Sintered Iron Based Materials

Generally there is a huge application of powder metallurgy produced parts, especially in the automotive industry.
The complexity of these parts however can mean that through the presence of pores crack propagation can be a very real problem which needs to be addressed through various alloying and process techniques. 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

Introduction to Additive Manufacturing: Part Three

Additive manufacturing is a relatively recent manufacturing method which has become a key area of interest in multiple industrial sectors.
Some of the most prominent benefits of AM include very low energy consumption, reduced waste, and a reduced time to market, to name but a few. Continue reading

Cryogenic Treatment of Stainless Steels

Cryogenic treatment of stainless steels is just one method that can be used to reduce commonly occurring microstructural defects in stainless steels.
With cryogenic treatment the general strength properties of stainless steels can be improved and with the additional heat treatment, plasticity can also be effectively preserved. Continue reading

High Boron Cast Iron: Part Two

Boride emerged as a good alloying option for iron based alloys to help improve toughness and specifically help in applications where wear resistance is important.
There are many studies available but here we discuss the effect of different tempering temperatures on the microstructure and mechanical properties of high boron white cast iron after air quenching. Continue reading

Adhesive Bonding

One of the earliest and most recognized adopters of adhesives to join metal parts was the aircraft industry who began using the available technologies during World War II.
Nowadays adhesive bonding is a commonly used technique for joining similar and dissimilar materials and whilst if offers great flexibility in design, the mechanics of the joints must be well understood. Continue reading

Iron Spark Plasma Sintering: Part Two

Spark Plasma Sintering (SPS) is a sintering technique which is well matched to mechanically milled materials such as tool steels due to its low temperature and short cycle time.
One of the key objectives using SPS is to increase the density of the sinter in order to attain better overall property profiles of the finished part. 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

Corson Alloys

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

High Boron Cast Iron: Part One

Boride emerged as a good alloying option for iron based alloys to help improve toughness and specifically help in applications where wear resistance is important.
The addition of boron causes martensite transformation to a mixed state with austenite and this provides the platform for improved overall toughness in the material. Continue reading