Introduction
This program will provide an integrated practical overview of metals and alloys and relating it to the mechanical and physical characteristics of metals; starting from materials testing and physical/mechanical properties, through corrosion properties and strength/deformation principals, and to ferrous and non ferrous alloys and heat treatment.
The course will then include ferrous alloys (plain and alloy steels, Stainless steels and cast irons) and non ferrous alloys (for corrosion and high temperature applications, such as nickel, cobalt and titanium based alloys). The nature of hot and cold working of metals and heat treatment, including annealing, normalising, tempering and case hardening will be explained.
The fundamentals of corrosion and corrosion prevention will also be presented in practical terms with examples to illustrate the key points.
The behaviour of metals under various loading conditions (static, dynamic, fracture) will be presented and related to design methodology and procedures; rules of thumb, standards, and best industry practices.
Each of the major topics will be presented as individual units, and in the context of the overall usage of metal components and structures and failure mechanisms, and mechanical integrity.
Objectives
Upon completion of this course, participants will have gained an understanding of the important principals of engineering involving properties and characteristics of metals and alloys, including fabrication and heat treatment of commercial steels and non-ferrous alloys.
Participants will acquire sufficient knowledge and skills to independently evaluate possible metallurgical and design solutions, to recognise crucial metallurgical phenomena and intelligently discuss their metal problems with design engineers, metallurgists and fabricators.
Content
Day 1 – Testing and Mechanical Properties of Metals
- Tensile tests
- Impact tests
- Hardness tests
- Compression of mechanical properties
The Crystalline Structure of Metals
- Bonding in metals
- Solidification crystal growth and structures of metals
- Defects in metals during solidification
Day 2 – Specimen Preparation and Microscopic Examination
- The preparation (Mounting Grinding, Polishing and Etching) of metal specimens
- Metallurgical and Electron Microscopes
Dislocations and Strengthening Mechanisms in Metals
- Edge Dislocation (line imperfections) in crystals
- Strengthening of metals by Grain Size Reduction, Solid Solution and Strain Hardening
- Softening of metals by annealing
- Comparison of Cold and Hot working of Metals
Day 3 – Binary Equilibrium Diagrams
- Solubility and cooling curves
- Thermal Equilibrium Diagrams (Eutectic Type, Solid Solution Type and Combination Type)
Ferrous Alloys
Definitions and classifications and some uses of ferrous alloys including;
- Carbon steels
- Alloy steels
- Stainless steels
- Cast irons
Fabrication of Metals
A selection of metal fabrication methods, including;
- Forming
- Casting
- Welding
Day 4 – Heat Treatment of Plain Carbon Steel
- Hardening of carbon steel (by quenching)
- Annealing
- Normalising
- Tempering
- Austempering
- Surface treatments
- Heat affected zone (HAZ) in welding
Non-Ferrous Alloys
- Nickel and cobalt
- Titanium alloys
Day 5 – Corrosion in Metals
- The electrochemical cell
- Types of electrochemical corrosion
- Pitting
- Crevice
- Stress corrosion
- Hydrogen induced, etc.
Protection against Electrochemical Corrosion and Inspection
- Coatings
- Internal
- External
- Polymers
- Galvanizing, etc.
- Inhibitors, Types and usage
- Cathodic protection, Impressed current, Sacrificial
- Inspection
- Standards
