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

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[27] Corbin SF, Wilkinson DS. The influence of particle distribution on the mechanical response of a particulate metal matrix composite. Acta Metallurgica et Materialia. 1994, 42, pp. 1311-1318 [28] Christman T, Needleman A, Suresh S. An experimental and numerical study of deformation in metal-ceramic composites. Acta Metallurgica. 1989, 37, pp. 3029-3050. [29] Wang Z, Chen TK, Lloyd DJ. A stress distribution in particulate reinforced metal matrix composites subjected to external load. Metallurgical Transactions. 1993, 24A, pp. 197- 207. [30] Tao S, Townley N, Boyd JD. Effects of particulate spacing distribution on internal stress and damage in MMCs. Microstructural Science. 1994, 22, pp 249-259. [31] Goods SH, Brown LM. The nucleation of cavities by plastic deformation. Acta Metallurgica. 1979, 27, pp. 1-15. [32] Tanaka B, Mori T, Nakamura T. Cavity formation at the interface of a spherical inclusion in a plastically deformed matrix. Philosophical Magazine. 1970, 21, pp. 267-279. [33] Ashby MF. Work hardening of dispersion-hardened crystals. Philosophical Magazine. 1966, 14, pp. 1157-1178. [34] Argon AS, Im J, Safoglu R. Cavity formation from inclusions in ductile fracture. Metallurgical Transactions. 1975, 6, pp. 825-838. [35] Argon AS, Im J. Separation of second phase particles in spheroidized 1045 steel, Cu- 0.6Pct Cr alloy, and maraging steel in plastic straining. Metallurgical Transactions. 1975, 6, pp. 839-851. [36] Argon AS, Im J, Needleman A. Distribution of plastic strain and negative pressure in necked steel and copper bars. Metallurgical Transactions. 1975, 6, pp. 815-824. [37] Flom Y, Arsenault RJ. Interfacial bond strength in an aluminum alloy 6061–SiC composite. Materials Science and Engineering. 1986, A77, pp. 191-197. [38] Beremin FM. Cavity formation from inclusions in ductile fracture of A508 steel. Metallurgical Transactions. 1981, 12, pp. 723-729. [39] Berveiller M, Zaoui A. An extension of the self-consistent scheme to plastically-flowing polycrystals. Journal of the Mechanics and Physics of Solids. 1978, 26, pp. 325-344. [40] Toda H, Kobayashi T, Takahashi A. Micromechanism of fracture in wrought aluminum alloy containing coarse inclusion particles. Aluminum Transactions. 1999, 1, pp. 109-116. [41] Hutchinson JW. Singular behavior at the end of a tensile crack tip in a hardening material. Journal of the Mechanics and Physics of Solids. 1968, 16, pp. 13-31. 157
[42] Rice JR, Rosengren GF. Plane strain deformation near a crack tip in a power-law hardening material. Journal of the Mechanics and Physics of Solids. 1968, 16, pp. 1-12. [43] Chan KS. A new criterion for brittle-to-ductile fracture transition. Acta Metallurgica. 1989, 37, pp. 1217-1226. [44] Hutchinson J, Paris P. Stability analysis of J-controlled crack growth. American Society for Testing and Materials. 1979, 668, pp. 37-64. [45] Scherer S, Werth P, Pinz A, Tatschl A, and Kolednik O. Automatic surface reconstruction using SEM images based on a new computer vision approach. In: Kiely CJ, editor. Electron Microscopy and Analysis. Institute of Physics Publishing. Bristol, U.K. 1999, pp. 107-110. [46] Scherer S, Kolednik O. A New System for Automatic Surface Analysis in SEM. Microscopy and Analysis. 2001, 70, pp. 15-17. [47] Kolednik O, Schwarzböck P. Quantitative fractography by means of a new digital image analysis system. In: Fuentes M, Elices M, editors. Fracture Mechanics: Applications and Challanges, Proceedings of ECF13, 2000, Elsevier, Amsterdam, Paper 1U.60. [48] Stampfl J, Scherer S, Berchthaler M, Gruber M, Kolednik O. Determination of the fracture toughness by automatic image processing. International Journal of Fracture. 1996, 78, pp. 35-44. [49] Tatschl A, Kolednik O. A new tool for the experimental characterization of micro- plasticity. Materials Science and Engineering. 2003, 339, pp. 265-280. [50] Stampfl J, Kolednik O. The separation of the fracture energy in metallic materials. International Journal of Fracture. 2000, 101, pp. 321-345. [51] Semprimoschnig COA, Stampfl J, Pippan R, Kolednik O. A new powerful tool for surveying cleavage fracture surfaces. Fatigue and Fracture of Engineering Materials and Structures. 1997, 20, pp.1541-1550. [52] Tatschl A, Gilbert CJ, Schroeder V, Pippan R, Ritchie O. Stereophotogrammetric investigation of overload and cyclic fatigue fracture surface morphologies in a Zr-Ti-Ni- Cu-Be bulk metallic glass. Journal of Materials Resolution. 2000, 15, pp. 898-903. [53] Hebesberger T, Semprimoschnig COA, Pippan R, Kolednik O. In: Kim YM, Dimidik DM, Loretto MH. editors. 2 nd International Symposium on Gamma Titanium Aluminides. The Minerals, Metals and Materials Society. 1999, Warrendale, PA, USA, pp. 573. [54] Qiu H, Enoki M, Kawaguchi Y, Kishi T. A model for the static fracture toughness of ductile structural steel. Engineering Fracture Mechanics. 2003, 70, pp. 599-609. 158
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MONTANUNIVERSITÄT MONTANUNIVERSIT
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TABLE OF CONTENTS 1. Introduction 5
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7.4.4. The effect of ECAP on the lo
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Section 1 The main results of this
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Section 2 2.2. The influence of the
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Section 2 high strength, fine reinf
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Section 2 etched to mark the inclus
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Section 2 (4.) The specimen prepara
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Section 3 Fig. 3.1. The digital ele
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height [µm] height [µm] 10 0 -10
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Section 3 Fig. 3.5. The observation
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Section 3 3.3.2. The determination
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Section 3 The Eshelby tensor does n
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equivalent stress Section 3 Fig. 3.
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Assume σ m eq Calculate matrix sec
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Section 4 Table 4.1. Chemical compo
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4.1.1.3. Fracture mechanics tests S
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Section 4 Fig. 4.4. A view of a com
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Section 4 Table 4.3. Mechanical pro
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εfr [%] εfr [%] N 16 12 8 4 0 150
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Section 4 4.2. The effect of the he
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Section 4 It should be noted that n
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CODi [µm] 40 30 20 10 0 Section 4
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Section 4 Table 4.4. Results of the
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CODi [µm] COD i [µm] CODi [µm] 2
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Cast MMCs 10%-RT 10%-8h 10%-24h 10%
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COD vi [µm] COD vi [µm] CODvi [µ
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CODvi [µm] CODvi [µm] 80 60 40 20
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Section 4 Table 4.6. The values of
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σ p max [MPa] σ p max [MPa] σ p
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σ p max [MPa] σ p max [MPa] 1200
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σ interf max [MPa] σ interf max [
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Section 4 4.5. The relation between
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Section 4 Table 4.9. Conditions for
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Ln(Ln(1/(1-F σ))) Ln(Ln(1/(1-F σ)
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Section 5 diameter of 2…8 µm and
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MnS-inclusion r θ MnS-inclusion Se
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σ interf [MPa] σ interf [MPa] σ
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Section 6 where n is the number of
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Ji [kN/m] J i [kN/m] 25 20 15 10 5
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Section 7 7.2. A model by Tan and Z
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Section 7 its initial length, li. O
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1 µm Section 7 5 µm Fig. 7.3. A s
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Section 7 a) b) c) Fig. 7.4. Micros
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Section 7 It is important that no p
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Section 7 between the Rtot and the
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Section 7 Fig. 7.8. The fracture su
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10 z [mm] 5 -10 -15 Section 7 0 -20
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Section 7 Table 7.3. Data on measur
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8. Summary Section 8 This work deal
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Section 8 The effect of the homogen
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Table 9.1. Data on stress for Speci
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Table 9.3. Data on stress for Speci
Page 107 and 108: Table 9.5. 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 155 and 156: Fig. 12.36. Fracture surface of the
Page 157: [14] Lewandowski JJ, Liu C, Hunt WH
Page 161 and 162: [70] ASTM E1820-01, “Standard Tes
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