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process control

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089258
EISBN: 978-1-62708-218-1
... the OD of the sleeve were revealed by scanning electron microscopy of the broken-open crack. It was revealed by analysis that during the hydroforming process, heavy biaxial strains were imparted to the sleeve wall. It was interpreted that when combined with the heavy strains inherently present...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
... Abstract Hardenability evaluation is typically applied to heat treatment process control, but can also augment standard metallurgical failure analysis techniques for steel components. A comprehensive understanding of steel hardenability is an essential complement to the skills...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
.... The sintered porous coating exhibited multiple regions where fatigue fracture of the neck region occurred, as well as indications that the sintering process did not fully incorporate the beads onto the substrate. Better process control during sintering and use of subsequent heat treatments to ensure a bimodal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001909
EISBN: 978-1-62708-235-8
... resulted in sheared welds and unacceptably low loads. Figure 1 shows an example of a sheared plug weld. Note the burning that occurred on the underside of the parent material, indicating a lack of weld process control. The process was improved, however, and subsequent peel testing revealed a lower than...
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
... contributed to the fatigue process. How Failure Could Have Been Prevented Better processing controls during the etching and plating procedures would have lessened the possibility of defective plating and subsequent stripping. The post-plating baking which reduced the mechanical properties should...
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
... at specific locations on a build platform or part. The materials in the AM jetting processes involved controlled deposition of curable polymers or atomized melt (material jetting) or powder deposition with binder resins (binder jetting). Other AM technologies emerged with the development of selective laser...
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
... patterns Elimination of casting porosity and breakup of macrosegregation patterns Improved toughness and/or fatigue resistance due to grain flow and fibering Burnished surface and controlled surface quality However, the beneficial factors of deformation processing can become a potential...
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
... industry corrosion resistance gas turbine components heat exchangers material selection power generation industry process control refractories structural ceramics REFRACTORY MATERIALS are used in various industrial applications to line the interior of a multitude of vessels (mainly made...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... influences on properties. The field of heat treatment includes a large number of thermal processes that have been developed to enhance primary design properties such as strength, wear resistance, toughness, ductility, corrosion resistance, and so on. These processes require engineering controls to ensure...
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 Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... or control the effects of all important failure modes. Single-point failures identified during the analysis should be uniquely identified so as to maintain their visibility throughout the design process. The FMEA Process The FMEA methodology is based on a hierarchical, inductive approach to analysis...
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
.... The purpose of this investigation was to determine the probable cause of failure. The submerged-arc welding process used produced a weld from the outside surface. A full penetration weld was intended. Linear speed and other usual welding variables were under the control of the operator. Once...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... propagation were needed be controlled. It was concluded that improved steel processing procedures, chiefly hot-working temperature and deformation control, were also required to optimize microstructure and properties. Chemical composition Ductile brittle transition Gas pipelines Steel making API 5L...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001732
EISBN: 978-1-62708-218-1
... to permit adequate annealing of all subsequent experimental links. Had this been a production component, quality control would have been altered so that they could initiate reasonable processing controls. Fig. 5 Actuating link failure. Evaluation of Corrective Action A new group of 12 lock...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0092148
EISBN: 978-1-62708-235-8
... retained austenite in the failed cylinder to transform to martensite. The increase in volume resulted in sufficient size distortion to cause interference between the cylinder and the spool, seizing, and loss of flow control. The failed parts had been carburized in a process in which the carbon potential...
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
... Abstract Failure analysis is an investigative process that uses visual observations of features present on a failed component fracture surface combined with component and environmental conditions to determine the root cause of a failure. The primary means of recording the conditions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... process with a backing strip. The backing was back gouged off, and the weld was completed from the inside with E8018-C3 electrodes by the shielded metal arc process. Striations of the type normally associated with progressive or fatigue-type failures including beach marks that allowed tracing the origin...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006924
EISBN: 978-1-62708-395-9
... thermosetting resins as well as the curing process. Then, the techniques to characterize the physical properties of cured thermosets and composites are presented. Several examples of stress-strain curves are shown for thermosets and thermoplastic polymers. differential scanning calorimetry dynamic...
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
... control, switch to proportional, integral, and derivative control Check for process heating/cooling issues due to volatilization/vaporization of low-molecular-weight by-products or additives Steady, slow decrease in output Clogged screen pack or leakage along the screw flight Clean screen...
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
... of the mandrel, and proper wall thickness is achieved by control of the gap between the rollers and the mandrel. Flow forming can be divided into two distinct processes: forward flow forming and reverse flow forming. In forward flow forming, roller feed and deformed material movement are in the same...