Interaction processes between vacancies and dislocations in molybdenum in the temperature range around 0.3 of the melting temperature

Zelada-Lambri, G.I.; Lambri, O.A.; Bozzano, Patricia B.; Garcı́a, J.A.; Celauro, Clara

doi:10.1016/j.jnucmat.2008.07.023

Cited by 9 publications

(44 citation statements)

References 35 publications

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“…In contrast, the peak at high-T was related to movement of dislocations controlled by the formation and diffusion of vacancies assisted by the dislocation movement [1,3]. The damping response in the MS tests is in agreement with that exhibited by the ER, DTA (Fig.…”

Section: Resultssupporting

confidence: 82%

“…Deformed 149 samples present a damping peak whose intensity results smaller than in 110 samples. In addition, the irradiated 149 sample (during 20 hours) presents similar behaviour to the non-irradiated one [1]. In all irradiated samples, the damping peak practically disappears when the sample is vibrated for a few hours at 1250 K. A new re-irradiation at RT during 10 hours and subsequent annealing at 973 K for both 110 and 149 samples, restore the peak during the cooling run.…”

Section: Resultsmentioning

confidence: 57%

“…For the 149 samples, this is enough to achieve the condition of single slip, as revealed by TEM studies and the fact that similar deformation produced single slip before [1,2]. After plastic deformation samples were irradiated with neutrons (dose < 10 −5 dpa) at RT, at the nuclear reactor RA-4, UNR-CNEA, Argentina [1]. The details for MS, ER, DTA, TEM and SANS (D11, ILL, Grenoble, France) measurements are given elsewhere [1,3].…”

Section: Methodsmentioning

confidence: 98%

“…The 110 single crystals were stretched 3% at RT and 149 samples were stretched 5% at RT. For the 149 samples, this is enough to achieve the condition of single slip, as revealed by TEM studies and the fact that similar deformation produced single slip before [1,2]. After plastic deformation samples were irradiated with neutrons (dose < 10 −5 dpa) at RT, at the nuclear reactor RA-4, UNR-CNEA, Argentina [1].…”

Section: Methodsmentioning

confidence: 99%

“…After plastic deformation samples were irradiated with neutrons (dose < 10 −5 dpa) at RT, at the nuclear reactor RA-4, UNR-CNEA, Argentina [1]. The details for MS, ER, DTA, TEM and SANS (D11, ILL, Grenoble, France) measurements are given elsewhere [1,3].…”

Section: Methodsmentioning

confidence: 99%

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Dislocations and point defects in neutron irradiated single crystalline Mo at elevated temperatures

Lambri

Cuello

Zelada-Lambri

et al. 2011

J. Phys.: Conf. Ser.

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Abstract. At temperatures of about 0.3 Tm, the mobility of dislocations out of thermodynamical equilibrium is controlled by the agglomerates of defects reducing their mobility. Annealing at T > 973 K is needed for dissolving the agglomerates, allowing the dislocations start their movement. In this work we have related the results of mechanical spectroscopy, transmission electron microscopy, electrical resistivity, differential thermal analysis and small angle neutron scattering, as obtained in deformed and neutron irradiated Mo single crystals. IntroductionNuclear materials are exposed to external stresses and at the same time to irradiation and temperature. Because of that, it is of great importance to understand the behaviour of the defects produced as a function of temperature, in order to predict the long time behaviour of these materials. In the present work the interaction processes between dislocations and point defects, from room temperature (RT) up to 30% of the melting temperature, i.e. 0.3 T m are studied. We have related the results of mechanical spectroscopy (MS, internal friction or damping measurements), transmission electron microscopy (TEM), electrical resistivity (ER), differential thermal analysis (DTA) and small angle neutron scattering (SANS), as obtained in deformed and neutron irradiated molybdenum single crystals.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 57%

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Dislocations and point defects in neutron irradiated single crystalline Mo at elevated temperatures

Lambri

Cuello

Zelada-Lambri

et al. 2011

J. Phys.: Conf. Ser.

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Mechanical energy losses in plastically deformed and electron plus neutron irradiated high purity single crystalline molybdenum at elevated temperatures

Zelada

Lambri

Bozzano

et al. 2012

Physica Status Solidi (a)

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Mechanical spectroscopy (MS) and transmission electron microscopy (TEM) studies have been performed in plastically deformed and electron plus neutron irradiated high purity single crystalline molybdenum, oriented for single slip, in order to study the dislocation dynamics in the temperature range within one third of the melting temperature. A damping peak related to the interaction of dislocation lines with both prismatic loops and tangles of dislocations was found. The peak temperature ranges between 900 and 1050 K, for an oscillating frequency of about 1 Hz.

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Influence of defects on the irreversible phase transition in Fe–Pd ferromagnetic shape memory alloys

et al. 2015

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Interaction processes between vacancies and dislocations in molybdenum in the temperature range around 0.3 of the melting temperature

Cited by 9 publications

References 35 publications

Dislocations and point defects in neutron irradiated single crystalline Mo at elevated temperatures

Dislocations and point defects in neutron irradiated single crystalline Mo at elevated temperatures

Mechanical energy losses in plastically deformed and electron plus neutron irradiated high purity single crystalline molybdenum at elevated temperatures

Influence of defects on the irreversible phase transition in Fe–Pd ferromagnetic shape memory alloys

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