Amorphous
Constituent particles form a shapeless structure Angstrom x 10-10 m Annealing
A heat treatment method that increases ductility, removes strain hardening & stresses Aspiration
Austenite
Bainite
Bernouillis theorem
Body centred cubic
Brinell
A hardness test method that makes use of a steel ball, normally 10mm diameter Brittleness
Carburising
The diffusion of carbon into the surface of steel to harden it Cementite
Chaplets
Charpy
A toughness test Cleavage
Transcrystalline fracture along crystal boundaries Columnar grains
Covalent
Crystalline
Composed of crystal structure; consistent, ordered structure repeated through the material. Dendrite
Diffusion
The movement of atoms within a solid liquid or gas due to desire to increase entropy Dislocation
A type of defect in crystals whereby the atoms are out of position. Dispersion strengthening
Embryo
Nucleation begins here Enthalpy
Energy change (H) Entropy
Disorder- systems always seek maximum disorder e.g. Two gasses spontaneously mixing Epitaxial
The continued growth of a crystal by atoms attaching themselves to the crystal structure- this creates directional crystal growth Equiaxed
Eutectic
The point on a phase diagram where Face centred cubic
Ferrite
Fluidity
Grain Growth
Highest annealing temp, encourages growth of grains. Decreased strength. Usually undesirable Grain size strengthening
Grey iron
Hardenability
Hardness
The measure of a materials resistance to material indentation or abrasion Heterogeneous nucleation
Takes place with solid imputies in the liquid eg. Container walls or solid particles Heterogeneous
Hexagonal close packed
Homogeneous
A solution that is consistent throughout e.g. air Homogeneous nucleation
Takes place in a liquid without any other impurities or surfaces present Hypoeutectic
Inoculant
Insolubility
e.g. oil and water Intergranular
(fracture) through grain boundaries Interstitial
Small atoms fit in the spaces of a crystal strucure Izod
A toughness test Knoop
A microhardness test that makes use of a small indenter, perfect for thin or brittle materials. Lamellae
Lamellar
Lattice
Liquidus
The upper phase boundary- the point at which materials begin to freeze Malleable
Martensite
Microsegregation
Chemical separation and concentration of alloy elements Microstructure
The structure of a material at the micro scale Near net
Close to the final shape desired Nodular
Nucleation
The first step in forming a crystal Pearlite
Polycrystalline
Polymorphic
Precipitation (age) hardening
Proeutectoid
Recrystallization
Higher annealing than recovery, distorted grains replaced with new strain free ones. Creates fine grain
