Simple Eutectic - Material Science and Engineering - Exam, Exams of Material Engineering

Download Simple Eutectic - Material Science and Engineering - Exam and more Exams Material Engineering in PDF only on Docsity! Page 1 of 4 CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Semester 2 Examinations 2010 Module Title: Material Science Module Code: MECH 6025 School: Mechanical & Process Engineering Programme Title: Bachelor of Engineering in Mechanical Engineering – Year 2 Bachelor of Engineering in Biomedical Engineering – Year 2 Programme Code: EBIME_7_Y2, EMECH_7_Y2 External Examiner(s): Dr. David FitzPatrick and Mr. Gary Clerkin Internal Examiner(s): Ms. Sally Bryan Instructions: Answer Question 1 and any TWO other questions Duration: 2 Hours Sitting: Summer 2010 Requirements for this examination: Note to Candidates: Please check the Programme Title and the Module Title to ensure that you are attempting the correct examination. If in doubt please contact an Invigilator. Page 2 of 4 1. COMPULSORY QUESTION a) Sketch a simple eutectic type phase equilibrium diagram. (3 marks) b) Define the ‘critical cooling rate’ in the context of quenching (3 marks) c) How can the hardenability of steel be improved? (3 marks) d) State a component that may be case hardened (3 marks) e) Factors that affect corrosion include structural design and internal stress. State two other factors that affect the rate of corrosion. (3 marks) f) Name three common polymeric materials (3 marks) g) What is the opposite of crystallinity? (3 marks) h) Draw a graph of stress v’s strain for a typical brittle fracture (3 marks) i) Define Creep (3 marks) j) State three applications for ‘advanced ceramics’, choose examples that show the wide spectrum of applications (3 marks) k) Fibreglass is an example of what type of material? (3 marks) 2. a) Descibe the process of injection moulding. (7 marks) b) What effect does increasing crystallinity have on the properties of a plastic? (5 marks) c) Briefly describe the manufacture of a simple polymeric material such as polyethylene. (6 marks) d) The tensile test is an important test used to determine the properties of a material. Explain why a lot more care is required in testing and interpreting results when testing polymeric materials compared to metallic materials? What conditions must be closely monitored during testing? Why might a secant modulus be calculated? What information would you hope to get from a relevant ISO standard? (15 marks)