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22-Mec-B8 Engineering Materials: December 2014

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Necking of a ductile wire — Considère's criterion
  2. Question 2 Replacing 2024-T4 with 7075-T6 on a stretched business jet
  3. Question 3 Glass-fibre composite — modulus, load sharing and strain
  4. Question 4 Two applications where corrosion is an issue
  5. Question 5 Composition of a barium-borate glass-ceramic in weight percent
  6. Question 6 Why carbon embrittles high-tensile steel, and how maraging steels avoid it
  7. Question 7 Aluminium–lithium floor beams and the promised weight saving
  8. Question 8 ABS versus hardened PVC for an engine-mounted box

Start with Question 1 →

Paper format. National Exams, December 2014 — 07-Mec-B8 Engineering Materials. Three hours, open book; any non-communicating calculator permitted. Eight problems, all of equal value; any FIVE constitute a complete paper, so each problem is worth 20 marks. Candidates are urged to submit a clear statement of any assumptions made. All eight problems are solved below, because the set as a whole is the study resource.

Reference texts (22-Mec-B8 Engineering Materials).

  • Askeland & Wright, The Science and Engineering of Materials, 7th ed. — the primary syllabus text.
  • Callister & Rethwisch, Materials Science and Engineering: An Introduction, 10th ed.
  • Dieter, Mechanical Metallurgy, 3rd ed. — Considère's construction and plastic instability.
  • Shackelford, Introduction to Materials Science for Engineers, 8th ed. — ceramics, glasses and glass-ceramics.
  • Fontana, Corrosion Engineering, 3rd ed. — galvanic series and the area effect.
  • Ashby, Materials Selection in Mechanical Design, 5th ed. — selection criteria and material indices.
  • Polmear, Light Alloys, 5th ed. — aluminium tempers, Al–Li alloys and maraging steels.