answers graded A+ passed
Materials Engineering - ANS ✔The understanding and modification of the structure and
properties of materials to improve the performance and processing of the material, finding new
uses for existing materials, developing better manufacturing for existing materials, and often
specialize in a specific material.
Materials Science - ANS ✔Research and explore new materials and their properties.
American Society for Testing and Materials (ASTM) - ANS ✔Develops material testing standards,
with over 30,000 members worldwide.
MIS, MRS, NACE International - ANS ✔Other organizations for ceramics, plastics, and metals.
Types of Materials - ANS ✔Metals, Ceramics, Polymers, Composites.
Metals - ANS ✔Most common element, have crystalline atomic structure, high material
strength, good conductors of heat and electricity, malleable, inorganic material. Many are found
and mixed with other minerals. Commonly used in alloys.
Natural - ANS ✔Most pure metals are ______.
Crystalline Structures - ANS ✔In these structures, the atoms are arranged close together in a
regular and repeating structure.
, Ore - ANS ✔Mixture of metals and minerals; require processing to purify the metal or remove
unwanted minerals.
Alloy - ANS ✔Metal mixed with one or more elements
Ex:
Brass = Copper + Zinc
Materials Engineers change the properties of these by changing the amount of individual
elements that are used.
Ceramics - ANS ✔Nonmetallic solids made from inorganic materials, made using a process of
mixing, shaping, heating, and cooling, most have a crystalline structure, strong in compression
(keep their shape and strength), high melting temp. (can retain heat well), brittle but resistant
to wear. Are good insulators and do not conduct electricity.
Polymers - ANS ✔Made up of a long chain of small molecules that form a much longer molecule
(often including carbon and hydrogen), organic materials, noncrystalline, ductile, can be natural
or synthetic.
Plastic - ANS ✔Most common type of polymer, made from byproducts of refining petroleum,
lightweight but strong, easy and fairly inexpensive to process, yet have some negative
environmental impacts.
Thermoplastics - ANS ✔Can be heated, reshaped, and cooled several times.
Ex:
PVC Pipe, Plastic Bag, Foam Cups, Legos
Thermosets - ANS ✔Cannot be reshaped when heated; char or burn instead, have strong
chemical bonds.