What you will learn
Interpret stress-strain behaviour; distinguish ductile, brittle, fatigue and creep damage; identify common corrosion mechanisms; protect and document failure evidence.
Course syllabus
- 1. Structure and properties
Why material selection begins below the surface
- 2. Time-dependent damage
Fatigue, creep, fracture and stress concentration
- 3. Corrosion and investigation
Corrosion mechanisms, NDT and disciplined root cause
Free lesson · 34m
Why material selection begins below the surface
Material behaviour comes from composition, atomic bonding, microstructure, processing and service environment. Metals, polymers, ceramics and composites balance strength, stiffness, toughness, temperature capability, corrosion resistance, manufacturability and cost differently.
Stress is force divided by original area and strain is relative deformation. The stress-strain curve reveals elastic response, yield, plastic deformation and fracture behaviour. Strength is not toughness: a strong material may absorb little energy before brittle failure.
Material grade alone is not the complete specification. Heat treatment, weld procedure, surface condition, thickness, loading direction and operating temperature can change performance.
Structure and processing control properties; distinguish strength, stiffness and toughness; read elastic and plastic regions; specify service condition as well as grade.