Mechanical Properties of Engineered Materials 2008 Part 6 docx
Mechanical Properties of Engineered Materials 2008 Part 6 docx
... Alloys.
Institute of Metals, London, p 1.
Courtney, T. (1990) Mechanical Behavior of Materials. McGraw-Hill, New York.
Hertzberg, R. W. (19 96) Deformation and Fracture Mechanics of Engineering
Materials. ... Inc.
5.2PHYSICALBASISFORPLASTICITY
5.2.1PlasticityinCeramics
Mostceramicsonlyundergoonlyelasticdeformationpriortotheonsetof
catastrophicfailureatroomtemperature.Hence,mostrepor...
Mechanical Properties of Engineered Materials 2008 Part 8 docx
... Inc.
partialdislocationsisconfinedtoplanescontainingthestackingfaults,
materialswithlowerstackingfaultenergies(wideseparationsofpartials)
tendtoexhibithigherlevelsofstrainhardening(Table7.3).
7.8.6Superdislocations
Sofar,ourdiscussionhasfocusedondislocationmotionindisordered
structuresinwhichthesoluteatomscanoccupyanypositionwithinthe
crystalstructure.However,insomeintermetallicsystems(interme...
Mechanical Properties of Engineered Materials 2008 Part 1 pps
... Inc.
Bibliography
6IntroductiontoDislocationMechanics
6. 1Introduction
6. 2TheoreticalShearStrengthofaCrystallineSolid
6. 3TypesofDislocations
6. 4MovementofDislocations
6. 5ExperimentalObservationsofDislocations
6. 6StressFieldsAroundDislocations
6. 7StrainEnergies
6. 8ForcesonDislocations
6. 9ForcesBetweenDislocations
6. 10ForcesBetweenDislocationsandFreeSurfaces
6. 11Summary
Bib...
Mechanical Properties of Engineered Materials 2008 Part 2 pps
... fundamen-
tals of the mechanical behavior of materials. The text provides a rigorous
review of the fundamental mechanics aspects of the mechanical behavior of
materials.
Shackleford, J. F. (19 96) Introduction ... macroscopic level of understanding of
structure [Figs 16( a)–(d)]. They are often unaware of the atomic and micro-
structural constituents that can affect the...
Mechanical Properties of Engineered Materials 2008 Part 3 ppt
... [Figs 2 .6( a) and 2 .6( b)], solid solution elements [Fig. 2 .6( b)], and
pairs or clusters of the foregoing, Fig. 2 .6( c). Pairs of ions (Frenkel defects)
or vacancies (Schottky defects) are often required ... Hardness
The hardness of a material is a measure of its resistance to penetration by an
indenter. Hardness is also a measure of strength and often has the units of
stress...
Mechanical Properties of Engineered Materials 2008 Part 4 pps
... Inc.
3
BasicDefinitionsofStressandStrain
3.1INTRODUCTION
Themechanicalpropertiesofmaterialsdescribetheircharacteristic
responsestoappliedloadsanddisplacements.However,mosttextsrelate
themechanicalpropertiesofmaterialstostressesandstrains.Itis,therefore,
importantforthereadertobecomefamiliarwiththebasicdefinitionsof
stressandstrainbeforeproceedingontotheremainingchaptersofthis
book.However,thewe...
Mechanical Properties of Engineered Materials 2008 Part 7 ppt
... Inc.
Cottrell, A.H. (1957) The Properties of Materials at High Rates of Strain. Institute of
Mechanical Engineering, London, UK.
Courtney, T.H. (1990) Mechanical Behavior of Materials, John Wiley, New ... Inc.
levels.Furthermore,dislocationloopstendtodevelopsemiellipticalshapes
inanattempttominimizetheirstrainenergies.Thiswillbecomeapparent
lateraftertheconceptofthedislocatio...
Mechanical Properties of Engineered Materials 2008 Part 9 pdf
... Inc.
isms,especiallywhenthenatureoftheparticleboundariespermitdisloca-
tionentryintotheparticles,asshownschematicallyinFigs8.13(a)and
8.13(b)forcoherentandsemicoherentinterfaces(notethatcoherentinter-
faceshavematchingprecipitateandmatrixatomsattheinterfaces,while
semicoherentinterfaceshaveonlypartialmatchingofatoms).Incontrast,
dislocationentry(intotheprecipitate)isdifficultwhentheinterfacesa...
Mechanical Properties of Engineered Materials 2008 Part 10 doc
... Inc.
usarefamiliarwithpolymermatrixcompositesthatareoftenusedinmod-
erntennisracquetsandpolevaults.Wealsoknow,fromwatchingathletic
events,thattheseso-calledadvancedcompositematerialspromotesignifi-
cantimprovementsinperformance.
Thischapterintroducestheconceptsthatarerequiredforabasic
understandingoftheeffectsofcompositereinforcementoncomposite
strengthandmodulus.Followingabriefdescriptionofth...
Mechanical Properties of Engineered Materials 2008 Part 12 pps
... stress fields are
given by
rr
r
2
6
6
4
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7
7
5
¼
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cos
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6
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4
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7
7
7
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7
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7
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ð11:39bÞ
zz
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given by
xx
yy
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2
6
6
4
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7
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¼
K
I
ffiffiffiffiffiffiffiffi
2r
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1 sin
2
sin
3
2
1 þ sin
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6
6
6
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6
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6
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