1. Materials Technology Material Testing

2. Overview – Testing Materials Hardness Testing Direct Reading Hardness Testing Machine (Vickers or Brinell) Measures the materials resistance to indentation or scratching Indenter Test Component Placed on Table Table Height Adjustment Activating lever Hardness Value Read Directly From Dial

3. Overview – Testing Materials Vickers Hardness Testing Measures the materials resistance to indentation or scratching A square pyramid shaped indenter (point angle 136°) is forced into the specimen. The diagonal length of the indented square is measured. This measurement is taken by a special microscope for accuracy. It is then converted into a Vickers hardness number

4. Overview – Testing Materials Brinell Hardness Testing Measures the materials resistance to indentation or scratching The Brinell hardness test uses a hardened steel or tungsten carbide ball of 10mm, 5mm or 1mm diameter. The diameter of the indentation is measured and it is used to indicate the hardness of the material

5. Overview – Testing Materials` Simple Workshop Test (Hardness) Heavy Plunger Clear Acrylic Tube Specimen to be Tested Steel Ball Bearing The Plunger is dropped from a 500mm height onto different materials. The indentations on each test piece are measured. The deeper the indentation – the softer the material

6. Overview – Testing Materials Izod Impact Test Measures a materials toughness Test Specimen Held Vertically Vice Pendulum Start Position of Pendulum Scale to read energy absorbed in breaking the specimen

7. Overview – Testing Materials` Izod Impact Test Measures a materials toughness The Specimen is held vertically in a vice The notch on the specimen faces the pendulum The striking energy of the pendulum is 167 Joules Pendulum Vice Specimen

8. Overview – Testing Materials` Charpy Impact Test Measures a materials toughness The Specimen is held horizontally – between two supports The notch on the specimen faces away from the pendulum The striking energy of the pendulum is 300 Joules Pendulum Support Specimen

9. Overview – Testing Materials` Simple Workshop Test (Toughness) This is another comparative test. The specimen pieces are held vertically in a vice and hit with a hammer It is important to wear a face shield or goggles and for spectators to stand well back. Brittle materials will fracture and possibly splinter. Specimen Vice Hammer Ductile Material

10. ` Overview – Testing Materials` Simple Workshop Test (Deflection) This is another comparative test The specimen is placed on the supports Weights are placed on the platform, pushing the plunger down causing the specimen to deflect Specimens can be tested to destruction or their deflection is measured when the same weight is applied to each in turn Specimen Supports Plunger Weights Platform

11. Overview – Testing Materials` Tensile Testing Measures a materials tensile strength Simple Tensile Testing Machine Clamps for Holding Specimen Dial Gauge to Measure Extension of Specimen

12. Overview – Testing Materials` Simple Workshop Test (Stiffness) This is a comparative test. The material to be tested is clamped to a bench. Weights are applied to the free end. The amount of deflection of each material is measured and compared with each other Deflection Applied Weights Clamped Specimen