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process qualification

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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 Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... Hardware by Laser Powder Bed Fusion Metallurgical Processes ,” MSFC-STD-3716, NASA, Marshall Space Flight Center , Oct 18 , 2017 40. “ Specification for Control and Qualification of Laser Powder Bed Fusion in Metals ,” MSFC-STD-3717, NASA, Marshall Space Flight Center , Oct 18 , 2017 41...
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
... of the heated band suggested that the weld had been made by the oxy-gas process. A lack of root fusion over most of its length was evident. Examination of the fracture faces, which were of crystalline appearance indicative of brittle behavior, indicated incomplete fusion of the weld root. Microscopic...
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
... reliability must be beyond question, it is necessary to give adequate consideration to all the relevant factors, e.g., weldability of the base material, shape of the weld preparation and the welding procedure which involves choice of the welding process, electrodes, size of runs, electrical parameters and pre...
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
... of the base material, shape of the weld preparation and the welding procedure which involves choice of the welding process, electrodes, size of runs, electrical parameters and pre- or post-heat. The adequacy of the procedure is then demonstrated by a practical test involving both NDT and destructive test...
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.power.c9001639
EISBN: 978-1-62708-229-7
... Wall Crawler Procedure and Equipment Qualification Thickness Mapping Weld Inspection and Crack Detection Ultrasonic Flaw Sizing Through-Wall Bleed-Out Tank Design Inspection Personnel Field Tank Inspections Summary The technology, data, and analysis presented...
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
... to meet the needs of a new process or a new design Substitution for an existing design to improve reliability and performance To tackle the first situation, the essential qualifications for a new case are the thermal, chemical, and mechanical constraints to be met. Definition of those constraints...
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
... in. The welding orientation represents a combination of geometries 11 and 12, as characterized in Ref 1 . The 3.25 in. flange was beveled to comply with American Welding Society (AWS) D1.1-00 2 requirements, and the joining was completed with multiple weld passes using the flux cored arc welding (FCAW) process...
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
... a prolongation of each forging or from the prolongation from one sample forging or from a qualification forging. Mechanical properties for additive-manufacturing-processed parts are still a work in progress but, if done, are usually taken from test bars fabricated separately during the build. The question...
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
... of residues virtually impossible. The external surfaces of the chamber are plated with electrolyses nickel. Since the process involves dipping the chamber into the plating bath, the surfaces between the heat shields and the dome in the area around the exhaust port are also plated. Fig. 1 Cartridge...
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 is located on the helicopter as shown in Figure 1 . This figure also shows the location of the failure (indicated by arrow). The component is forged from maraging 300 steel, and after heat treatment and final machining, is cadmium coated using a vacuum deposition process. The part is subsequently painted...
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
...Abstract Abstract Mechanical springs are used in mechanical components to exert force, provide flexibility, and absorb or store energy. This article provides an overview of the operating conditions of mechanical springs. Common failure mechanisms and processes involved in the examination...
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
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006809
EISBN: 978-1-62708-329-4
...Abstract Abstract A detailed fracture mechanics evaluation is the most accurate and reliable prediction of process equipment susceptibility to brittle fracture. This article provides an overview and discussion on brittle fracture. The discussion covers the reasons to evaluate brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001596
EISBN: 978-1-62708-225-9
... that would qualify individual lots of springs before system level testing. System level testing takes in excess of six months for qualification, whereas a spring endurance test should take only a week to complete. In determining the root cause analysis of the broken spring, a fishbone diagram...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... in the repair process. Enhanced field fabrication methods can be expected to result in even better reliability. Experiments performed by the Japanese suggest that eliminating the axial gap makes socket-welded joints more tolerant of fatigue, however the ASME Boiler and Pressure Vessel Code, §III, requires...
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
...; conditions of the faying surfaces; postbraze cleaning; and service conditions. This article focuses on the advantages, limitations, sources of failure, and anomalies resulting from the brazing process. It discusses the processes involved in the testing and inspection required of the braze joint or assembly...
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
... element applications in piping and pressure vessel analysis, impact analysis, and microelectronics. The article describes the steps involved in the design process using the FEA. It concludes with two case histories that involve the use of FEA in failure analysis. failure analysis finite element...