Edexcel AS Engineering Unit 1 - Materials

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C A S E H A R D E N I N G T V E G W S D S
Y L I Q U I D S I L I C O N R U B B E R X
G B G X P X N I B G U L T H S Y C A E F V
N R L S I P O X W O K H S V H Q E H S T B
I T S K L E R L U E C B O F A L S D S T A
M N E E L J M V P E A H M H P F X T G E P
R S T Y I B A C J S H X R G E M D Y N V T
O R I O H V L T K V G Y Q X M S P P I I N
F T S O P T I C A L F I B R E S U W L U E
O E O L S J S C Y U K I T D M B S H A T O
M W P Y E U I B L S M O P S O S J E E O A
R U M V X E N B L L V M U B R N P L N C T
E I O P W Q G M U H P C H I Y X F K N X U
H I C M C T B U M Q N V O W A E Q B A V H
T R O T A T I O N A L M O U L D I N G R K
T G W H F G Y H M T O I M M L W J F D P J
U K I X E Q M W A A M N T I O C M U E A E
R J O Y O P F J F R F C B J Y X O H R H M
V M H E A T S H R I N K H K S N K F B K H
H K E E K S B D A E X G S G O P P N H E K
M I U A E T L W T N Y O P A L D P G X N X

Clues

  • All rotationally moulded products are hollow, have no sprues however moulded halves must be joined together. Embossing can also be included. (10, 8)
  • Heat treatment that reverses internal stresses associated with work hardening. Heat material until crystals glow, making it softer and more ductile. Must be maintained until material soaks, cooled slowly. (9)
  • Heat treatment where crystal structure is allowed to become uniform, the crystals become a similar size. Heating a piece of work to a temperature where the crystal structure begins to change. Temperature is maintained until all crystals refined. (11)
  • Metals designed to respond to stresses and strains placed on them. Heat treatment gives the alloy memory. When inserted into a blocked or collapsed artery, it will resume original shape when it reaches body temperature, opening up the artery. (5, 6, 6)
  • Method of increasing the hardness of steels that do not have sufficient carbon to affect internal hardening. Involves the addition of carbon to outer skin. Outer surface is hardened leaving a tough core. (4, 9)
  • Produced by mixing together two or more different materials. Properties from each material can be enhanced and utilised. (10)
  • Products are made from sheet materials. Stretching occurs making the sides thinner than the base. No sprue marks but marks where product has been removed from sheet. Thermoformed products contain more detail. (13)
  • Thermosetting elastomer made up of two components, one is a catalyst. The materials must be in liquid form and have to be mixed consistently before processing. Process is a bit like injection moulding. (6, 7, 6)
  • Tubing is applied over electrical connections and held in place. Heat is applied and the tubing shrinks, permanently covering the connection, ensuring safety. (4, 6)
  • Work by transmitting light as a series of pulses. Significantly greater quantities of data can be transmitted using copper wires, each glass fibre in a cable can carry data. (7, 6)

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