Intro Flashcards
Example of “materials nan limited design, with new processes and materials comes Nero opportunities but also new problems.”
Plastics lead to time release drugs, contacts, pep but it is also found as micro plastics in humans
Material science
Study of the relationship between structure and property in materials
How are materials engineers and mechanical engineer related
Materials take knowledge from materials scientist to create materials with specific properties
Mechanical desire performance from design, they select materials and processes based on data from materials engineers
How are the properties and structure of materials related
Materials →← processing → structure → properties → performance
Levels of material structure
Microstructure → crystal/molecular structure (atomic arrangement) → atomic structure → subatomic particle (proton, photon, electron, phones )
What is the micro structure of a material
The high level arrangerent of the structure,
Easy to manipulate→ GB discontinuities, second phase, impunities
Most impactful change to structure
How does heat treatment effect structure of a material
It changes / controls the microstructure
What properties does a change in structure effect
Physical (density), electrical, magnetic, thermal, optical
All levels of structure change effects these properties, some more them others
Forging process
Choice of steel + additional material → forging, shaping, folding → annealing → sharpening I hardening (quenching tempering)
What is annealing
Heating up a material at a pre-set temp for a pre-set time
What is a crystalline material
Crystalline → long-range order, typically structural metals or structural ceramics
What are non-crystatalline materials
Amorphous, no long range order, glasses, polymers, ceramics
(T/f) unit cells and lattice basis are native to the material
T
Ex of FCC
Cu
Al
Ni
Gamma-fe
Ex of bcc
Alpha-fe
Beta-ti
