASTMET process was developed in the 90’s by several key industry players to create a more cost effective iron making process to combat rising natural gas prices which fueled more established processing in place since the 60’s.
The FASTMET process is simple and unique and involves rapid heating which in turn accomplishes a rapid reduction reaction. Continue reading

Dispersion Strengthened Copper Alloys: Part Two

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

Thermal Expansion of Stainless Steels: Part One

The coefficient of thermal expansion effectively measures the rate of the material expansion as a function of temperature.
This is a critical measure of the material where the application infers heating and remaining at a fixed dimension for any period of time. Continue reading

Boronization of Titanium Alloys

Boronizing is a surface treatment by which boron atoms are diffused into the surface of the metal in quantities exceeding the solubility limit.
Hardness is improved and thus wear resistance increased as well as a number of other advantages such as corrosion and oxidization resistance. Continue reading

Steel Bending

There are five typical methods of bending currently used in industry today: rolling, incremental bending, hot bending, rotary-draw bending, and induction bending.
Although ISF is generally very slow, it is of interest because no or only a simple and cheap tool is required, making the process ideal for small-series production. Continue reading

The Low Superheat Casting (LSC) Process

Low superheat casting is similar to the better known SSM technique which can be applied primarily to produce billets with a low cost advantage.
In the LSC process, the alloy is rapidly solidified and cast with a low pouring temperature which is typically just above the liquidus temperature. Continue reading

Vacuum Brazing: Part Two

A critical step in any brazing process is the successful removal of oxide films before the process begins and the vacuum brazing process is no different.
In order to prepare the mating surfaces for brazing the ‘clean-up’ process needs to be initiated and this typically happens most effectively between 600 and 850°C. Continue reading