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metal matrix composites

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Published: 01 January 2002
Fig. 2 Fracture profiles. (a) Fracture profile generated from the fracture surface of a metal-matrix composite containing alumina fibers distributed in the matrix of an aluminum alloy. (b) Fracture profile generated from the fracture surface of a tensile test specimen of low-alloy steel. (c More
Image
Published: 01 January 2002
Fig. 8 Profile orientation distribution functions, R L , and profile structure factors Ψ for fracture profiles observed in three vertical sections of the tensile fracture surface of a metal-matrix composite (MMC) generated by uniaxial loading perpendicular to the fibers. The three vertical More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001771
EISBN: 978-1-62708-241-9
... , d ) the EDS analysis of chemical composition of carbide and matrix marked 1 and 2 on ( b ), respectively On the other hand, at high temperature, the growth of carbide in grain boundary takes place and produces a continuous network of carbide in grain boundary. This effect deteriorates...
Image
Published: 01 January 2002
Fig. 22 Failure wear mechanisms of unidirectional fiber reinforced polymer composites with different orientations of fibers with respect to sliding direction against a smooth metal surface. (a) Normal aramid fibers. (b) Parallel carbon fibers. (c) Wear reduction mechanism due to hybridization More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001107
EISBN: 978-1-62708-214-3
..., along with sooty residue. Patterns similar to those associated with erosion/corrosion damage were observed. Microstructural examination of wasted areas revealed a bulk matrix composed of massive carbides, indicating that gross carburization and metal dusting had occurred. X-ray diffraction analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
..., aspect ratio, distribution, orientation, combination with fillers, and the quality of bonding with the matrix), and operating conditions. Fibers are far more wear resistant than the matrix and hence control the wear of composite. Continuous fiber-reinforced composites with a thermoset-polymer matrix...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006869
EISBN: 978-1-62708-395-9
..., distribution, orientation, combination with fillers, and quality of bonding with the matrix ( Ref 4 – 7 ). The main contributor to wear behavior is the filler, which must be selected accurately in order to control the wear of the composite. In the following section, we provide a brief discussion of the effects...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001534
EISBN: 978-1-62708-220-4
... specimens 3.7 Chemical Analysis Chemical compositions of the pipe, the dished end, and the weld metal are given in Table 2 . Carbon and sulfur contents of pipe and dished-end materials were determined by a combustion method, and a titrametric method was used to estimate the concentrations...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001775
EISBN: 978-1-62708-241-9
... a caustic solution (NaOH) to remove HCl from the stream, before the latter was directed to a burner. Metallographic examination showed that the cracks were intergranular and were frequently branched. Although nominal chemical composition of the component was found within the specified range, energy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001687
EISBN: 978-1-62708-220-4
... to detect changes in the chemical composition of the material by changes in the grey level of the image. X-ray mappings and line profiles for carbon, chromium, manganese, iron and nickel were made across the interdendritic regions, over the oxide/matrix interface, at an operating voltage of 15kV. Results...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001031
EISBN: 978-1-62708-214-3
.... 85×. Microprobe Analysis Microprobe analysis was used to determine the morphology and composition of the matrix and phases. Typical microstructure of NARloy-Z was observed away from the banded region ( Fig. 3 ). The second-phase intermetallic located at the grain boundaries had...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001739
EISBN: 978-1-62708-215-0
... partially decarburized pearlite colonies in a ferrite matrix. The microstructure remote from the bulged area consisted of pearlite in a ferrite matrix. EDS analysis of internal deposits on the tube detected a major amount of iron, plus trace amounts of other elements. The evidence indicated that the bulge...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001336
EISBN: 978-1-62708-215-0
... number 4. The vertical scales represent x-ray counts per unit time, and thousands of electron volts. Fig. 8 Qualitative EDS analysis of the typical clean pipe (found in the unetched transverse metallographic cross section of the used new stock pipe), showing the base metal elemental composition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0047312
EISBN: 978-1-62708-224-2
... Abstract A ductile iron T-hook hook was reported to have fractured in service. It was further reported that the hook had been subjected to a load that did not exceed 5900 kg (13,000 lb) at the time of fracture. No information was provided regarding the type of metal used to manufacture the hook...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... investigation revealed that the reason for the fracture was the presence of large carbides at the grain boundaries and in the grain matrix. This led to the formation of microcracks that propagated along the grain boundaries under in-service working forces. It is also believed that the precipitation of carbides...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001818
EISBN: 978-1-62708-241-9
...-base superalloy metal loss wall thinning grain coarsening stereomicroscopy temperature Incoloy 800 (nickel-base superalloy) UNS N08800 Introduction and Background Information The fire tube sleeve of the Heater Treater ruptured while the unit was operating under normal conditions where...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001369
EISBN: 978-1-62708-215-0
... areas on the side opposite the chipped area. Examination using a magnetic yoke and magnetic ink revealed a crack and outlined an area of magnetic permeability different from the base metal ( Fig. 2 ) Fig. 1 Keyway in drive shaft, as received Fig. 2 Keyway after magnetic examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001615
EISBN: 978-1-62708-235-8
... and originate almost exclusively from foreign matter, such as refractory linings, that is occluded in the metal while it is molten or being cast, and (2) those inclusions that form in the metal because of a change in temperature or composition. This second category of nonmetallic inclusions, including oxides...
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
.... After a thorough examination, it was concluded that the part had failed due to dealloying via desiliconification. pump impeller corrosion erosion cast silicon bronze porosity microstructural analysis chemical composition Silicon bronze alloy UNS C86700 Introduction A corroded pump...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001819
EISBN: 978-1-62708-241-9
... to work, but after less than 3 months the shaft was broken. In the second case, the shaft was installed in the pump and after around 2 months it was broken on the edge where a nut locked the rotor in the shaft. The chemical composition of duplex stainless steel, obtained through x-ray fluorescence...