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quality control test

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... of silica phenolic tape produced from flawed materials that went undetected by the quality control tests, which at the time, assessed tape strength properties in the warp rather than the bias direction. Once the nozzle manufacturer and its suppliers identified the problem, they changed their quality control...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001389
EISBN: 978-1-62708-215-0
... metal contacts Abstract During routine quality control testing, small circuit breakers exhibited high contact resistance and, in some cases, insulation of the contacts by a surface film. The contacts were made of silver-refractory (tungsten or molybdenum) alloys. Infrared analysis revealed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... shows a typical knee implant after porous coating. Bead separation occurred at several locations along the top inside edge of the back of the casting during routine quality-control testing. This region is referred to as the patella flange and is shown in Fig. 2 . Further examination revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090466
EISBN: 978-1-62708-218-1
... Abstract A production lot of mechanical hinges used in an automotive application had failed during incoming quality-control routine actuation testing. A change in part supplier had taken place between the approval of the prototype parts that performed acceptably and the receipt of the first lot...
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
... 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 fabrication, failure of the bellows in service appears to be inevitable with this type...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001017
EISBN: 978-1-62708-219-8
... these controls were set, however, the procedure was automatic. Each welded length of pipe was subjected to a proof pressure approximately twice the specified design pressure and two-thirds of the approximate yield point of the parent metal. No failures or leakage were observed during proof testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001631
EISBN: 978-1-62708-222-8
... testing. Engineering expert litigation Manufacturing standards Products liability Quality control Metal Brittle fracture Often the first reaction of an expert or lawyer receiving a case from a client is simply a question or two. How can a strategy be developed to work this issue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001699
EISBN: 978-1-62708-234-1
... of corrosion monitoring and poor water quality. Pipe replacement and a regular water testing program were recommended. Monitoring Water pipelines Water treatment Steel pipe Uniform corrosion Crevice corrosion Biological corrosion A shopping mall in South Carolina was originally constructed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001029
EISBN: 978-1-62708-214-3
..., class 2, grade C and were not 100% radiographically inspected. The chemical composition requirements for A356 aluminum alloy were met (nominal composition, Al-7.0Si-0.35Mg). The actuator castings were being torque tested to a torque of 365 N . m (3240 lbf . in.) during static quality control testing...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001268
EISBN: 978-1-62708-215-0
.... The resultant increase in mechanical properties of the re-heat-treated material indicated that the original heat treatment was not performed correctly. The failure was attributed to improper heat treatment. Recommendations focused on more stringent quality control of the heat-treat operations. Reference...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006828
EISBN: 978-1-62708-329-4
... of the material, joint design, prebraze cleaning, brazing procedures, postbraze cleaning, and quality control. Factors that must be considered include brazeability of the base metals; joint design and fit-up; filler-metal selection; prebraze cleaning; brazing temperature, time, atmosphere, or flux; conditions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001701
EISBN: 978-1-62708-219-8
... by oxygen concentration cells and oxygen-pitting related corrosion. Both types of corrosion are due to the poor quality of the water and the lack of corrosion control in the water system. Water chemistry Water heaters Water pipelines Water treatment ASTM A106 UNS K03006 Crevice corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090430
EISBN: 978-1-62708-222-8
... a consumer product exhibited an apparent surface defect. The handle had been injection molded from a medium-viscosity-grade ABS resin. The anomalous appearance was objectionable to the assembler of the final product and resulted in a production lot being placed on quality-control hold. Tests and Results...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
... such as polyethylene. For more complex products in which specimens are difficult to extract, the ball-and-pin impression test, ISO 4600, can be used. This is a simple quality-control test in which a series of holes of a specific diameter are drilled into the material, and oversized balls or pins of different sizes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0090965
EISBN: 978-1-62708-221-1
... fracture morphology remained. However, the investigation supported the conclusion that the crusher frame failed via brittle overload fracture, likely due to excessive service stresses and substandard mechanical properties. Recommendations included additional quality-control measures to provide better...
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
..., it is not yet an economical proposition to examine every welded detail by this means. As these examples show — no matter how good the reputation of the manufacturer, and the excellence and vigilance of his inspection and quality control staff — examples of criminal malpractice which could lead to serious...
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
... and fabrication sources of failure, addresses the key factors in production and quality control, and explains failure analysis of AM parts. binder jet sintering directed energy deposition failure analysis metal products metallurgical characteristics powder bed fusion quality assurance ADDITIVE...
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
... already in the field to identify and reject those containing vermicular graphite. In addition, metallographic control standards were suggested for future production lots. Graphite structure Graphitization Guns Pistons Sound castings Ultrasonic testing Vermicular graphite D7003 Brittle...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
... in the tube, while low ratios lead to geometric inaccuracies due to high constraint for flow in the axial direction. These instabilities, waviness bulges, and ovality are related to control of pressure variables, not the material quality and, hence, should not be considered metallurgical defects. Cracking...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001283
EISBN: 978-1-62708-215-0
.... It was recommended that the supplier improve melting techniques, including the quality of master alloys, to avoid formation of harmful segregation, oxide films, and gas voids. It was also recommended that the forging shop perform additional quality control checks by ultrasonic testing of the extruded forging stock...