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interface structures

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048808
EISBN: 978-1-62708-228-0
.... The structure was found to be austenitic in the area where the grain-boundary precipitates appeared heaviest. The composition of the precipitates was analyzed using an electron microprobe to reveal presence of sulfur. Microstructural changes in the weld alloy at the interface were interpreted to be caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0048804
EISBN: 978-1-62708-230-3
... saturated steam from 35 to 380 kPa. Failures were found to occur in the shell body, in a head near a hand hole or a manhole opening, or in a head near the journal-to-head interface. A cleavage fracture was revealed by scanning electron microscopy regardless of the driving stress for failure. Fracture...
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
... interface. (c) Wire/brass plate interface. See also Fig. 2(a) , 2(b) , 2(c) , 3(a) , 3(b) , 3(c) , and 3(d) . The aluminum/iron region ( Fig. 2(a) ) contains a structure with two distinct layers. Conventional analog dot maps of these regions are shown in Fig. 2(b) and 2(c) . Analyses...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001062
EISBN: 978-1-62708-214-3
... to three-point bend testing, and fracture surfaces were examined using SEM fractography, metallography, and depth analysis (SIMS) of the fracture surface. The cracks were found to originate at austenitic grain boundaries that coincided with primary dendrite interfaces. The cracking was attributed...
Image
Published: 01 June 2019
Fig. 1 Cracks in pressure vessel made of ASTM A515 carbon steel lined with type 405 stainless steel. Failure occurred at plug welds because of dilution of weld metal. (a) Micrograph of specimen through weld area etched in acid cupric chloride showing ASTM A515 carbon steel (top), interface More
Image
Published: 30 August 2021
Fig. 29 Cracks in pressure vessel made of ASTM A515 carbon steel lined with type 405 stainless steel. Failure occurred at plug welds because of dilution of weld metal. (a) Micrograph of specimen through weld area etched in acid cupric chloride showing ASTM A515 carbon steel (top), interface More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001834
EISBN: 978-1-62708-241-9
... 0.23 0.66 Inner layer 4.78 6.21 1.13 0.38 0.62 Outer layer … 5.81 … … 0.60 Fig. 2 ( a ) SEM-BSED micrograph of the interface of oxide scale on the inner wall with the substrate, ( b ) higher magnification image of the inset in ( a ); ( c ) EDS spectrum for oxide close...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091809
EISBN: 978-1-62708-217-4
... to microbial growth on the jet fuel. Pitting attack occurred under microbial deposits on the metal surface in the water phase or at the water-fuel interface. The scope of MIC attack on aluminum components used structurally in seven different military and civil aircraft has recently been investigated ( Ref 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001612
EISBN: 978-1-62708-218-1
... that the premature failure of the fan was due to inadequate bonding between the sheets at the weld nugget. The fracture was initiated from the nugget-plate interface. The inadequate penetration and lack of fusion between the steel sheets during resistance spot welding led to poor weld strength and the fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001138
EISBN: 978-1-62708-231-0
... to the internal thread structure of the clevis. As a result of these deleterious effects, the failure of the thread structure of the clevis occurred. The cylinder rod/screw thread interface, because of its small fillet radius, has a high stress concentration factor. As the threads wear away, the clamping...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003526
EISBN: 978-1-62708-180-1
... Abstract This article provides information on the development of finite element analysis (FEA) and describes the general-purpose applications of FEA software programs in structural and thermal, static and transient, and linear and nonlinear analyses. It discusses special-purpose finite element...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047673
EISBN: 978-1-62708-217-4
... Abstract A series of resistance spot welds joining Z-shape and C-shape members of an aircraft drop-tank structure failed during ejection testing. The members were fabricated of alclad aluminum alloy 2024-T62. The back surface of the C-shape members showed severe electrode-indentation marks off...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006773
EISBN: 978-1-62708-295-2
.... This article provides a general view on the applicability of finite-element modeling in conducting analyses of failed components. It highlights the uses of finite-element modeling in the area of failure analysis and design, with emphasis on structural analysis. The discussion covers the general development...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001206
EISBN: 978-1-62708-235-8
... material close to the weld seam and terminates in its interface with the weld material. This takes place specifically where the V-seam widens appreciably as a result of depositing the second overlapping layer; in the crater itself the crack runs in the interface. It is noteworthy that a relatively fine...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... preservation, the fracture surface was not cleaned Fig. 5 Higher magnification SEM image of guide wire fracture showing beach marks consistent with fatigue crack growth Fig. 9 Finite Element model of subject stainless steel stent Fig. 10 Fracture observed at crown–strut interface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001639
EISBN: 978-1-62708-229-7
... indications, four of which were only partially through-wall. The cracks that were examined were found to be slightly longer than expected but still well within the flaw size criteria used to evaluate tank structural integrity. Automated ultrasonic P-scan Ultrasonic ASTM A285 grade B UNS K02200...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
... 0.10 Filler metal Haynes188 37.0 22.0 22.0 14.5 … 0.1 … 3.0 … … Bond coat CoNiCrAlY 44.0 20.0 29.0 … … … … … … 7.0 Fig. 2 Backscattered images of cross-sectional area of (a) 400 and (b) 721ES. Higher-magnification micrographs of top/bond-coat interface of (c) 400...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
.... Due to the structural deformation of the connecting rod, fretting damage occurs at the interface of the thin-shell bearings ( Ref 8 – 11 ) ( Fig. 1 ). Fig. 1 Example of fretting and related visible imprint on the main bearing shell. Adapted from Ref 10 . Reprinted with permission from MAN...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001684
EISBN: 978-1-62708-225-9
... measurements were made on the aspolished specimen with a load of 2 or 4 kg. The DPH hardness values are accurate to about ±10 DPH. Results Microstructural Observations Fig. 3 shows the cross-section of the valve. The columnar grain structure of the seat and shaft show that these were fabricated...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... at the bond. The failures appeared to be predominantly located between the silver layer and the uranium substrate. Normal fracture location of specimens taken from similar components was at the silver/silver bond interface. Laboratory testing revealed that the uranium/silver joint was susceptible to premature...