Material Malleability and Mechanical Properties Quiz

Malleability is a material's susceptibility to extreme deformation in rolling or hammering; the ability of a substance to be hammered or beaten into thin sheets.

Poisson's ratio

Plasticity is the ability of a metal to be deformed considerably without rupture.

<p>A precipitation heat treatment brings about the precipitation of a constituent from a supersaturated solid solution by holding the body at an elevated temperature.</p> Signup and view all the answers

<p>Percent elongation</p> Signup and view all the answers

<p>Proof stress is the stress that causes a specified permanent deformation of a material, usually 0.01% or less.</p> Signup and view all the answers

<p>Silicon strengthens low-alloy steel and improves resistance to high oxidation.</p> Signup and view all the answers

<p>Nodular cast iron, also called ductile iron, has higher strength and ductility compared to gray cast iron, while still maintaining the castability, machinability, and wearability of gray iron.</p> Signup and view all the answers

<p>Tantalum acts as a stabilizer.</p> Signup and view all the answers

<p>Stainless steel provides an economical answer where the environment is significantly corrosive or at high or low temperatures.</p> Signup and view all the answers

<p>Titanium is used for deoxidation and stabilizing austenitic stainless steels; it increases the hardness and strength at high temperatures.</p> Signup and view all the answers

<p>Thermoplastic plastics soften as the temperature rises and remain soft in the heated state, while thermosetting plastics undergo chemical change and harden when heated, usually under pressure.</p> Signup and view all the answers

<p>Vanadium promotes fine-grain structure and improves the ratio of endurance strength to ultimate strength of medium-carbon steels.</p> Signup and view all the answers

<p>Monel is a group of nickel alloys, primarily composed of 67% nickel and 30% copper.</p> Signup and view all the answers

<p>Hardenability is the capacity of steel to through-harden when cooled from above its transformation range.</p> Signup and view all the answers

<p>When plastic deformation is involved, the $\text{Creep Strength / Rupture Stress}$ criterion is used for design at a particular operating temperature and specified length of time.</p> Signup and view all the answers

<p>Gas carburizing involves heating the part in carburizing gases, while liquid carburizing involves immersing the part in a molten salt bath. Liquid carburizing typically results in a thinner case, usually not exceeding 0.025 inches.</p> Signup and view all the answers

<p>Brass is an alloy of copper and zinc, while bronze is an alloy of copper and tin.</p> Signup and view all the answers

<p>Cyaniding is a process of immersing a part in a hot liquid salt bath, commonly using sodium cyanide (NaCN), to harden the surface.</p> Signup and view all the answers

<p>Nitriding involves exposing the part to a nitrogenous environment, such as ammonia gas, while carbonitriding involves the simultaneous absorption of both carbon and nitrogen from a surrounding hot gaseous atmosphere.</p> Signup and view all the answers

<p>The quenching step in flame hardening is used to rapidly cool the heated surface of the metal, thereby increasing its hardness.</p> Signup and view all the answers

<p>In white cast iron, most of the carbon is combined chemically with the iron, resulting in a very hard material.</p> Signup and view all the answers

<p>Wrought iron is made by burning the carbon from molten iron and then subjecting the product to hammering and rolling operations, while cast iron is produced by pouring molten metal into a mold and allowing it to solidify.</p> Signup and view all the answers

<p>The iron plate in the mold is used to cause rapid cooling of the surface, resulting in a harder, chilled surface on the cast iron.</p> Signup and view all the answers

<p>Annealing involves heating and slow cooling of a solid metal, usually done to soften it.</p> Signup and view all the answers

<p>Tempering involves reheating hardened steel below the transformation range, while aging refers to changes in a metal due to quenching or cold working.</p> Signup and view all the answers

<p>The Rockwell hardness test measures the depth of penetration by an indenter to determine the hardness of a material.</p> Signup and view all the answers

<p>The SAE designation 3XXX indicates a nickel-chromium alloy steel.</p> Signup and view all the answers

<p>Molybdenum increases hardenability markedly and economically, and tends to counteract temper brittleness.</p> Signup and view all the answers

<p>Stress relieving involves heating a metal body to a suitable temperature and holding it there to reduce internal residual stresses.</p> Signup and view all the answers

<p>The critical range is the temperature interval during which austenite formation or transformation occurs during heating or cooling of steel.</p> Signup and view all the answers

<p>Graphitizing causes the combined carbon in cast iron to transform wholly or in part into graphitic or free carbon.</p> Signup and view all the answers

<p>The Brinell test uses a 10-mm ball indenter, while the Vickers test uses a square-base diamond pyramid indenter.</p> Signup and view all the answers

<p>Lead improves machinability, but its effects can vary depending on the specific alloy composition.</p> Signup and view all the answers