mmme2045 lecture 1

uni/mmme/2xxx/2045_materials_in_design/materials_in_design.md

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+---
+author: Akbar Rahman
+date: \today
+title: MMME2045 // Materials in Design
+tags: [ uni, mmme2045, materials ]
+uuid: eb10418c-4bfa-4b3f-941b-cbc53e3d5eee
+---
+
+# Material Selection
+
+# Terminology
+
+- Light alloys --- metals with densities of less than 4.5 gcm$^{-1}$ and typically less than 3
+                   characterised by higher strength to weight ratio than typical steel alloys
+- Cast --- as-cast condition. Cooling rate and grain refiners are key to improve strength and toughness
+- Wrought --- (rolled, extruded, forged) Properties rely on appropriate heat treatment or working
+              such as precipitation hardening or work hardening
+