: Resistance to localized plastic deformation (e.g., indentation). Common scales include Rockwell and Brinell. Ductility : How much a metal can stretch before it snaps.
: Techniques include alloying (e.g., adding Chromium for Stainless Steel), coating (galvanizing), or cathodic protection. Summary Table: Processing vs. Structure Process Step Microstructural Effect Resulting Property Change Cold Working Increases dislocation density Higher strength, lower ductility (Strain Hardening) Full Anneal Coarse grain growth Maximum softness and ductility Quenching Forms Martensite (BCT structure) Extreme hardness, high brittleness Alloying Solid solution strengthening Increased resistance to deformation Metallurgy and its Extraction - Longdom Publishing
: Valued for high strength-to-weight ratios in aerospace. Engineering Metallurgy - Applied Physical Metal...
: Specific temperatures where a liquid transforms into two solids, or one solid transforms into two different solids. 3. Heat Treatment of Steels
The journey begins at the atomic level, where the arrangement of atoms defines a material's fundamental nature. : Resistance to localized plastic deformation (e
Pure metals are rarely used in engineering; instead, we create to enhance properties.
: Rapid cooling (often in water or oil) to "trap" atoms in a high-strength, brittle state called Martensite . : Techniques include alloying (e
: These are "maps" showing what phases (solid or liquid) exist at specific temperatures and compositions.