Wirbelstromprüfung auf interkristalline Korrosion

Mook, Gerhard; Göllner, J.; Köser, Ole; Mook, Bill; Schultze, S.

doi:10.1002/mawe.200390033

Cited by 3 publications

(5 citation statements)

References 7 publications

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“…Note also that since the discontinuity point occurs at the intersection of the charge collective mode at 2Q and phonons, the observed dispersion anomaly should change with doping; As doping increases the 2Q vector increases. This is indeed observed by neutron experiment [6] and also consistent with the doping dependence of the fundamental vector Q of the magnetic peaks [18]. These constitute an internal consistent picture for the stripe origin.…”

supporting

confidence: 84%

“…Thus this also leads to systematic changes of the 2Q vector, a fact that the experiments have found (see Fig.4 in Ref. [6]). In order to confirm our identification, further neutron experiments are desirable, in particular to find the yet-uncovered lower modes branching-out downwardly from the phonon discontinuity at 2Q.…”

mentioning

confidence: 68%

“…The phonon anomalies differ slightly in their appearance, ranging from a sharp dispersion jump to the dispersion kink. This depends on the materials; La 2−x Sr x CuO 4 (LSCO) [1,2,3] or YBa 2 Cu 3 O 6+x (YBCO) [4,5,6,7] or the focused phonon modes such as breathing mode, or bond-stretching mode, etc. This ubiquitous phenomenon for which proper explanation has not been given so far is interesting because not only it gives a clue to pairing mechanism in high T c cuprates, but more importantly it gives a key to better understanding the normal state properties with full of mysteries.…”

mentioning

confidence: 99%

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Phonon Anomalies due to Collective Stripe Modes in HighTcCuprates

2002

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Phonon anomalies observed in various high T(c) cuprates by neutron experiments are analyzed theoretically in terms of the stripe concept. The phonon self-energy correction is evaluated by taking into account the charge collective modes of stripes, giving rise to dispersion gap, or kink and shadow phonon modes at twice the wave number of spin stripe. These features coincide precisely with observations. The gapped branches of the phonon are found to be in-phase and out-of-phase oscillations relative to the charge collective mode.

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supporting

confidence: 84%

mentioning

confidence: 68%

mentioning

confidence: 99%

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Phonon Anomalies due to Collective Stripe Modes in HighTcCuprates

2002

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“…The concept, however, is limited to its application of cured composites because the probe movements could harm exposed carbon fibres of dry preforms and therefore damage the tested part beyond repair. In addition, the linear movement of the probe is bound to planar or at least large-radius structures [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Application of Eddy Current Sensor Arrays for Process Integrated Inspection of Carbon Fibre Preforms

Berger

Lanza

2017

Sensors

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This publication presents the realisation of a sensor concept, which is based on eddy current testing, to detect textile defects during preforming of semi-finished carbon fibre parts. The presented system has the potential for 100% control of manufactured carbon fibre based components, allowing the immediate exclusion of defective parts from further process steps. The core innovation of this system is given by the high degree of process integration, which has not been implemented in the state of the art. The publication presents the functional principle of the sensor that is based on half-transmission probes as well as the signals that can be gained by its application. Furthermore, a method to determine the optimum sensor resolution is presented as well as the sensor housing and its integration in the preforming process.

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“…Nickel based superalloys are widely used for components operating in hostile environments due to their ability to maintain their strength and withstand corrosion and oxidation at elevated temperatures . Hastelloy‐C276 is one variation of corrosion‐resistant NiMo superalloys and known for its strong resistance to oxidizing agents, acids and several chlorine solutions which makes it widely applied in chemical and environmental engineering as well as in oil and gas industries .…”

Section: Introductionmentioning

confidence: 99%

Surface damages and tool wear mode in end milling of hastelloy‐C276 under dry and wet conditions

Al-Falahi¹,

Fadaeifard

Baharudin

et al. 2016

Materialwissenschaft Werkst

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Hastelloy‐C276 is a nickel based superalloy that is widely used in chemical, petro‐chemical, environmental and nuclear industries due to its outstanding performance in a wide range of corrosive mediums. The superior properties of nickel based superalloys impair their machinability which increases the difficulty in obtaining a good surface finish. Because most of the components' failures are initiated from surface defects, several researchers have been concerned about surface integrity in machining aerospace superalloys particularly Inconel‐718. Due to the lack of studies done on machining corrosion‐resistant superalloys, this study aims to investigate surface damages and tool wear modes in milling Hastelloy‐C276 under dry and wet conditions. The absence of cooling and lubricating actions in dry machining resulted in the formation of craters, severe plastic deformation, voids, debris re‐deposition and materials drag. The breakage of the nucleated carbide phases resulted in the formation of nucleated cavities on the machined surface in both wet and dry machining. Adhesive tool wear was less in dry machining due to the formation of oxide layers on tool faces which suppressed the formation of built‐up edges due to the weak adhesion properties of oxide compounds which resulted in less surface roughness at vc = 50 m/min. On the other hand, the higher temperature and friction in dry machining resulted in severer tool coating delamination.

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Wirbelstromprüfung auf interkristalline Korrosion

Cited by 3 publications

References 7 publications

Phonon Anomalies due to Collective Stripe Modes in HighTcCuprates

Phonon Anomalies due to Collective Stripe Modes in HighTcCuprates

Development and Application of Eddy Current Sensor Arrays for Process Integrated Inspection of Carbon Fibre Preforms

Surface damages and tool wear mode in end milling of hastelloy‐C276 under dry and wet conditions

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