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magnesium-matrix composites

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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
... , these indicate the maximum amounts permitted. OES chemical analysis from representative section of component Table 1 OES chemical analysis from representative section of component Element Wt.% Aluminum Remainder Zinc 5.22 Magnesium 0.63 Chromium 0.41 Iron 0.26 Manganese...
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
... and location of the inclusions influence the material fatigue life. The inclusions with small size in the material surface obviously reduce the fatigue life. The inclusions in the matrix with large size will exert relatively small influence on the fatigue life [ 13 ]. The oxide inclusion, sulfide inclusion...
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
... composition of a portion of the T-hook was determined to be: Element Composition, % Carbon 3.57 Manganese 0.32 Phosphorus 0.024 Sulfur 0.013 Silicon 2.46 Nickel 0.28 Chromium 0.05 Molybdenum <0.03 Copper 0.18 Tin <0.03 Magnesium 0.043 Iron rem...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... indicates that this may be a hydrogen embrittlement process along grain boundaries with excess magnesium at the primary boundaries ( Ref 26 ). If this excess magnesium can be removed either by adding excessive zinc to promote matrix-hardening precipitates or by tying it up in dispersoids such as Al 12 Mg 2...
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
..., 7075-T651, an Al-Mg-Zn-Cu alloy, fails by IG fracture. Evidence indicates that this may be a hydrogen embrittlement process along grain boundaries with excess magnesium at the primary boundaries ( Ref 22 ). If this excess magnesium can be removed either by adding excessive zinc to promote matrix...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... and was packed with molybdenum disulfide (MoS 2 ) lithium grease. Metallurgical structures and chemical compositions of the bearing’s matrix materials were inspected using a microscope and photoelectric direct reading spectrometer. SEM/EDS was used to examine the local morphology and composition of fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001490
EISBN: 978-1-62708-232-7
... Abstract A steel pot used as crucible in a magnesium alloy foundry developed a leak that resulted in a fire and caused extensive damage. Hypotheses as to the cause of the leak included a defect in the pot, overuse, overheating, and poor foundry practices. Scanning electron microscopy...
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
... ksi). The thick scale of corrosion products from 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...
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
... Magnesium 2.51 2.1–2.9 Titanium 0.01 0.20 (max) Iron 0.16 0.50 (max) Aluminum bal bal Fig. 1 Finite-element model showing geometry of turbine impeller Fig. 11 Scanning electron micrograph of fracture surface from fatigue specimen excised from impeller, showing typical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
...-environment combinations, threshold stress is approximately 70% of yield strength ( Ref 10 ). The effect of alloy composition on threshold stress is typified by the graph in Fig. 3 , which illustrates the relationship between applied stress and average time-to-fracture in boiling 42% magnesium chloride...
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
...Results of chemical analysis Table 1 Results of chemical analysis Element Composition, % Sample from sprocket wheel Aluminum alloy LM6M (A413.0) Silicon 10.99 11.0–13.0 Copper 0.25 0.6 (max) Magnesium 0.10 0.1 (max) Iron 0.52 1.3 (max) Manganese 0.28...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... and decomposition are investigated. For nickel-base alloys, Grabke et al. ( Ref 14 – 17 ) proposed six mechanisms: Carbon transfer from the gas phase and dissolution of carbon into the metal phase at oxide defect sites Formation of a supersaturated solution of carbon in the nickel-iron matrix Deposition...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... oxides as impurities; how the reduction of magnesia to magnesium gas and the reoxidation to MgO can be used with great advantage for MgO-carbon bricks (a destruction-reconstruction mechanism that leads to the dense-zone magnesia formation theory); how nonoxide refractories (and nonoxide structural...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001283
EISBN: 978-1-62708-215-0
... using a microprobe identified the segregations as copper-base particles ( Fig. 7 ). Table 1 Results of chemical analysis Element Composition, % Bar stock L77 specification Copper 3.96–4.09 3.9–5.0 Magnesium 0.36–0.56 0.2–0.8 Silicon 0.62–0.76 0.5–0.9 Manganese 0.52...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
.... Carbon brick in vessels is strongly cathodic to the common structural metals and alloys. Impervious graphite, especially in heat-exchanger applications, is cathodic to the less noble metals and alloys. Carbon-filled polymers or metal-matrix composites can act as noble metals in a galvanic couple...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... structural metals and alloys. Impervious graphite, especially in heat-exchanger applications, is cathodic to the less noble metals and alloys. Carbon-filled polymers or metal-matrix composites can act as noble metals in a galvanic couple. Ions of a more noble metal may be reduced on the surface...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... ) 10.1017/S1431927607070122 21. Sone Eli D. , Weiner S. , Addadi L. : Biomineralization of limpet teeth: a cryo-TEM study of the organic matrix and the onset of mineral deposition . J. Struct. Biol. 158 , 428 – 444 ( 2007 ) 10.1016/j.jsb.2007.01.001 22. Holt J.G...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... of the fracture surface with the sectioning plane. Figure 2(a) shows a fracture profile generated from the fracture surface of a tensile test specimen of a metal-matrix composite (MMC) containing unidirectionally aligned alumina fibers in the matrix of an aluminum alloy. Figures 2(b) and 2(c) show...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... Magnesium alloys Aqueous chloride solutions Zirconium alloys Aqueous chloride solutions, organic liquids, I 2 at 350 °C (660 °F) This list is not exhaustive. As metals continue to be used in more extreme environments, discovery of new metal-environment combinations that produce SCC...
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
..., detected during ultrasonic inspection, appeared to have been aggravated by segregation of the hard chromium-manganese-rich, inclusions. These inclusions could have acted as crack initiation sites. Also, the particles appeared to be more reactive to mercury than the matrix. Another factor that contributed...