which of the following is not an example of primary bonding?
covalent bonding occurs as a result of _________ sharing.
bonds in most metals are referred to as ______.
if the electron configuration of fe is 1s2 2s2 2p6 3s2 3p6 3d6 4s2, then the electron configurations for the fe3 is 1s2 2s2 2p6 3s2 _____.
one point one question
chapter 3 questions and problems
one question one point
how many atoms does the face centered cubic unit cell contain?
the crystal structure of cu is ?
the coordination number of bcc crystal structure is .
the atomic packing factor for fcc is .
interstitial solid solution belongs to .
substitutional atom (impurity) is an example of ______.
one explanation for why graphite powder acts so well as a “solid lubricant”is .
edge and screw dislocations differ in what way?
vacancy diffusion is usually interstitial one.
chapter 5 questions
strain hardening is also named as .
yield strength is corresponding to the occurrence of deformation.
in general, brinell hardness test is to measure the material’s hardness.
with plastic deformation, the increase of dislocation density will result in .
due to , alloys are usually than pure metals of the solvent.
diffusion coefficient is with the increasing diffusion temperature.
the driving force for steady-state diffusion is the __________.
chapter6 questions and problems
chapter 7
the phase diagram of sn-pb alloy is called .
a copper-nickel alloy is high-temperature heat treated; the diffusion of cu into ni and ni into cu regions is referred to as _____________________.
in a plain steel that contains 0.2 percentage carbon, we should expect: .
the maximum solubility of c in γ-austenite - solid solution is .
we have an annealed carbon steel which has hardness of 150hbs. suppose we know the hardness of pearlite is 200hbs and the hardness of ferrite is 80hbs, determine the carbon amount of this steel.
the boundary above which only liquid phase exist is called _________.
strength is increased by making dislocation motion .
heating the cold-worked metal progresses in three stages: .
chapter8 questions and problems
which of the following describes recrystallization?
which of the following plane has the highest planar density for fcc.
during heat treatment of steel, austenite transforms into martensite by .
in the as-quenched state, martensite is very hard and so brittle that a heat treatment known as must be accomplished sequently.
the heat-treatable aluminum alloy can be strengthened by .
engineering stress-strain curve and true stress-strain curve are equal up to .
sterling silver (92.5%ag/7.5%cu) is an example of ___________.
chapter 9 questions and problems
which of the following electron configurations is for an inert gas?
what type(s) of bonding would be expected for brass (a copper–zinc alloy)?
classify which of the following materials are ceramics?
the microstructure of an iron–carbon alloy consists of proeutectoid cementite and pearlite; the mass fractions of these microconstituents are 0.11 and 0.89, respectively. determine the concentration of carbon in this alloy.