4.1 Properties of materials | IB Design Technology

characteristics of materials that can be identified through non-destructive testing

A measure of how much matter is in an object

A measure of the force of gravity on an object's mass

the quantity of 3-dimensional space within an object

the mass per unit volume of a material

The measure of a material's ability to resist electricity, measure of opposition to the flow of current. (i.e. low resistivity materials will conduct electricity well)

a measure of how fast heat is conducted through a slab of material

a measure of the degree of increase in dimensions (length, area or volume) when an object is heated

a material's resistance to penetration or scratching

a material's ability to withstand pulling forces

a material's ability to withstand being pressure.

the ability of a substance to be extruded into a wire

a material's resistance to deflection by applied force

A material's ability to absorb energy, can't be fractured, ripped or torn. example: super alloy - high thermal resistivity

a material's ability to be changed in shape permanently

ability of a material to return to its original shape after some form of deformation.

a measure of the stiffness of an elastic modulus

force / cross-sectional area (force per unit area by applying tensile force)

extension / stretched length (force per unit length after tensile force is applied)

features related to the appreciation of beauty of form- taste, smell, appearance, texture

photo-chromicity, thermo chromic, thermoelectricity, magneto-rheostatic, electo-rheostatic, piezo electricity, shape memory333

a material that has reversible change of colour when exposed to light

Electricity generated by heat and differences of temperature in materials,

fluid which can experience dramatic change in their viscosity

pressure from deformation gives off small electrical discharge

metals that exhibit pseudo-elasticity and shape memory due to rearrangement of molecules in the material without temperature change