1 of 32

Introduction to Metals

Nature, to be commanded, must be obeyed.�Francis Bacon

​

Lecture Video

2 of 32

Metals

  • Metals are elements that give up electrons to form cations. They tend to be lustrous, conduct electricity, and are malleable and ductile.

3 of 32

Simplified Atomic Model

  • Nucleus
  • Proton
  • Neutron
  • Electron

Note: Don‘t think of the Bohr model as the way the atom actually looks. Treat it like a schematic.

4 of 32

Background Information

  • Periodic table of the elements
  • Understanding Periodicity

See

5 of 32

Alkali Metals

  • Video

6 of 32

Alkali Metals

  • Lithium
  • Sodium
  • Potassium
  • Rubidium
  • Cesium
  • Francium

7 of 32

Alkaline Earth Metals

  • Video

8 of 32

Alkaline Earth Metals

  • Beryllium
  • Magnesium
  • Calcium
  • Strontium
  • Barium
  • Radium

9 of 32

Transition Metals

Wikipedia.org

10 of 32

Post-Transition, “Poor” Metals

  • Aluminum
  • Gallium
  • Indium
  • Tin
  • Thallium
  • Lead
  • Bismuth

Wikipedia.org

11 of 32

Atomic Bonds

  • Ionic

Wikipedia.org

12 of 32

Ionic Bonding Video

13 of 32

Atomic Bonds

  • Covalent

Wikipedia.org

14 of 32

Atomic Bonding

  • Metallic

15 of 32

Metallic Bonding

16 of 32

Crystal Structure of Metals

17 of 32

Unit Cell & Lattice Structures

18 of 32

BCC

19 of 32

FCC

20 of 32

HCP

21 of 32

Mechanical Properties

http://www.grantadesign.com/ashbycharts.htm

22 of 32

Tensile Test

23 of 32

Stress-Strain Diagram

Source: Wikipedia.org

UTS - Ultimate Tensile Strength

​

Yield Point

​

E = Young’s Modulus (modulus of elasticity)

24 of 32

Mechanical Properties

  • Those properties that reveal the reaction, either elastic or plastic, of a metal to an applied stress.
    • Elasticity
    • Elastic Deformation
    • Plastic Deformation
    • Toughness & Hardness

25 of 32

Mechanical Properties

  • Ductility & Malleability
  • Creep Resistance

26 of 32

Physical Properties

  • A physical property is any measurable property the value of which describes a physical system's state.
    • Thermal Properties
      • Melting Point (Liquidus/Solidus)
      • Boiling Point
      • Coefficient of Thermal Expansion
      • Thermal Conductivity
    • Electrical Properties
      • Conductivity/Resistivity
    • Magnetic Properties
      • Ferromagnetic metals (Fe, Ni, Co)
    • Optical Properties
      • Color, luster (lustre)

27 of 32

Density

Reference only.

Not for design.

28 of 32

Chemical Properties

  • A chemical property is any of a material's properties that becomes evident during a chemical reaction
    • Reactivity, Oxidation & Corrosion Resistance, Solubility
    • Most metals and metal oxides are alkaline (bases)
    • Solubility

29 of 32

Metallography Introduction (HW)

30 of 32

A closer look at unit cells

​

31 of 32

Have you ever seen an atom?

32 of 32

https://pubchem.ncbi.nlm.nih.gov/periodic-table/