A preliminary evaluation of irradiation damage in model alloys by electric properties based techniques

Acosta, B.; Filippo, Sevini; Debarberis, L.

doi:10.1016/j.ijpvp.2004.01.005

Cited by 11 publications

(3 citation statements)

References 4 publications

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“…The CRPs [9] and MNPs [1], first predicted by Odette, have been identified and characterized by a combination of experimental techniques, including small angle neutron scattering (SANS) [2,[10][11][12][13], atom probe field ion microscopy (APFIM) [13][14][15][16][17][18][19], combined electrical resistance Seebeck coefficient measurements (RSC) [19][20][21], and recently, positron annihilation spectroscopy (PAS) [22][23][24][25][26]. The characteristics of the CRPs and MNPs have been studied as a function of steel composition, heat treatment, irradiation temperature, neutron flux and fluence.…”

Section: Introductionmentioning

confidence: 99%

Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels

Glade

Wirth

Odette

et al. 2006

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels

Glade

Wirth

Odette

et al. 2006

Journal of Nuclear Materials

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“…The Seebeck coefficient of a material, also known as the thermoelectric power (TEP) [2], is dependent on its composition and microstructure [3]. Consequently, a range of studies have established TEP measurements are sensitive to thermal and irradiation embrittlement [4][5][6][7][8], hydrogen and nitrogen embrittlement [9][10][11], martensite content [12][13][14], and fatigue damage [15]. The use of the technique for material characterisation therefore appears promising.…”

Section: Introductionmentioning

confidence: 99%

Improved thermoelectric power measurements using a four-point technique

Corcoran

Raja

Nagy

2018

NDT & E International

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A B S T R A C TThe Seebeck coefficient of a material is dependent on its composition and microstructure and is consequently sensitive to service related material degradation; of particular interest is the sensitivity to thermal and irradiation embrittlement which may be exploited for the material characterisation of in service components. Conventionally, thermoelectric measurements are taken using a two-point contact technique which introduces a temperature differential in the test component through a heated 'hot tip' electrode; it is argued that measurements using this methodology are sensitive to the thermal contact resistance between the component and the electrodes. An alternative three-or four-point technique is proposed where heat is introduced to the component remotely which leads to much less sensitivity to contact condition. An experiment is presented that compares the two techniques and demonstrates the improved performance of the four-point technique. Aside from the improved accuracy, the modified technique also facilitates a 'passive' implementation that could be used from continuous monitoring of components in service.

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“…TEP measurements are particularly well suited to monitoring, as they are insensitive to changes in geometry which may occur over time and interfere with the measurement. 2 TEP measurements are sensitive to thermal and irradiation embrittlement, 3,[11][12][13][14] hydrogen and nitrogen embrittlement, [15][16][17] martensite content, [18][19][20] and fatigue damage. 21 In particular, sensitivity to the coupled spinodal decomposition of ferrite and sigma phase precipitation in stainless steels 13,19,22,23 makes it a promising technique for use in nuclear power station applications.…”

Section: Introductionmentioning

confidence: 99%

Passive thermoelectric power monitoring for material characterisation

Corcoran

Nagy

2018

Structural Health Monitoring

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Monitoring deterioration of material properties is important for assessing the structural integrity of engineering components, as it may indicate susceptibility to damage. This article focusses on the example of thermoelectric power measurements, which are known to be indicative of thermal and irradiation embrittlement and may therefore act as a proxy metric for material integrity. A passive thermoelectric power–monitoring technique is proposed which is suitable for permanent installation on engineering components. In passive measurements, the active perturbation (in this case, the heating required to create a temperature gradient) is replaced by incidental perturbation from the environment. The reduction in the ‘signal’ amplitude associated with relying on incidental perturbations may be compensated by increasing the number of individual measurements, facilitated by the greatly reduced power demand of the passive modality. Experimental studies using a stainless steel tube as a test component demonstrate thermoelectric power accuracy of <0.03 μV/°C is achievable with temperature gradients of the order of 2°C; in many cases of practical importance, this is sufficient to track the anticipated changes in thermoelectric power associated with thermal degradation.

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A preliminary evaluation of irradiation damage in model alloys by electric properties based techniques

Cited by 11 publications

References 4 publications

Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels

Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels

Improved thermoelectric power measurements using a four-point technique

Passive thermoelectric power monitoring for material characterisation

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