Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 6 ppt
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 6 ppt
... "
1
Fig. 6. 29. Schematic illustration of the tem-
p e rature dependence of the yield strength of
face-centred and body-centred cubic metals
Here k is Boltzmann’s constant and T the absolute ... 10).
Table 6. 6 summarises the strength of some particle-strengthened alu-
minium alloys.
Precipitation hardening
Strengthening of materials by fine particles is frequently obtai...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 7 pptx
... expansion of the two materials,
the matrix is stressed compressively near the particles, impeding crack propa-
262 8 Mechanical behaviour of polymers
T
degree of polymerisation
10
7
10
6
10
5
10
4
10
3
10
2
10
1
T
m
T
g
viscous ... for viscoplastic behaviour
only.
260 8 Mechanical behaviour of polymers
1/%
T
T
g
free
volume
Fig. 8.3. Specific vol ume 1/ of an amo...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 10 pptx
... glass
40 % C
Fig. 10.25. Comparison of the S-N curves of unreinforced as well as glass- and
carb on-reinforced polysul fone (simplified plot after [29])
S-N curves of fibre composites
According to section ... causing
ratchetting.
∗ 10 .6. 6 Ki tagawa diagram
In sections 10 .6. 1 and 10 .6. 2, we discussed two different ways to design
with cyclically loaded materials. Using fracture...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 11 pptx
... Creep deformation
In section 8.2.1, the time-dependent behaviour of polymers was described
using spring -and- dashpot models.
a) Sketch a spring -and- dashpot model suitable to describe creep deformation!
b) ... Larson-Miller data
R
m/100 000/T
/MPa
temp e rature in ℃ 420 450 500 550 60 0 700 800 900
ferritic steels
C 35 108 69 34
19 Mn 5 1 36 85 41
24 CrMo 5 308 2 26 118 36
10 CrM...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 2 doc
... and semi-metals
Al 70 64 76 1.23 108 61 29
Au 78 43 117 1.89 1 86 157 42
Cu 121 67 192 3.22 168 121 75
α-Fe 209 129 2 76 2.13 233 124 117
Ni 207 137 305 2.50 247 147 125
Si − 130 188 1.57 166 64 ... E
isotr.
C
11
C
33
C
44
C
12
C
13
GPa GPa GPa GPa GPa GPa
Mg 44 60 62 16 26 22
Ti 112 162 181 47 92 69
Zn 103 164 64 39 36 53
∗ 2.4.7 Other crystal lattices
The number of indepe...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 4 docx
... stress-s train curve
of AlSi 1 MgMn from figure 4 .6. Taking the value of σ
nss
= 188 .6 MPa and
Young’s modulus of E = 66 200 MPa, we find from equation (4.5)
σ
max
× ε
max
=
(188 .6 MPa)
2
66 200 ... between the particles, the matrix is only single-phase
and thus has an increased ductility. The cavities thus grow by slipping of the
matrix (see sections 6. 2.3 and 6. 2.5) o...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 5 doc
... 2110
6 1 6 Ti, Mg, Zr
{0112} 2110
6 1 6 Zn
{1122} 1100
6 1 6 Ti
Burgers vector out of basal plane
{0110} 2113
3 2 6 Zn
{0111} 2113
6 2 12 Zr
{1121} 2113
6 2 12 Zn, Zr
{1122} 2113
6 2 ... understanding of dislocations.
6. 2 Dislocations
6. 2.1 Typ es of dislocations
Dislocations are one-dimensional (line-s haped ) lattice defec ts. Figure 6. 2(a)
show...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 8 pot
... Araneus diadematus and
8.4 Plastic behaviour 275
Table 8.1. Cross-linking density and Young’s modulus of different types of polymers
(cf. section 1.4.2)
type of material cross-linking density E/GPa
thermoplastics ... chain molecules is larger and enables
9
Mechanical behaviour of fibre reinforced
composites
In composites, different materials are combined to exploit fav...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 9 pot
... application of
ceramic matrix composites are cutting tools made of SiC-whisker reinforced
aluminium oxide for cutting of hard-to-machine materials, especially nickel-
base superalloys and hardened ... enamel.
314 9 Mechanical behaviour of fibre reinforced composites
¾
¾
¾
¾
Fig. 9.11. Deformation of a fibre composite under compressive stress. The fibres
can b end in an in-ph...