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qualification testing

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
... lines. Certified test results from the steel mill, procedure qualification tests of the welding, and design changes to reduce water hammer were also recommended. Impact toughness Notch sensitivity Pipe joints Pipe Water pipelines Welding parameters ASTM A283 grade D UNS K02702 Joining...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001267
EISBN: 978-1-62708-215-0
...Abstract Abstract Music wire springs used in a printer return mechanism failed near the bend in the hook portion of the spring during qualification testing. Samples were examined in a scanning electron microscope equipped with an energy-dispersive x-ray microprobe. Fatigue fractures originated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091726
EISBN: 978-1-62708-217-4
... in both systems as a result of laboratory tests on corrosion, stress corrosion, and impact ignition with N 2 O 4 . Qualification testing of the SPS pressure vessel for 46 days of exposure under a membrane stress of 690 MPa (100 ksi) was completed without problems in mid-1964. In January 1965, an RCS...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048139
EISBN: 978-1-62708-225-9
... by fracture of the conical helical spring sealed within each switch enclosure. The springs were fabricated from 0.43-mm (0.017-in.) diam AISI type 302 stainless steel wire to the configuration shown in Fig. 1(a) . In qualification testing of the springs at room temperature, fractures occurred after 11,000...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001433
EISBN: 978-1-62708-235-8
... subsequently employed on the job must also be assessed by carrying out the appropriate qualification tests. In many instances production tests plates may be called for and it is the usual practice for the item to be finally examined by non-destructive methods and a proof carried out. To the uninitiated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001432
EISBN: 978-1-62708-221-1
... the appropriate qualification tests. In many instances production tests plates may be called for and it is the usual practice for the item to be finally examined by non-destructive methods and a proof carried out. To the uninitiated on the other hand, welding appears on obviously simple process...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001431
EISBN: 978-1-62708-221-1
...- or post-heat. The adequacy of the procedure is then demonstrated by a practical test involving both NDT and destructive test involving both competence of welders subsequently employed on the job must also be assessed by carrying out the appropriate qualification tests. In many instances production tests...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001430
EISBN: 978-1-62708-236-5
... involving both competence of welders subsequently employed on the job must also be assessed by carrying out the appropriate qualification tests. In many instances production tests plates may be called for and it is the usual practice for the item to be finally examined by non-destructive methods and a proof...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... consideration during design ( Ref 4 , 16 ). Thus, developing suitable engineering properties in AM parts requires robust qualification during design. Table 1 summarizes and briefly describes the various types of metal AM technologies. Laser PBF, electron beam melting, and binder jet 3D-printing methods...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
... times longer service than those made of 302. Inconel 600 was eventually used, and no complaints about thirsty chickens have been received since. Music wire springs used in a printer return mechanism failed near the bend in the hook portion of the spring during qualification testing ( Ref 8...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... rate observed in the production test welds was inconsistent with the relative absence of porosity in the development and qualification welds. Thus, the initial inquiries into the cause of weld porosity focused on process control. Two process differences between the production and development welds were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001315
EISBN: 978-1-62708-215-0
... grew, leading to failure. It is recommended that destructive examination of the welded convolute joints be performed on a sample basis as part of the fabrication procedure qualification. However, regardless of quality control measures during fabrication or random destructive testing after...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001613
EISBN: 978-1-62708-235-8
... failed during 5° bend tests required for qualification. Fig. 1 Schematic diagram of the tapped adjusting screw showing various portions The details of screw specification are as follows: Material: 16MnCr5 steel as per DIN: 17210 Composition: C-0.14-0.19%, Si-0.15-0.40%, Mn-1.0...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001663
EISBN: 978-1-62708-236-5
... exercise. Determination of the cause of the explosion was the primary objective of the examination. Metallographic studies included the examination of BFAs fabricated from two different types of alloys that were tested for shock reaction. Optical microscopy supported by electron microscopy and analytical...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
..., “hang-on” bars, or bars cut from a section of the casting. Each test bar will produce mechanical properties that can be correlated to the actual casting based on comparison to a qualification casting but are not the actual mechanical properties. Mechanical properties for forgings may be determined from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
... that failed prematurely during fatigue testing. Failure was due to the presence of a tool mark (indentation) at a bend. (a) Setup for fatigue testing, and detail of the spring showing location of crack at bend 2. (b) A broken end of the spring, 40×; the tool mark (indentation) is just to the right of fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001145
EISBN: 978-1-62708-217-4
... and heavy oxidation, it was possible to remove enough of the oxide layer to examine portions of the fracture surface. Figure 16 shows the pre-existing cracks to be intergranular. This is very similar to fractures produced in stress corrosion tests of 4340 steel ( 3 ), providing evidence...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... fusion zone toughness 6 ) was substituted on future welds, in addition to the procedural changes recommended by the authors. Procedure qualification coupons for the approved procedure (submitted after the initial failure) with both electrodes were also tested for mechanical integrity. While both...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
...), and was subjected to visual inspection/light optical microscopy, metallography, electron microscopy, energy dispersive spectroscopy, chemical analysis, and mechanical testing. It was observed that the vacuum cadmium coating adjacent to the fracture plane had worn off and corroded in service, thus allowing pitting...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2