EDEXCEL NATIONALS UNIT 10 - PROPETIES AND APPLICATIONS OF ENGINEERING MATERIALS ASSIGNMENT 5 - END OF MODULE ASSIGNMENT

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1 EDEXCEL NATIONALS UNIT 10 - PROPETIES AND APPLICATIONS OF ENGINEERING MATERIALS ASSIGNMENT 5 - END OF MODULE ASSIGNMENT NAME: Date Issued Time allowed 4 weeks I agree to the assessment as contained in this assignment. I confirm that the work submitted is my own work. Signature Date submitted Grading criteria PASS To achieve a pass grade the evidence must show that the learner is able to: Ass1 Ass2 Ass3 Ass4 Ass5 P1 describe the structure (including the atomic structure) associated with a given metal, polymer, ceramic, composite and smart material P2 classify given engineering materials as either metals or non-metals P3 according to their properties describe mechanical, physical, thermal and electrical and magnetic properties and state one practical application of each property in an engineering context P4 describe the effects on the properties and behaviour of processing metals, polymers, ceramics and composites of post-production use of smart P5 use information sources to select a different material for two given applications, describing the criteria considered in the selection process P6 describe the principles of the modes of failure known as ductile/brittle fracture, fatigue and creep P7 perform and record the results of one destructive and one non-destructive test method using one metal and one non-metallic material P8 describe a different process of degradation associated with each of metals, polymers and ceramics. MERIT To achieve a merit grade the evidence must show that, in addition to the pass criteria, the learner is able to: M1 explain how the properties and structure of different given engineering materials affect their behaviour in given engineering applications M2 explain how one destructive and one non-destructive test procedure produces useful results M3 explain how two given degradation processes affect the behaviour of engineering materials. DISTINCTION To achieve a distinction grade the evidence must show that, in addition to the pass and merit criteria, the learner is able to: D1 justify your selection of an engineering material for one given application describing the reasons the selection meets the criteria D2 evaluate the results of one test procedure. Ass1 Ass2 Ass3 Ass4 Ass5 Ass1 Ass2 Ass3 Ass4 Ass5

2 Feedback Comments: Assessment IV by Date Grade Awarded: Tutor Signature Date:

3 PART 1 CARBON STEELS Read your notes and text books and complete the following tasks. TASK 1 Write out a brief definition of the following. Describe at least one component that is made from it. Wrought iron. Mild steel Medium carbon steel High carbon steel. Cast iron TASK 2 Write out a short description of the following heat treatments used with carbon steels. Explain what must be done in order to produce the effect. Explain the result of conducting the treatment (on hardness, strength, toughness etc.) Hardening Annealing Normalising Tempering TASK 3 Find out the temperature required for tempering the following. Knives Twist drills Cold chisel Springs TASK 4 List the properties that may be found by conducting a tensile test. Define hardness. List the types of machines that are used to measure hardness. Define toughness and brittleness. List the types of machines used to toughness.

4 PART 2 TENSILE PROPERTIES A tensile test is conducted on a specimen by stretching it and measuring the force as it stretches. The test is conducted in order to determine several properties of the material. TASK 1 TENSILE PROPERTIES Describe a simple experiment for determining Young's modulus and ultimate tensile strength (UTS) of a ductile metal. The diagram shows the load-extension graph obtained from a tensile test performed on the specimen shown. Using this data determine: (i) The Modulus of Elasticity. (ii) The ultimate tensile strength. (iii) The yield Stress. (iv) The % Elongation. (v) The % reduction in area.

5 TASK 2 PROPERTY SEARCH Go to the Website Matweb.com and search for the materials listed below (search text is the quickest). Print off a copy of what you find and for each find out the following properties. The exact composition The exact condition The tensile strength The yield strength The elongation % Materials to be found are as follows. Aluminium 1050-O Copper UNS C10200 Grey cast iron. Magnesium alloy A2 31B-0 Aluminium Alloy 1201 For each material, find an example of what it is used to make. PART 3 BEARING MATERIALS The following materials are used to make bearings of various kinds. Phosphor-Bronze Cast Iron PTFE Nylon Graphite Find out as much as you can about each material. For each material write at least one page containing the following information. 1. Describe the composition and form of the material in detail. 2. Describe the properties of each that makes it suitable for a bearing. 3. Describe the limitations of each by referring to typical applications. 4. State where you found your information.