REVISION AND PRACTICE E 2 U L These are the most important words you have met in this module. D UNIT 1 brittleness compression ductility elasticity fatigue strength hardness impact malleability plasticity shear tension toughness torsion M O UNIT 2 aluminium alloy alloy steels brass bronze cast iron copper HSLA steels ore plain carbon steels steel titanium alloys tool steels wear resistance VOCABULARY UNIT 3 adhesives binder carbon fibre ceramics composite elastomers glass fibre matrix material monomers polymers thermoplastics reinforcement rubber sintering thermosettings Now use some of them to fill in the blanks. a. ......................... is the opposite of the property of plasticity. b. ......................... is the ability of a material to deform permanently without breaking. c. ......................... is the property that enables a material to withstand shock and be deformed without cracking. d. A combination of different stresses a material can withstand is called ......................... . e. In a composite, one material called the ......................... surrounds and binds together a cluster of fibres or fragments of a much stronger material, the ......................... . f. In a composite, the reinforcement is first placed in the ......................... and then semi-liquid matrix material is sprayed or pumped in to form the object. g. An ......................... is made by mixing two or more metals, or a metal and another substance. h. An ......................... is a mineral or a combination of chemical substances, found naturally in the ground and suitable for obtaining metals. i. ......................... is the process of hardening substances at high temperatures. j. ......................... are k. ......................... with polymers that can return to their original shape after deformation. a high carbon content has a low melting point and little resistance to temperature. l. Many ......................... contain tungsten or chromium to improve hardness or resistance to corrosion. m. ......................... steels have been developed as alternatives to regular alloy steels because they are cheaper, lighter and stronger. n. ......................... is fundamental in cutting tools or shaping parts of power-driven machinery, so very strong and hard ......................... are usually employed. o. ......................... are suitable for prostheses and dental implantations. Complete the following blanks with information taken from the texts you have read. a. Common types of stress are ..................................................................................................................................... b. Hardness is the property of a material 90 ..................................................................................................................