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Unformatted text preview: ical consists resulting in the desired
G1 7-27060 /the
IRWIN / Schaffer
passivation A corrosion surface condition under which
quantum number One of four positive shift in its
a material displays a signiﬁcant values, three of which
are integers and the other is 1⁄2, that together determine
Chapter 2 Atomic Scale Structures
the energy and many other important characteristics of
Pauli exclusion principle A quantum mechanics
quantum numbers.1 within an atom.
an electron stating that no two interactingsuccessful in explaining a
concept While the wave equation is extremely electrons can have
great many aspects of the properties of electrons, the physicist Wolfgang Pauli found that
the same of
recombination an electron required the speciﬁcation of anelectron value
An interaction between an additional and
a complete description four quantum numbers.
associated with electron “spin.” This fourth quantum number, ms , can only take on values
a hole that results in the loss of both chargealternate
pearlite A two-phase microstructure of carriers.
of 1 . Another outcome of Pauli’s work, known as the Pauli exclusion principle, states
ferrite The reduction of some four values for their quantum
that recovery and cementite lamellaesame of the in someenergy
no two interacting electrons may have the occurring stored steels.
numbers. Thus, each forms by the decomposition of austenite.
Pearlite electron in an atom has a unique set of four quantum numbers that
introduced by cold-working a material.
completely describe its characteristics.
One of percent reduction in area (%RA) the this change in and
the main reasons for Process involving The text is that area
recrystallization introducing quantum numbers in nucleationthey can
be used to divided by the original area (expressed electrons in an atom. The
characterize the energy levels and arrangement of the in percent) of a
growth of new, strain-free grains and quantum numbers (with m
energy of an electron is primarily a function of its nin a l deformed ma...
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