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electron-beam brazing

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047720
EISBN: 978-1-62708-217-4
.... The weldments were finally secured to the bases of the turbine blades by a brazing operation. One of the laser beam attachment welds broke after a 28-h engine test run. Exposure of the fracture surface for study under the electron microscope revealed the joint had broken in stress rupture. Failure was caused...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... depth of the electron beam. This layer can also be detected by other surface analytical techniques, such as Auger electron spectroscopy (AES), electron spectroscopy for chemical analysis (ESCA), or x-ray photoelectron spectroscopy (XPS). Evaluation of the embrittled material surface is not very easy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001676
EISBN: 978-1-62708-229-7
... S4-10 scanning electron microscope operating at 25 kV; energy-dispersive x-ray analysis was performed using a Tracor Northern NS 880 x-ray analyzer attachment. Auger analysis was performed using a Physical Electronics 595 scanning Auger microprobe with a 5 kV electron beam. Varying amounts...
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
... welding processes. The article also describes failure origins in other welding processes, such as electroslag welds, electrogas welds, flash welds, upset butt welds, flash welds, electron and laser beam weld, and high-frequency induction welds. arc welding brittle fracture electrogas welds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001632
EISBN: 978-1-62708-234-1
...Abstract Abstract A double-walled, hemispherical metal beam exit window made of alloy 718 developed a crack during service, leading to coolant leakage. The window had been exposed to radiation damage from 800 MeV protons and a cyclic stress from 600 MPa tensile to near zero induced by numerous...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... targets have an electron beam path that is roughly concentric to the x-ray beam, which is achieved by adhering a thin piece of target material to the tube window. This style of tube is capable of the highest levels of magnification, because the object being imaged can be placed nearly touching the focal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
...×) and scanning electron microscopy (SEM) (up to 90,000×) of fracture surfaces of cracks produced in service showed that the crack path was always intergranular, regardless of the type of microstructure that was present, the direction of cracking, the in-service external environment, and the type of coupling...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... ). Coatings of MCrAlY are applied by either electron beam physical vapor deposition (EB-PVD) or by thermal or plasma spraying, where M is iron, cobalt, nickel, or a combination of these elements. Typically, these coatings initially contained cobalt or nickel, with 15 wt% Cr, 12 wt% Al, and 0.1 to 0.9 wt% Y...
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
..., and poor weld bead geometry from deficiencies in welding Inclusions Interfaces in layer-type bonded materials (applied by cladding, rolling, electroplating, spraying, brazing, or soldering) Case-core interfaces in case-hardened steels Severe surface irregularities, such as rolling or forging...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001822
EISBN: 978-1-62708-180-1
... of the third axle. Etched with 2% nital. 55× Fig. 17 SEM micrographs of the area from the third axle shown in Fig. 16 . (a) Secondary electron image. (b) Backscattered electron image. (c) Copper x-ray dot map. All 55× Fig. 18 X-ray elemental composition maps made with the electron...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... 10.1520/STP38094S 14. Shieh W.T. , The Relation of Microstructure and Fracture Properties of Electron Beam Melted, Modified SAE 4620 Steels , Metall. Trans. , Vol 5 , May 1974 , p 1069 – 1085 10.1007/BF02644319 15. Metallography: An Introduction , Metallography...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... requirements (e.g., magnetic, electrical, electronic, or thermal properties) typically supersede the mechanical property requirements. Other design disciplines include industrial, automotive, welding, mining, aerospace, nuclear, and computer engineering. Each type of engineering discipline requires...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... region using acetate tape softened in acetone, dried, then carefully stripped from the fracture surface. Upon return to the laboratory, the replicas may be gold coated and examined with a scanning electron microscope (SEM). Foreign particles removed from the fracture surface also may be analyzed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
... during magnetic-particle and scanning electron microscopy (SEM) examination of the groove lips. The remainder of the edge along the groove surface exhibited small segmented shear lips. Metallographic sections were taken through the drain groove and fracture surface at the forward sides of nozzles 1...
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
... of thermal/environmental barrier coating (T/EBC) architecture showing primary environmental protective subsystems and the microstructure of coatings deposited by electron-beam physical vapor deposition. CMAS, calcium-magnesium-alumino-silicate. Reprinted with permission from Wiley Fig. 33 Effect...