Final Metallurgy Test T/FWrought

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Iron undergoes four phase changes when cooled from the melting point to the ambient temperature

F

Isotropu is the devlopment of direction specific properties due to cold working

F

Low beryllium coppers have relatively low electrical conductivity

F

Many ASTM standards contain supplementary requirements that are incorporated at the beginning of a standard and are identified by the letter R

F

Martensitic stainless steels contain the greatest amount of chromium and are the most corrosion resistant

F

Mss Sp 55 is a standard developed by the ALuminum Association

F

Prior cold working is required to initiate grain growth

F

Resolved shear is the combination of slip planes and directions in the crystal lattice in which plastic deformation by slip occurs most favorably

F

Silicon is a strengthening agent in precipitation hardened alloys

F

Stainless steels have a higher resistance to highly reducing acids

F

Stress relieving of austenitic stainless steels must be performed at lower temperatures than for most steels

F

The 2xxx series alloys are more corrosion resistant than most other aluminum alloys

F

The 5xxx series alloys have low strength and poor weldability

F

The 7xx.x series alloys are machinable, weldable, and exhibit excellent castability

F

The 8xxx series comprises aluminum magnesium alloys

F

The amount of carbon that is dissolved in iron has no effect on the phase changes that occur

F

The corrosion resistance of austenitic precipitation hardening stainless steels is greater than that of the regular austenitic stainless steels.

F

The duplex stainless teel has a two phase microstructure consisting of ferrite and pearlite

F

The final staged of reduction in hot working operations must be conducted well above the recrystallization temperatures

F

The longer the holding time at a particular stress relieving temperature, the less the precent of residual stress removed

F

The most common hardening heat treatments for copper alloys consist of precipitation hardening, transformation hardening, spinodal decomposition, and stress relieving

F

The principle reason for using carbide formers is that they combine preferentially with iron

F

The relatively high chromium content of ferritic stainless steels places them to the left of the gamma loop

F

The three stages of steelmaking are oxidation, deoxidation, and rimming

F

The three variations of big end down ingot mold are open top, bottle top, and plug bottom.

F

Tough Pitch copper is the easiest copper alloy to spin

F

When a crystal containing an edge dislocation is mechanically loaded, the dislocation moves 1 Burgers bectors

F

Wrought Iron contains large amounts of carbon and manganese

F

Wrought stainless steels are AISI designated by five numbers followed by a letter

F

Wrought tin bronzes contain signifigantly more lead than their cast equivalents

F

Yellow brasses are cheaper by weaker than red and semi red brasses

F

Fiber Structure is the elongation of inclusions and impurities in the direction of cold work

T

For complete transformation to austenite, a steel must be heated above its AC3 or ACcm temperature

T

Foundries that cast copper alloys use prealloyed ingot, scrap, and virgin metal for raw materials

T

Hot working permits more deformation than cold working

T

Hypoeutectoid steel with 0.2% C has good weldability and formability.

T

In coarse grain steel, the grain size increases as the temperature is increased above the A1.

T

Low operation temperatures decrease pitting and crevice corrosion

T

Nickel is added to aluminum bronzes to improve corrosion resistance

T

Normalizing decreases the pearlite interlamellar spacing and refines grain size.

T

Precipitation hardened aluminum alloys are less easy to weld than other aluminum alloys

T

Precipitation hardening stainless steels can be heat treated to higher strengths than any other stainless steels

T

Re crystallization leads to a sharp drop in strength and a rise in ductility

T

Recovery occurs without any apparent change in the mechanical or physical properties except for electrical conductivity

T

Red and semi red brasses are the easiest alloys to cast

T

Reduction is the removal of chemically combined oxygen in iron ore

T

Semi austenitic precipiation hardening stainless steels are chiefly available in sheet form

T

Silicon bronzes have high strength, good toughness, and excellent corrosion resistance

T

Slip is a process of plastic deformation in which one part of a metal grain undergoes a shear displacement relative to another

T

Stainless steels are the most widely used of all corrosion resistant alloys

T

Stainless steels are usually cut by shearing or blanking

T

Stainless steels generally fail because of localized forms of corrosion

T

The 3xx.x series alloys are the most important because of their superior casting characteristics

T

The 8xx.x series comprises aluminum alloys with approximately 8% Sn

T

The checker chamber of an open hearth furnace preheats the air and helps to improve the efficiency of the furnace

T

The corrosion resistance of aluminum alloys is strongly influenced by the alloy content

T

The larger the austenite grain size, the coarser the ferrite pearlite grain size

T

The most favorable orientation of a crystallographic plane for slip is 45 degrres to the direction of applied force

T

The principle alloying elements in aluminum are copper, magnesium, silicon, manganese, zinc, and tin

T

The strength of commerically pure aluminum may be more than doubled by cold working

T

The three groups of martensitic stainless steels are low carbon, nickel bearing low carbon, and high carbon.

T

UNS designations consist of an uppercase letter followed by five numbers

T

Unlike other noble metals, copper can be attacked in some environments

T

A pipe is an internal fissure caused by internal tensile stresses resulting from heating and cooling

F

Adding nickel to steel is the most cost effective approach to ensuring a completely austenitic structure

F

Aluminum bronzes are leaded

F

Anneal resistant coppers are modified coppers containing zirconium or nickel and phosphorus

F

Austenitic stainless steels can only be strengthed by heat treatment

F

Casting Processes used for aluminum and aluminum alloys are limited to die casting and sand casting

F

Close packed haxagonal metals have a total of 12 slip systems

F

Coarse grain size increases ductility and toughness

F

Cold working is used on copper alloys that remain ductile above their recrystallization temperatures

F

Copper nickels have excellent strength but lower corrosion resistance than other copper alloys

F

Ferrite is capable of dissolving more carbon than austenite

F

Flaking is the development of internal cracks or bursts usually during cooling after rolling or forging

F

Graphitization renders steel highly ductile

F

Integrated steelworks are smaller operations that produce a limited range of carbon steel finished forms

F

AISI STell Products Manuals indicate restrictions and tolerances applicable to various product forms based on accepted manufacturing practices

T

Aluminum is extracted from bauxite ore

T

An advantage of fully killed steel is the resistance to grain coarsening during high temperature heat treatment operations.

T

Anneal resistant coppers have high resistance to elevated temperatures

T

Annealing is performed on both heat treatable and non heat treatable aluminum alloys

T

Annealing twins are not present in annealed castings

T

Because of grain refinement during multiple pass welding of steel, the weld is stronger than that of single pass welding.

T

Brazing is performed on metals that have very thing cross sections or inaccessible joints

T

Carbon and manganese are the pinciple alloying elements in carbon steel

T

Cast aluminum bronzes have superior galling and fatigue resistance compared to the manganese bronzes

T

Cast beryllium coppers must be solution treated to homogenize their microstructures

T

Coarse grain steel is generally deoxidized with silicon

T

Cold forming is performed on non heat treatable alloys

T

Coper alloys are extensively used for saltwater application

T

Copper alloy castings have wider permissible chemical composition ranges than equivalent wrought copper alloys have

T

Copper is used for its high electrical conductivity and high thermal conductivity more than any other metal

T

Critical temperatures are the same with cooling and heat

T

Crystal roation is the reorientation of individual crystals that are under an applied force, so that the crystallographic planes move into the most favorable orientation for slip

T

Dislocations are usually a combination of edge and screw types

T

Duplex stainless steels have better strength than austenitic stainless steels

T

Equivalent cast and wrought copper alloys have similar machinability

T

Eutectic steel at room temperature consists of 100 percent austenite

T

Ferrite is not present at room temperature for the 18% Carbon. 8% Nickel Alloy

T

Ferritic stainless steels are relatively weak and cannot be hardened by quenching

T

ASTM abd ANSI jointly devloped the unified numbering system for metals and alloys

f

Chinese standards for products are identified by the letters CH

f

Euronorms are identified by the letters UN followed by a number

f

The ASME boiler and pressure vessel code is published in a single document

f

UNS designations consist of a capital letter follow by four numbers

f

Most standards that address welding procedures are developed by the AWS

t

The 5xx.x series alloys are limited by poor castability and weldability

t

The castability of the 2xx.x series alloys is poor

t

The three classes of standards are specifications, test methods, and recommended practices

t

a materials procurement specification should reference applicable ASTM standards

t


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