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porous metal

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0046079
EISBN: 978-1-62708-233-4
... reached the highest temperature in service. A 400x etched micrograph showed a brittle and somewhat porous metallic layer about 0.025 mm (0.001 in.) thick on both surfaces of the sheet. Next to this was an apparently single-phase region nearly 0.05 mm (0.002 in.) in thickness. The examination supported...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
... beads, methyl methacrylate monomer polymerized in place, and barium sulfate, which serves as a radiopacifier) or by the growth ofbony tissue into the interstices of metal beads sintered onto the metal substrate. This porous structure allows bone tissue to grow into and mechanically lock the device...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046469
EISBN: 978-1-62708-229-7
...-compressor innercooler tube that failed by dezincification. (a) Unetched longitudinal section through the tube. (b) Micrograph of an unetched specimen showing a thick uniform layer of porous, brittle copper on the inner surface of the tube and extending to a depth of about 0.25 mm (0.010 in.) into the metal...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001373
EISBN: 978-1-62708-215-0
..., illustrating the selective removal of zinc from the β phase. Abstract Abstract Two new chrome-plated CDA 377 brass valves intended for inert gas service failed on initial installation. After a pickling operation to clean the metal, the outer surfaces of the valves had been flashed with copper...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... in Porous Coated F75 Alloys , Quantitative Characterization and Performance of Porous Implants for Hard Tissue , STP 953, ASTM , 1987 . 2. Metals Handbook , 8th ed. , Vol 8 , American Society for Metals , 1973 , p 274 . Selected Reference Selected Reference • Pohler O.E.M...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
...-side layer is porous and the metal-side layer is generally dense. There is, of course, some chromium in the oxide as there is in the alloy steel, but the chromium is not distributed uniformly within the oxide. The porous steam-side layer is almost chromium free while the denser metal-side layer...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001202
EISBN: 978-1-62708-234-1
... Fig. 4 Porous zone under a fracture edge of impeller I (shrinkage zone in Fig. 5 ). 20 × Fig. 5 Cavitation pits (←) and porous zones ↘ in an unetched transverse section from an as yet unfractured region of impeller I. 2.5 × Fig. 6 shows a section of a cavitation region...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048634
EISBN: 978-1-62708-225-9
... from the pins, which were then baked and repeated with a dull, porous cadmium layer that allowed outward diffusion of hydrogen. The pins were baked again after deposition of the porous cadmium layer. This eliminated the problem. Electroplating Fasteners Hydrogen embrittlement 8740 UNS G87400...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091378
EISBN: 978-1-62708-219-8
... deposit analysis, metallurgical examination, and unetched magnified images) supported the conclusion that failure occurred due to porous material typical of plug-type dezincification initiating from the inside surface. Where the dezincification had progressed through the tube wall, the chromium plate had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... of a yellow porous layer was clearly evident between the nitrided layer and the coating, in case of the used punch. Cracks were observed to propagate from the outer surface into the bulk. Oxidation was evident along the cracks. The microstructural transformation observed in the case of the used punch...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001321
EISBN: 978-1-62708-215-0
... and powdery in texture. Counter currents of ions set up between the metal surface and the aqueous environment are responsible for the growth of the oxide layers ( Ref 2 ). Reactions at the metal/oxide interface result in the growth of the compact Fe 3 O 4 . The outer porous oxide is formed Fe +2 ions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001616
EISBN: 978-1-62708-229-7
... originated from the rice straw combustion. The sulfurous products in the flue gas penetrated into the base metal via porous Fe 2 O 3 scale. In addition, some particulate matter would also have settled into the pores of the scale. All these flue gas species diffused into the base metal with age due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001409
EISBN: 978-1-62708-229-7
... of the process is that sound metal is gradually replaced by a brittle, porous deposit of copper, having little mechanical strength; an attack of this form can sometimes be detected visually by the reddish appearance of the deposited copper. In some instances the attack may proceed in a uniform manner from...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001310
EISBN: 978-1-62708-215-0
... crevice attack, porous mass, and intergranular attack at the bottom of the crevice Fig. 2 SEM fractographs of the major fracture surface. (a) Typical transgranular SCC fracture. (b) intergranular attack followed by transgranular cracking. (c) Typical ductile fracture Abstract Abstract...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001045
EISBN: 978-1-62708-214-3
... statements; many exceptions occur ( Ref 1 ). Chemical analysis showed that the tubes were fabricated from copper alloy 270 (yellow brass, 65% Cu), and energy-dispersive analysis showed that only part of the nominal 35% Zn remained in the porous and brittle layer. Metal structure and composition...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
..., Table 1 ): Metallic projections Cavities Discontinuities Defects Incomplete casting Incorrect dimension Inclusions or structural anomalies Table 1 International classification of common casting defects No. Description Common name Sketch Metallic Projections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001410
EISBN: 978-1-62708-220-4
.... It is believed that, in the initial stages, solution of the copper-zinc alloy takes place, this being followed by a secondary reaction resulting in the elector-chemical redeposition of the copper. The net result of the process is that sound metal is gradually replaced by a brittle, porous deposit of copper...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001772
EISBN: 978-1-62708-241-9
.... ( ASM , Metals Park , 1990 ), pp. 131 – 133 Selected References Selected References • Forms of Corrosion , Failure Analysis and Prevention , Vol 11 , ASM Handbook , Becker W.T. and Shipley R.J. , Ed., ASM International , 2002 , p 761 – 795 . 10.31399/asm.hb.v11...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
.... Klepfer H.H. , “Investigation of Cause of Cracking in Austenitic Stainless Steel Piping,” General Electric Company Report NEDO-21000-1, July 1975 7. Danko J.C. , in Proc. Conf. on Materials in Nuclear Technology, American Society for Metals , 1983 , p 181 – 188 8. Marston...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001684
EISBN: 978-1-62708-225-9
... References 1. The Steam Tug Hercules , pamphlet, National Maritime Museum, San Francisco, 1991 . 2. Vander Voort G. F. , Metallographic Laboratory Practices , McGraw-Hill , New York , 1986 . 3. Fink F. W. and Boyd W. K. , The Corrosion of Metals in Marine Environments...