Reminder for Cuncai’s Prelim Seminar
From: Son, Rosemary E
Sent: Thursday, May 04, 2017 8:30 AM
To: 'msefaculty-list@ecn.purdue.edu' <msefaculty-list@ecn.purdue.edu>; 'msegradstudent-list@ecn.purdue.edu' <msegradstudent-list@ecn.purdue.edu>; 'mseposdoc-list@ecn.purdue.edu' <mseposdoc-list@ecn.purdue.edu>
Cc: 'Cuncai Fan' <fan184@purdue.edu>; Cline, Vicki L. <vicline@purdue.edu>; Son, Rosemary E <son39@purdue.edu>
Subject: Seminar Notice for Cuncai Fan's Preliminary Exam, May 12, at 9:00 a.m., in ARMS 1021, " Radiation Damage in Nano-Crystalline Metals"
MATERIALS ENGINEERING
“Radiation Damage in Nano-Chrystalline Metals”
By
Cuncai Fan
Purdue MSE Ph.D. Preliminary Exam
Advisor: Professor Xinghang Zhang
ABSTRACT
Materials
exposed
to heavy
irradiation of
energetic neutrons or
ions
are subject
to damage cascade
with
significant microstructural alteration.
For
crystalline
metals, large
concentrations of
point defects
or defect
clusters
are formed
in
them, together
with radiation-induced
segregation or
precipitation in
some
metallic
alloys. These
microstructural
changes
typically cause
significant changes
in the
physical and
mechanical
properties,
such
as swelling,
growth and creep,
as
well as
hardness
and embrittlement.
Previous
studies
indicate
that
nano-crystalline
metals exhibit
a higher
radiation
tolerance
than their
coarse-grained
counterparts. This
enhanced
property is
ascribed to
the high
density
of grain
boundaries
that can
act
as effective
defect
sinks and
suppress
radiation damage.
Meanwhile,
radiation
often induce
grain
growth in
nano-crystalline metals,
and thus
it remains
a challenge to
design and synthesize
resistant materials
with
high stability.
Keywords:
damage
cascade,
defect clusters,
property
degradation,
defect
sinks, grain
coarsening.
Date: Friday, May 12, 2017
Time: 9:00 A.M.
Place: ARMS 1021