ISE 2500 Midterm 2

The single most important reinforcing filler in rubber is...

carbon black (sturdy black rubber tire)

_____ uses filler metals to permanently join metal parts, but there is no melting of base metals.

Brazing AND soldering (not solid state)

Subsequent to solution heat treatment, what is the name of the heat treatment which very fine precipitates (G-P zones) are allowed to come out of solid solution via re-heating the alloy to a relatively low temperature so that dislocation movement is blocked and the metal is thus hardened

aging (G-P = grandpa = aging)

Continuous one dimensional fiber reinforcement provide ______ properties

anisotropic

Ceramic is defined as an _____ compound consisting of a metal (or semi-metal) and one or more nonmetals

inorganic

The effect on mechanical properties in the ____ zone is usually negative, and it is the region of the weld joint that welding failures often occur.

heat affected zone (HAZ)

Theoretically, the strength of ceramics should be _____ than that of metals because their covalent and ionic bonding types rather than metallic

higher

Parts made of new ceramics sometimes require finishing, in order to...

increase dimensional accuracy, improve surface finish, make minor changes in part geometry. (all of the above)

In some cases, a third ingredient called a _____ must be added to bond primary and secondary phases.

interphase

The allowable variations from the specified part dimensions are permitted in manufacturing is called...

tolerances

The surface roughness can be measured using a stylus instrument called a...

profilometer

The imbedded phase is sometimes referred to as a...

reinforcing agent

Metals are annealed to...

relieve stress from prior metalwork, control properties, recrystallize cold worked metals, reduce brittleness and improve toughness (all of the above)

______ is a heat treatment applied to hardened steels to reduce brittleness, increase ductility and toughness, and relieve stress from the martensite structure

Tempering (temper to ease temper)

The _____ of a value describes the number of digits that are used to express that value.

precision

The function of ______ is to bond individual grains into a solid mass, increase density and reduce or eliminate porosity.

sintering (sintering kiln)

Good weldability is characterized by ...

Ease with which welding is accomplished, absence of weld defects, and strength, ductility, and toughness of welded joint (all of the above)

The term "EDM" stands for...

Electronic Discharge Machine

_______ refers to the relative capacity of a steel to be hardened by transformation to martensite

Hardenability

______ involves various heating and cooling procedures to effect micro-structural changes in the material, which affect its mechanical properties

Heat treatment

________ is a shaping process for producing long, straight sections of constant cross section.

Pultrusion (pull-extrusion)

Process of adding carbon to the surface of a low carbon steel, thereby transforming the surface into a high carbon steel for greater hardening potential is called...

carburizing (carburize with surface carbon)

Welding defects include but are not limited to ...

cavities, solid inclusions, imperfect shape or unacceptable contour, and incomplete fusion. (all of the above)

The term _____ is used for the mechanical techniques of reducing the particle size in ceramic processing.

comminution (small particles in a tight nit community)

During the ISE2500 Metrology lab the measurement made with the dial indicator was a ____ measurement.

comparative (dial indicator compared to the jo block)

Ceramics are substantially stronger in _____ than tension

compression (opposite of tension...?)

Vulcanization causes _______ of the rubber molecules, this strengthens and stiffens the rubber while extensibility is retained.

crosslinking

Curing accomplishes ________ of the polymer, transforming it from its highly plastic condition into a hardened product

crosslinking (more links, stronger material)

Chemical Machining Masking is accomplished by 3 basic methods: screen resist, photographic resist and...

cut and peel (key and peele--chemical machine)

When metal is heated to the austenite region, the structure changes from body centered cubic to...

face centered cubic (FCC)

With traditional ceramics a heat treatment known as ______ is used to make clay a hard ceramic product.

firing

The standard against which other dimensional measuring instruments and gages are compared are called...

gage block, jo blocks, and precision gage blocks. (all of the above)

Abrasive water jet uses aluminum oxide, silicon dioxide, and...

garnet (red garnet ring on the beach)

The 3 basic types of ceramics include traditional ceramics, new ceramics, and ....

glasses

After shaping and before firing the ceramic piece is said to be....

green (green clay)

A cermet is a composite material in which a ceramic is contained in a _____ matrix

metallic | (cermet = [cer]amic + [met]al)

A _______ is defined as a superheated, electrically ionized gas.

plasma

Arc ____ is accomplished by covering the electrode tip, arc, and molten weld pool with a blanket of gas or flux, or both, which inhibit exposure of the weld metal to air.

shielding (arc shielding)

Welding processes can be divided into two major categories: fusion and ....

solid state (solid state welding uses waves)

Production of rubber is followed by processing into final products this consists of compounding, then mixing, shaping, and...

vulcanizing (vulcanizing is treating with sulfur, like a volcano. Makes rubber harder by crosslinking)

The two basic types of EDM are die sinking and...

wire (electronic wires)