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blowholes

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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.c9001352
EISBN: 978-1-62708-215-0
... (68°F/h). The presence of several blowholes in the weldment indicated use of poor welding procedures. Improper heat treatment of the martensitic stainless steel/austenitic stainless steel weld at the ball/stem junction, combined with poor welding procedure, were largely responsible...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046737
EISBN: 978-1-62708-229-7
... in the upper parts of the fracture surface. Gas pockets, or blowholes, such as the one shown in Fig. 1(e) , in otherwise ductile metal were also the cause of fracture of laboratory bend-test specimens. Figure 1(f) shows a fracture surface containing large dross inclusions and extreme shrinkage...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
... show various views of the fracture surface. Fig. 1 Overall view of fracture surface. ∼0.2×. Fig. 2 Closeup view of areas A and A'. Note dark and light regions. Pipes and blowholes are present as weld defects. ∼0.5×. Fig. 3 Corner section. Heavy grinding marks on the weld...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001241
EISBN: 978-1-62708-235-8
... attack, hydrogen attack can sometimes be externally perceived by the formation of blowholes which, however, are not filled with molecular hydrogen but with methane. Fig. 11 High pressure tube burst by hydrogen attack. Inside view. 1 × Fig. 12 a). Cross sections, etched in picral...
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
... to the naked eye (blowholes, pinholes) B 110: Class B 100 cavities internal to the casting, not extending to the surface, discernible only by special methods, machining, or fracture of the casting B 111 (a) Internal, rounded cavities, usually smooth-walled, of varied size, isolated or grouped...
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
... B 100 Cavities with generally rounded, smooth walls perceptible to the naked eye (blowholes, pinholes) B 110 Class B 100 cavities internal to the casting, not extending to the surface, discernible only by special methods, machining, or fracture of the casting B 111 (a) Internal...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... and casting practice are the development of centerline segregation and porosity and a condition known as scabs on the surface. Porosity is developed in cast ingots when they solidify and is of two types: pipe and blowholes. Factors that work against obtaining a perfect homogeneous cast ingot include...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
.... The major casting imperfections that may affect induction-hardened workpieces are blowholes or gas holes, which may appear as subsurface voids. These voids can cause nonuniform heating and hot spots. Inclusions may occur during the pouring of molten metal into a casting the mold. They become elongated...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... of porosity can lower mechanical properties appreciably if it is extensive enough to lower static strength. Microporosity is typically found in aluminum alloy weldments. Two common types of porosity are wormholes and blowholes. Wormholes are elongated voids with a definite worm-type shape and texture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2