dissertation global and local fracture properties of metal matrix ...

More documents

Recommendations

Info

Section 7 a) b) c) Fig. 7.7. (a, b) the fracture surface of the PM-MMC Al6061-20%Al2O3 in as-fabricated condition; (c) the fracture surface of the PM-MMC after 7 ECAP passes. 91
Section 7 Fig. 7.8. The fracture surface of the PM-MMC Al6061-20%Al2O3 after 7 ECAP passes. 7.4.4. The effect of ECAP on the local fracture properties As was mentioned in previous section, the fracture surface of the specimen with strongly clustered particle distribution is non-homogeneous. In Figure 7.9, a schematic view of this fracture surface is presented. This scheme is correlated with the stereophotogrammetic pairs subjected to analysis by the automatic fracture surface analysis system (Fig. 7.7a). Table 7.3 provides the results of measurements of the local CODi-values. The local CODi-values were measured at four different points at the particle cluster and at four different points at the area with homogeneous particle distribution on the fracture surface. A significant scatter of the 92
Page 1 and 2:
MONTANUNIVERSITÄT MONTANUNIVERSIT
Page 3 and 4:
TABLE OF CONTENTS 1. Introduction 5
Page 5 and 6:
7.4.4. The effect of ECAP on the lo
Page 7 and 8:
Section 1 The main results of this
Page 9 and 10:
Section 2 2.2. The influence of the
Page 11 and 12:
Section 2 high strength, fine reinf
Page 13 and 14:
Section 2 etched to mark the inclus
Page 15 and 16:
Section 2 (4.) The specimen prepara
Page 17 and 18:
Section 3 Fig. 3.1. The digital ele
Page 19 and 20:
height [µm] height [µm] 10 0 -10
Page 21 and 22:
Section 3 Fig. 3.5. The observation
Page 23 and 24:
Section 3 3.3.2. The determination
Page 25 and 26:
Section 3 The Eshelby tensor does n
Page 27 and 28:
equivalent stress Section 3 Fig. 3.
Page 29 and 30:
Assume σ m eq Calculate matrix sec
Page 31 and 32:
Section 4 Table 4.1. Chemical compo
Page 33 and 34:
4.1.1.3. Fracture mechanics tests S
Page 35 and 36:
Section 4 Fig. 4.4. A view of a com
Page 37 and 38:
Section 4 Table 4.3. Mechanical pro
Page 39 and 40:
εfr [%] εfr [%] N 16 12 8 4 0 150
Page 41 and 42: Section 4 4.2. The effect of the he
Page 43 and 44: Section 4 It should be noted that n
Page 45 and 46: CODi [µm] 40 30 20 10 0 Section 4
Page 47 and 48: Section 4 Table 4.4. Results of the
Page 49 and 50: CODi [µm] COD i [µm] CODi [µm] 2
Page 51 and 52: Cast MMCs 10%-RT 10%-8h 10%-24h 10%
Page 53 and 54: COD vi [µm] COD vi [µm] CODvi [µ
Page 55 and 56: CODvi [µm] CODvi [µm] 80 60 40 20
Page 57 and 58: Section 4 Table 4.6. The values of
Page 59 and 60: σ p max [MPa] σ p max [MPa] σ p
Page 61 and 62: σ p max [MPa] σ p max [MPa] 1200
Page 63 and 64: σ interf max [MPa] σ interf max [
Page 65 and 66: Section 4 4.5. The relation between
Page 67 and 68: Section 4 Table 4.9. Conditions for
Page 69 and 70: Ln(Ln(1/(1-F σ))) Ln(Ln(1/(1-F σ)
Page 71 and 72: Section 5 diameter of 2…8 µm and
Page 73 and 74: MnS-inclusion r θ MnS-inclusion Se
Page 75 and 76: σ interf [MPa] σ interf [MPa] σ
Page 77 and 78: Section 6 where n is the number of
Page 79 and 80: Ji [kN/m] J i [kN/m] 25 20 15 10 5
Page 81 and 82: Section 7 7.2. A model by Tan and Z
Page 83 and 84: Section 7 its initial length, li. O
Page 85 and 86: 1 µm Section 7 5 µm Fig. 7.3. A s
Page 87 and 88: Section 7 a) b) c) Fig. 7.4. Micros
Page 89 and 90: Section 7 It is important that no p
Page 91: Section 7 between the Rtot and the
Page 95 and 96: 10 z [mm] 5 -10 -15 Section 7 0 -20
Page 97 and 98: Section 7 Table 7.3. Data on measur
Page 99 and 100: 8. Summary Section 8 This work deal
Page 101 and 102: Section 8 The effect of the homogen
Page 103 and 104: Table 9.1. Data on stress for Speci
Page 113 and 114: Table 9.11. Data on stress for Spec
Page 119 and 120: Table 9.17. Results of the stereoph
Page 121 and 122: 1 2 1 2 3 3 4 5 6 5 9 119 7 7 8 9 6
Page 123 and 124: 8 9 10 6 10 122 11 12 13 14 11 12 1
Page 125 and 126: 9 10 11 12 13 124 50 µm Fig. 9.6.
Page 127 and 128: 1 2 1 2 3 3 4 4 126 5 5 6 9 7 50 µ
Page 129 and 130: 1 1 2 2 3 4 3 4 5 5 128 6 7 6 7 50
Page 131 and 132: Fig. 9.12. Fracture surface with ma
Page 133 and 134: 1 2 3 1 2 3 4 5 6 7 8 9 10 4 5 132
Page 143 and 144:
Fig. 9.24. Fracture surface with ma
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Fig. 12.36. Fracture surface of the
Page 157 and 158:
[14] Lewandowski JJ, Liu C, Hunt WH
Page 159 and 160:
[42] Rice JR, Rosengren GF. Plane s
Page 161 and 162:
[70] ASTM E1820-01, “Standard Tes
show all

dissertation global and local fracture properties of metal matrix ...

Create successful ePaper yourself

Delete template?

Save as template?