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Gun tubes

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001671
EISBN: 978-1-62708-234-1
...Abstract Abstract Important clues about the probable cause of a gun tube explosion were obtained from a fractographic and metallographic examination of the fragments. The size, distribution, and surface markings of fragments may be used to localize the explosion and deduce its intensity...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089657
EISBN: 978-1-62708-233-4
...Abstract Abstract The gun mount used in two types of self-propelled artillery consists of an oil-filled recoil cylinder and a sand-cast (MIL-I-11466, grade D7003) ductile-iron piston that connects to the gun tube through a threaded rod. The piston contains several orifices through which oil...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047010
EISBN: 978-1-62708-234-1
... including a maraging steel (18% Ni, grade 250), a vanadium-modified 4337 gun steel (4337V), H19 tool steel, and high-temperature alloys Rene 41, Inconel 718, and Udimet 630. All the alloys evaluated had been used in mortar tubes previously or were known to meet the estimated minimum yield strength...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... resolution capabilities of all SEMs. A compromise is reached in the thermal-field-emission (or Schottky gun) SEM when a combination of heat and electric field are used to produce an electron beam. These machines have better resolution than conventional SEMs, while being easier to use than the cold-field...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... is reached in the thermal-field-emission (or Schottky gun) SEM, where a combination of heat and electric field are used to produce electrons. These machines have better resolution than conventional SEMs, while being easier to use than the high-resolution machines. A conventional SEM also requires...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006771
EISBN: 978-1-62708-295-2
... liquid metal ion gun (LMIG), typically bismuth, gold, or gallium, it is also possible to record the lateral distribution of chemical species across a surface with sub-100 nm spatial resolution. Because secondary ion intensities vary dramatically from element to element and are highly dependent...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
.... , Vol 45 ( No. 23 ), Sept 20 , 1973 , p 146 – 151 2. Goldner D. , Plastic Bending in Tubular Beams , Mach. Des. , Vol 45 ( No. 24 ), Oct 4 , 1973 , p 152 – 155 3. Donnell L.H. , “ Stability of Thin-Walled Tubes under Torsion ,” National Advisory Committee...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
..., the shotgun barrel had a longitudinal profile of inside diameter as shown in the “After test” curve in Fig. 7(a) . Comparison of this curve with the profile before the test shows that the effect of firing soft iron shot was to deform the gun barrel so that the choke taper was shifted toward the muzzle. After...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
..., the characteristic teardrop shape of cavities is apparent at low magnification, as may be seen in Fig. 8 . Fig. 8 Elongated surface cavities on the inside surface of a 70-30 cupronickel tube produced by erosion-corrosion. The tube surface is clean, the attack having occurred due to brine flowing through...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Section adjacent to the fracture surface of a CrMo tube that ruptured after 70,000 h at a nominal temperature of 490 °C (915 °F). (a) Polished and etched to emphasize grain-boundary voids. (b) Polished and etched carefully to show grain boundaries. Nital etch Fig. 36 Scanning electron microscope...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... to achieve the required fluid velocities ( Ref 56 ). Another device used to produce cavitation and erosion is the liquid gun, which projects short, discrete slugs of liquid out of a nozzle onto the specimen ( Ref 57 ). Details of other nonstandard test procedures are available in Ref 58 , 59 , 60...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003534
EISBN: 978-1-62708-180-1
... sputter ion gun. The ion gun is used to slowly remove material, thus exposing a new surface to be analyzed. By sequentially sputtering and taking XPS data, a compositional depth profile can be generated ( Fig. 6 ). If the chemical matrix of the sample is not severely damaged by the sputter ion beam...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... layers or more with thicknesses varying from at least 100 mm (4 in.) up to 500 mm (20 in.) or more. Refractories are either shaped materials (bricks and various other formats, including lances, tubes, nozzles, and so forth) or unshaped or monolithic materials (delivered to the users in bags, sacks...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice sites. (d) Drain valves should be designed with sloping bottoms to avoid pitting of the base of the valve. (e) Nonsloping tubing can leave pools of liquid at shutdown. (f) Nonvertical assembly of the heat...
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