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Aluminum brass

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001334
EISBN: 978-1-62708-215-0
... Abstract Leaks developed at random locations in aluminum brass condenser tubes within the first year of operation of a steam condenser in a nuclear power plant. One failed tube underwent scanning electron microscopy surface examination and optical microscope metallography. It was determined...
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Published: 01 June 2019
Fig. 3(b) X-ray dot map for aluminum at the aluminum/brass interface shown in Fig. 3(a) . More
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Published: 01 June 2019
Fig. 3(a) Scanning electron micrograph of the aluminum/brass interface showing atomic number contrast. Analysis of numbered regions given in Table 2 . See also Fig. 3(b) , 3(c) , and 3(d) . More
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Published: 01 June 2019
Fig. 3(c) X-ray dot map for zinc at the aluminum/brass interface shown in Fig. 3(a) . More
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Published: 01 June 2019
Fig. 3(d) X-ray dot map for copper at the aluminum/brass interface shown in Fig. 3(a) . Source: Ref 2 More
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Published: 01 June 2019
Fig. 1 Failed aluminum brass condenser tube from a saltwater heat exchanger. The tube failed from pitting caused by hydrogen sulfide and chlorides in the feedwater. (a) Cross section of tube showing deep pits and excessive metal wastage. 2 3 4 ×. (b) Higher magnification view of a pit More
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Published: 30 August 2021
Fig. 4 Failed aluminum brass condenser tube from a saltwater heat exchanger. The tube failed from pitting caused by hydrogen sulfide and chlorides in the feedwater. (a) Cross section of tube showing deep pits and excessive metal wastage. Original magnification: 2.75×. (b) Higher-magnification More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0049838
EISBN: 978-1-62708-222-8
... intermetallic compounds found in the aluminum-iron phase diagram. Similar compositional variations were noted at the aluminum/brass interface. It was concluded that the failure of the electrical junction due to extreme heating was related to the formation of intermetallic compounds at the current carrying...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091806
EISBN: 978-1-62708-219-8
... station condenser tubing cooled by seawater for two copper alloys, an aluminum brass alloyed with arsenic (UNS C68700, ASTM B111, or Cu-Zn-20Al DIN17660), and a cupronickel 70-30 alloy with iron added (C71500, ASTM B111, or Cu-Ni-30Fe DIN17665)) supported the conclusion that the failure was caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048702
EISBN: 978-1-62708-220-4
... Abstract An aluminum brass seawater surface condenser failed due to pitting after less than one year of service. Large pits filled with a green deposit were evidenced under the nonuniform black scale present over the entire inside surface of the tube. The black deposit was identified...
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
... susceptible to dezincification. Recommendations included replacing the material with copper alloy C68700 (arsenical aluminum brass), which contains 0.02 to 0.06% As and is highly resistant to dezincification. Copper alloy C44300 (inhibited admiralty metal) could be an alternative selection...
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
... exfoliated from the base material and cracked. Recommendations included replacing the piping with a more corrosion-resistant material such as red brass (UNS C23000), inhibited Admiralty brass (UNS C44300), or arsenical aluminum brass (UNS C68700). Dezincification Fresh water Perforation Piping...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001222
EISBN: 978-1-62708-225-9
.... Because the die cast brass was alloyed with aluminum, these inclusions consisted predominantly of aluminum oxide. The tolerable limit in pores and oxide inclusions was greatly exceeded in the lift disk under examination. Above all, the numerous oxide skins disrupted the cohesion of the microstructure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001012
EISBN: 978-1-62708-234-1
... Abstract An interstage radiator gas coil began leaking after only 45 days of service. The original brass coil with several aluminum fins was replaced three times but each replacement lasted less than a day. After removing the fins, leaks were found at circumferential cracks. A section of a tube...
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Published: 01 June 2019
Fig. 1 Optical micrographs of the cross section of an aluminum wire, iron screw, and brass plate in a conventional household electrical outlet assembly. (a) Overall view. (b) Wire/screw interface. (c) Wire/brass plate interface. See also Fig. 2(a) , 2(b) , 2(c) , 3(a) , 3(b) , 3(c More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091703
EISBN: 978-1-62708-229-7
... identified using powder x-ray diffraction (XRD) techniques. The internal deposits consisted of silicon oxide (SiO 2 ), potassium aluminum silicate (KAlSiO 4 ), calcium carbonate (CaCO 3 ), and ammonium copper sulfite hydrate [(NH 4 ) 7 Cu(SO 2 ) 4 · 5H 2 O]. In addition to the elements contained...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... of cup-and-cone fractures reveal a version of ductile dimples when viewed in the SEM ( Fig. 5 ). Fig. 5 (a) Ductile failure of aluminum tensile bar exhibiting orange peel. (b) Cup-shaped fracture and stretching of stainless steel tensile bar. (c) Scanning electron microscope image of ductile...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... of embrittlement failure are analyzed, including liquid-metal embrittlement (LME) of an aluminum alloy pipe in a natural gas plant, solid metal-induced embrittlement (SMIE) of a brass valve in an aircraft engine oil cooler, LME of a cadmium-plated steel screw from a crashed helicopter, and LME of a steel gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001521
EISBN: 978-1-62708-229-7
... that the following alloys do not have a tendency for stress corrosion cracking in auxiliary heat exchangers (oil coolers): 90Cu-10Ni, 70Cu-30 Ni, arsenical copper, Alloy 194, and aluminum bronze. As a result, the use of 90Cu-10Ni (B111-Alloy C70600) is recommended for the replacement tubes. In addition...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001313
EISBN: 978-1-62708-215-0
... are shown in Fig. 6 . The internal deposits consisted of silicon oxide (SiO 2 ), potassium aluminum silicate (KAlSiO 4 ), calcium carbonate (CaCO 3 ), and ammonium copper sulfite hydrate [(NH 4 ) 7 CU(SO 2 ) 4 .5H 2 O]. In addition to the elements contained in these compounds, EDS detected minor to trace...