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dimensional control

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Published: 15 January 2021
Fig. 29 Computer-controlled digital microscopic three-dimensional Z -stack image of exemplar crankshaft fracture with light-emitting diode ring light illumination More
Image
Published: 15 May 2022
Fig. 30 Computer-controlled digital microscopic three-dimensional Z-stack image of exemplar crankshaft fracture with light-emitting diode ring light illumination More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001359
EISBN: 978-1-62708-215-0
.... Pertinent Specifications The blades were made of titanium alloy IMI 550, with a nominal composition of 4% Al, 4% Mo, were manufactured by the closed-die forging process. Targeting bosses flash buttons at the extremities of the blades serve as reference points for dimensional control and are later...
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
... (1020 °F) Applications The bellows act as a barrier to sodium, preventing it from contacting the moving parts of the control rod drive mechanism. Figure 1 shows the dimensional details of the bellows. The details of the position of the weld joint between the convolutes are also shown. Fig...
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
... forming Microstructure Surface finish 4130 UNS G41300 Metalworking-related failures Introduction Flow forming is a promising, economical metal forming technology that can meet the challenging requirements of high specific strength, close dimensional tolerances, and excellent surface finish...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... microstructure phase transformations quenching quench-process design residual stress retained austenite steel stress tempering HEAT TREATING—of all the various steel processing methods—has the greatest overall impact on control of microstructure, properties, residual stresses, and dimensional...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
...: for example, inhomogeneous grain size; shear bands and locally weakened structures; cold shuts, folds, and laps; flow-through defects and improper grain flow Poor process control, materials selection, and use problems: may result in underfill, part distortion, and poor dimensional control; tool overload...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001734
EISBN: 978-1-62708-234-1
... fire on board an in-flight aircraft. The SEM showed a distinct three-dimensional view of the fracture surface with unique micro-features. Figure 1 , which shows the as-received actuator, reveals melting about two thirds of the distance from the solenoid end of the actuator arm. The part also lost...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
... crankshaft fracture photograph in Fig. 28 , and three-dimensional Z -stack image capability, as shown for the exemplar crankshaft fracture photograph in Fig. 29 . Fig. 25 Setup for computer-controlled digital microscopic examination of exemplar fractured crankshaft with light-emitting diode ring...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
... of the atoms involved). Depending on the nature of the covalent bonds, the mer units may form one-, two- (rarely), or three-dimensional molecules. For example, polyethylene is a long-chain molecule that forms when the double bond between carbon atoms in the ethylene molecule (C 2 H 4 ) is replaced by a single...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... applications. This dimensional control is accomplished by having two molds, one forming either side of the sheet. Common two-sided thermoforming approaches are plug-assisted forming ( Fig. 21c ) and matched mold forming. Increased wall thickness uniformity can also be achieved via three-step forming. The most...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... to the inside of the endcap prior to resistance spot welding in the areas shown in Fig. 1 . The top of the internal vent tube terminates at a controlled distance just below the inside top surface of the endcap/tank. The endcap/baffle/tube assembly is attached to the forward end of the tank by a gas tungsten...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006772
EISBN: 978-1-62708-295-2
... reveal important information regarding the accident. Unfortunately, loss and/or disposal of key evidence often occurs after an accident, before investigators can properly collect or document it. All of the topics discussed in this section point to the need for accident scene control. Changes...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... and the degree of crystallinity, and as a result, the molded parts may warp, the dimensional stability of the parts may be impacted, and the parts may even become brittle. A scientific approach to processing demands rigorous and accurate control of process parameters and repeatability. As opposed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001093
EISBN: 978-1-62708-214-3
... traceable to a poorly controlled manufacturing process, such as heat treating (quench cracking) or chemical plating (hydrogen embrittlement). In this instance, delayed cracking caused by hydrogen embrittlement was initially suspected, because the bolt reportedly had passed a magnetic particle inspection...
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
... the work area, and the process is repeated to create a solid 3D component. The advantages of this system include its ability to produce high-resolution features, internal passages, and maintain dimensional control. Lasers are typically ~100 W neodymium-doped yttrium-aluminum-garnet (Nd:YAG) lasers...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006851
EISBN: 978-1-62708-395-9
...-emitting diode ring light illumination Fig. 30 Computer-controlled digital microscopic three-dimensional Z-stack image of exemplar crankshaft fracture with light-emitting diode ring light illumination Digital Light Optical Metallographic Photography Light optical metallography is often...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001334
EISBN: 978-1-62708-215-0
.... The inner surface exhibited a uniform brown corrosion product. There was no indication of preferential deposition. Dimensional measurements at different locations showed the wall thickness to vary between 1.2 and 1.3 mm (0.047 and 0.051 in.). Loss of thickness was found only near the puncture. The tube...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001298
EISBN: 978-1-62708-215-0
... spar A single corrosion pit, 0.38 mm (0.015 in.) deep, led to a fatigue failure of the spar The failure initiated on the pylon side of the blade. Dimensional analysis of the spar near the failure revealed measurements within engineering drawing tolerances. Though corrosion pitting was present...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001600
EISBN: 978-1-62708-217-4
... be controlled especially at the critical areas of the web, to assure complete coverage and proper compressive residual stresses. Shot peening 7075 UNS A97075 Fatigue fracture Background Four helicopter main support bridges were shipped to the Army Research Lab (ARL) for analysis. The parts had...