Volume 12 - Fractography Part 12 docx

... machine suction press roll due to stress-corrosion cracking (SCC). The 90-cm (35 -in.) diam perforated roll was made of a centrifugally cast tin bronze (90Cu-10Sn-1Pb) similar to UNS C90500. A circumferential ... sulfidation of a coupling for a hot-gas sampling line used in a coal-gasification pilot plant. The coupling was made of the iron-nickel-base superalloy RA-330 (UNS N08330), joined...

Ngày tải lên: 10/08/2014, 13:20

... (194 0-1 942) (Member, 193 7-1 942) • L.B. Case (193 1-1 933) (Member, 192 7-1 933) • T.D. Cooper (198 4-1 986) (Member, 198 1-1 986) • E.O. Dixon (195 2-1 954) (Member, 194 7-1 955) • R.L. Dowdell (193 8-1 939) ... (Member, 194 4-1 951) • L.J. Korb (1983) (Member, 197 8-1 983) • R.W.E. Leiter (196 2-1 963) (Member, 195 5-1 958, 196 0-1 964) • G.V. Luerssen...

Ngày tải lên: 10/08/2014, 12:22

... 212, 213). The dimples on transgranular fractures and those on intergranular facets in a 0.3C-1Cr-1.25Mo-0.25V-0.7Mn-0.04P steel that was heat treated to an ultimate strength of 880 MPa (128 ... most prominent features unrecognizable. Fig. 77 Effect of a 70 0- °C (129 0- °F) air exposure on an annealed Ti-6Al-2Sn-4Zr- 6Mo alloy dimple rupture overload fracture. (a) As fractured....

Ngày tải lên: 10/08/2014, 12:22

... 1×, the lens-to-film distance (bellows length) begins to exceed the lens-to-object distance and approaches a limiting value of M c f. Similarly, at higher magnification, the lens-to-object distance ... low- and high-magnification analyses are critical to accurate failure analysis. Where the size of the failed part permits, visual examination should be conducted with a low-magnification w...

Ngày tải lên: 10/08/2014, 12:22

... in a cup-and-cone fracture or by an alternate slip method producing a double-cup fracture. Cup-and-cone fractures are observed in ductile iron-base alloys, brass, and Duralumin; double-cup fractures ... wall thickness that was made from quenched-and-tempered AISI 1030 aluminum-killed fine-grain steel with an impact transition temperature below -4 5 °C (-5 0 °F). At room temperature,...

Ngày tải lên: 10/08/2014, 12:22

... μ m) iron-titanium-molybdenum-rich particles were also observed. The larger particles were either titanium- or zirconium-rich, and these may also be an MC-type precipitate. Such grain- boundary ... examination. Figure 4 shows the range of particle sizes and a typical distribution of particles from a fracture surface of an Fe-0.03C-18.5Ni-3Mo-1.4Ti-0.1Al maraging steel specimen that was ....

Ngày tải lên: 10/08/2014, 12:22

... values Ref Al-4Cu 1.48 0-2 .390 18, 69 X7091 aluminum alloy 1 .1 2- 1.31 81 Ti-24V 1.064 82 Ti-28V 1.06 0-1 .147 16 4340 steels 1.44 7-1 .908 24, 69 Al 2 O 3 + 3% glass 1.2 3-1 .62 14 Prototype ... 580 512 (c) 77 L p (mm) L ' p 66.6 84.8 106.7 (b) 60 N L (mm -1 [N' L ] φ (a) 0.0731 0.0465 0.037 -4 9 N S (mm -2 ) N' A 3.45 × 10...

Ngày tải lên: 10/08/2014, 12:22

... 100 to 125 μm corresponds to a ductile-to- brittle transition temperature of approximately 100 °C ( 212 °F). SEM, 450× (J.M. Rigsbee, University of Illinois) Fig. 124 Fig. 125 Fig. 126 Brittle ... Fig. 124 , 125 , and 126 . Fig. 127 : Craters and cavities on fractured collar. Note dark, roughly circular markings in large cavity. SEM, 8×. Fig. 128 : Close-up of dark patches....

Ngày tải lên: 10/08/2014, 12:22

... the laboratory. Fig. 228: Fracture surface with chevrons in case- hardened zone pointing to single origin at top. Fine- and coarse-grained structures in case and core regions, respectively, indicate ... from combined stage I/stage III propagation. 13× (J.M. Morris, U.S. Department of Transportation)

Ngày tải lên: 10/08/2014, 13:20

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Ngày tải lên: 10/08/2014, 13:20