21-Mat-A4 Deformation Behaviour and Properties of Materials, December 2013: worked solutions

21-Mat-A4 Deformation Behaviour and Properties of Materials: December 2013

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

Paper format. National Exams, December 2013 — Met-A4, Structure of Materials. Three hours, closed book, one approved calculator (Casio or Sharp). Eight questions of 20 marks each; the rubric asks for any five, and only the first five in the answer book are marked. All eight are solved here. All necessary equations and constants are provided in the exam's own appendix (reproduced where used below).

The printed exam header reads Met-A4, Structure of Materials. Only two of the eight questions (VI and VII) are genuinely diffusion/mechanical-properties content; the paper as a whole is a broad introductory materials-science survey — bonding, crystal defects, crystallography, XRD and phase diagrams — and is answered as such below.

Reference texts. The answers below are keyed to the works normally recommended for this syllabus code:

W. D. Callister and D. G. Rethwisch, Materials Science and Engineering: An Introduction, 10th ed. — atomic bonding, crystal structure, imperfections, diffusion, mechanical properties, phase diagrams.
G. E. Dieter, Mechanical Metallurgy, 3rd ed. — stress–strain analysis, resilience and toughness.