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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...
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Published: 01 January 2002
Fig. 22 Deformation and fracture map for (a) magnesium and (b) magnesium oxide. Mode 1, 2, and 3 represent regions of brittle fracture mechanisms (cleavage or IG fracture) with the following conditions: Region 1, pre-existing cracks propagate; Region 2, slip or twin-nucleated cracks propagate More
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Published: 15 January 2021
Fig. 23 Deformation and fracture maps for (a) magnesium and (b) magnesium oxide. Mode 1, 2, and 3 represent regions of brittle fracture mechanisms (cleavage or intergranular fracture) with the following conditions: region 1, preexisting cracks propagate; region 2, slip or twin-nucleated cracks More
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Published: 01 January 2002
Fig. 8 Cathodic protection of a buried pipeline using a buried magnesium anode. Source: Ref 6 More
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Published: 01 January 2002
Fig. 7 Corrosion rates in 3% NaCl solution of magnesium alloy AZ31B coupled with aluminum containing varying amounts of iron and magnesium. The corrosion rate of uncoupled AZ31B is shown for comparison. More
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Published: 01 January 2002
Fig. 3 Relative SCC behavior of austenitic stainless steels in boiling magnesium chloride. Source: Ref 11 More
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Published: 01 June 2019
Fig. 1 Overall view (a) of cracked magnesium alloy AZ31B aircraft wing leading edge panel. Arrows show the length of the crack. (b) Other side of panel shown in (a). A denotes the primary crack; B shows a second, smaller crack. (c) Close-up of fastener holes through which the crack progressed More
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Published: 15 January 2021
Fig. 25 Cathodic protection of a buried pipeline using a buried magnesium anode. Source: Ref 13 More
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Published: 15 January 2021
Fig. 7 Corrosion rates in 3% NaCl solution of magnesium alloy AZ31B coupled with aluminum containing varying amounts of iron and magnesium. The corrosion rate of uncoupled AZ31B is shown for comparison. More
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Published: 15 January 2021
Fig. 27 Concentration of predominant oxides of calcium-magnesium-alumino-silicates (CMAS), grouped by examples of sources of siliceous debris, compositions reported for actual deposits in engines, and model compositions used in laboratory investigations of the problem. Source: Ref 196 More
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Published: 15 January 2021
Fig. 31 Different views of possible calcium-magnesium-alumino-silicate attack on a shipboard turbine blade under the platform in a marine gas turbine engine. Source: Ref 235 . Courtesy of U.S. Navy More
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Published: 15 January 2021
Fig. 32 Effect of sea salt (SS) and sodium sulfate mixture on calcium-magnesium-alumino-silicate (CMAS) melting temperature in tests conducted in ambient air. Courtesy of U.S. Navy More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0045909
EISBN: 978-1-62708-232-7
... Abstract A hot rolled, low-carbon steel pot used to melt magnesium alloys leaked, releasing about 35 kg (80 lb) of molten magnesium onto the foundry floor and causing an extensive fire. Due to the fire, the original leakage hole could not be investigated. Samples of the failed pot were polished...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001123
EISBN: 978-1-62708-214-3
... was different from that specified. The presence of excess aluminum and lead impurities that had segregated to the grain boundaries, coupled with an inadequate amount of magnesium, resulted in intergranular corrosion and subsequent intergranular failure. Corrosion was accelerated by storage in a humid...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006421
EISBN: 978-1-62708-217-4
... Abstract Cracks were found on the wing leading edge of a test aircraft made from AZ31B magnesium alloy. Crack lengths were approximately 230 mm (9 in.) long on the left side and approximately 130 mm (5 in.) long on the right side. The cracks ran parallel to the leading edge. The 230-mm (9...
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Published: 15 January 2021
Fig. 7 Relative stress-corrosion cracking behavior of austenitic stainless steels in boiling magnesium chloride. Source: Ref 11 More
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Published: 30 August 2021
Fig. 3 EDS results showing the inclusion is comprised of (a) aluminum and (b) magnesium. Scan was taken from the image in Fig. 2(b) More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048095
EISBN: 978-1-62708-224-2
... by visual examination to have occurred at the weld joining the sling body and the cross member. Inadequate joint penetration and porosity was revealed by macrographic examination of the weld. Lower silicon content and a higher magnesium and manganese content than the normal for alloy 4043 filler metal were...
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Published: 01 June 2019
Fig. 6 Analysis of the detergent by EDS revealed relatively high amounts of potassium, phosphorus, carbon, and oxygen, along with lower levels of sodium, magnesium, sulfur, and chlorine. More
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Published: 01 June 2019
Fig. 7 Analysis of the rinse water residue by EDS revealed relatively high amounts of potassium, copper, carbon, and oxygen, along with iron, silicon, sodium, magnesium, calcium, sulfur, phosphorus, and chlorine. More