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aluminum-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. 16 Wear failure of PEI and composites (a) Failed surface of PEI while sliding against very smooth ( R a 0.06 μm) aluminum surface resulting in high μ (L 28 N; v 2.1 m/s) Left part shows severe melt flow of PEI; middle portion shows crater with chipped-off molten material ( Ref 46 ). (b More
Image
Published: 01 January 2002
sections are mutually at an angle of 120° to one another, and all three sections contain the vertical axis. The MMC contains aligned alumina fibers in an aluminum alloy matrix. Source: Ref 22 More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
... for hardness testing was also prepared for metallographic inspection. Figure 7 is a micrograph of the casting which demonstrates a dendritic microstructure within grains, as well as the presence of shrinkage voids. As an age-hardenable aluminum alloy, the aluminum matrix will have precipitated intermetallic...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001120
EISBN: 978-1-62708-214-3
... Abstract A segment from a premium-quality H13 tool steel die for die casting of aluminum failed after only 700 shots. The segment was subjected to visual, macroscopic, hardness, and metallographic testing. The investigation revealed that failure occurred as a result of fatigue at an electrical...
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 Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
... The microstructure in the transverse direction section of the drilling bit Fig. 10 The prior austenitic grain of different positions; ( a ) carburized layer; ( b ) transitive layer; ( c ) matrix Abstract A masonry type drill bit, designed for impact drilling in rock, fractured after a short time...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003529
EISBN: 978-1-62708-180-1
... of metals composition in failure analysis work. If the milling to obtain chips for analysis is done in a machine shop where other machining is done, it may be necessary to set up a protective “tent” (for example, out of aluminum foil) around the chips being collected, to prevent contamination by airborne...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001489
EISBN: 978-1-62708-217-4
... — — — — 18.9 16.5 1.0 1.2 — — — 1.5 Fe balance The chemical compositions of the inclusions observed on the polished surfaces of specimens A and B are given in Tables 2 and 3 , respectively. Almost all the inclusions in rings A and B were rich in chromium and aluminum; the concentration...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001303
EISBN: 978-1-62708-215-0
... of the fracture. Most of the fracture surfaces shown are either through a plate or at the interface between a plate and the aluminum matrix. Also, several incipient cracks are associated with plates. Chemical Analysis/Identification Drillings were taken from the wheel and submitted for chemical analysis...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001339
EISBN: 978-1-62708-215-0
... metals, as determined by x-ray fluorescence, are given in Table 1 . Both the pipe and elbow were within the specifications for aluminum alloy 5083. The weld metal composition corresponded to the specification for 5183 filler metal. Results of chemical analysis Table 1 Results of chemical analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001813
EISBN: 978-1-62708-241-9
... present can influence graphitization in different ways: by affecting the stability of the M x C y carbides; by interfering with the diffusion of the carbon in the matrix; or by acting as preferential sites for nucleation. The temperature and the stoichiometric of the carbide 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
... iron, gray cast iron, malleable irons, ductile iron, low-alloy steel castings, austenitic steels, corrosion-resistant castings, and cast aluminum alloys are the materials discussed. The article describes the general types of discontinuities or imperfections for traditional casting with sand molds...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... iron grades are eutectic, or near eutectic alloys, where graphite and the metallic matrix grow cooperatively on solidification. Gray Iron Composition and Microstructure Carbon Equivalent and Carbon Saturation Carbon equivalent (CE) is a simplified method of evaluating the effect...
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
... ). Figure 10 shows blisters around the inclusions. These blisters would have been formed as a result of precipitation of molecular hydrogen at the matrix/particle interface. In addition, several cavities were present around the inclusions ( Fig. 11 ). Energy-dispersive analysis of x-rays (EDAX) conducted...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001381
EISBN: 978-1-62708-215-0
... microstructure. The metallographic specimen showed a significant amount of nonmetallic inclusions. Figure 4 shows a pore, probably a pipe defect in the original bar stock. Fig. 4 Closeup view of a pore in a matrix of tempered martensite. 378× Scanning Electron Microscopy/Fractography Figure 3...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... Abstract An AMS 4126 (7075-T6) aluminum alloy impeller from a radial inflow turbine fractured during commissioning. Initial examination showed that two adjacent vanes had fractured through airfoils in the vicinity of the vane leading edges, and one vane fractured through an airfoil near the hub...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001387
EISBN: 978-1-62708-215-0
...) studies were carried out on the outer and inner surfaces of the gouged anode. EDX analysis of the unattacked nickel matrix showed the presence of nickel only ( Fig. 4 ). Analysis of the outer surface of the gouged resolidified nickel, however, revealed the presence of nickel, iron, aluminum, silicon...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001050
EISBN: 978-1-62708-214-3
... the head-shell gap was analyzed using qualitative emission spectroscopy. It was determined to have a composition similar to the shell chemistry presented above, but with minor amounts of (in decreasing order) lead, sodium, calcium, magnesium, aluminum, and titanium. The lead was probably from a sealing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
.... However, grain-boundary precipitation has been identified as a contributing factor in the IGSCC of aluminum alloys; galvanic effects between the precipitates and matrix are considered to be important. In some cases, the precipitates are anodic, and in others, they are cathodic to the matrix. Peak-aged...