Effects of Neutron Radiation on Structural Materials.

Kangilaski, M.

doi:10.2172/4508480

Cited by 22 publications

(30 citation statements)

References 30 publications

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“…At A&, = 0.3% and 0-40/,, the behaviour is quite different: the unirradiated specimen has a plastic strain component of 015% both at the first cycle and after saturation and the irradiated specimen has no plastic component at all at this low strain range. This could explain the longer fatigue lives for irradiated material at lower strain ranges, as observed by Kangilaski [3,4]. TEM inspection of the dislocation substructure in tested specimens gives information about the microstructural mechanisms involved.…”

mentioning

confidence: 67%

“…There is only a limited amount of information available on postirradiation fatigue properties and most of it concerns materials data for engineering purposes at LMFBR core conditions : temperatures > 0-5Tm and fast neutron fluences > loz5 n m-'. Kangilaski has reported some results of fatigue tests on Type 347 stainless steel irradiated at room temperature [3,4]. The effect of irradiation on Type 347 stainless steel is to reduce fatigue life at high level of applied total strain range and increase fatigue life at low levels of total strain range.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Neutron Irradiation on Low‐cycle Fatigue and Tensile Properties of Aisi Type 304 Stainless Steel at 298 K

Vries¹,

Tjoa²,

Elen³

1979

Fatigue Fract Eng Mat Struct

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Abstract-Room temperature studies have been made of the effect of neutron damage on the mechanisms concerned with the low-cycle fatigue and tensile test behaviour of stainless steel AISI Type 304. Samples were irradiated in the HFR at Petten to a fast fluence of 5.1OZ4 n m-' (E > 0.1 MeV) at 333 K followed by mechanical testing at room temperature.The low temperature irradiation caused irradiation hardening : the 0.2 yield stress increased from 230MNm-' for the unirradiated material to a lower yield point value of 540 MN m-'. Irradiation had no significant effect on fatigue life. The loop type damage was removed by glide dislocations resulting in cyclic softening. Dislocation substructures were observed after fatigue testing : cell structures were more pronounced after fatigue testing to failure the higher the applied strain ranges.

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mentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Effects of Neutron Irradiation on Low‐cycle Fatigue and Tensile Properties of Aisi Type 304 Stainless Steel at 298 K

Vries¹,

Tjoa²,

Elen³

1979

Fatigue Fract Eng Mat Struct

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“…For the standard operating conditions of a nuclear reactor, chemical composition is more influential [45] on the process of neutron irradiation embrittlement than neutron flux [33] and irradiation temperature [28,41]. Specifically, copper, phosphorous, and nickel content are the most influential parameters [9].…”

Section: Stage 1-1: Defining the Case Studymentioning

confidence: 99%

An educational software to reinforce the comprehensive learning of materials selection

Rodríguez-Prieto

Camacho

Merayo

et al. 2017

Comp Applic In Engineering

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An educational software, called CalSev 1.0.2, has been developed for supporting the teaching in materials selection seminars. As a case study, a selection of materials for nuclear reactor pressure vessels has been chosen, because it is a representative example of the relationship between chemical composition, mechanical properties, and in-service behavior. This software has been developed to improve the students' understanding of the materials selection tasks, providing an interactive user-friendly platform that allows to modify-in real time-the content of chemical elements and mechanical requirements to obtain a materials performance evaluation. Due to its versatility, this informatics tool represents a great value for educational purposes, with special impact in blended and distance learning, by simplifying the arduous task of materials selection for a wide range of applications and promoting a collaborative working environment by easing the creation of small groups analyzing different study cases. Finally, to evaluate the functionality, interest, user-friendliness and the educational characteristics of CalSev 1.0.2, a survey among 36 undergraduate students has been carried out. K E Y W O R D Scomprehensive learning, computer-aided tool, educational support, materials selection, materialsEngineering is a practicing profession devoted to harnessing and modifying the three fundamental resources that humankind has available for the creation of all technology: energy, materials, and information [19]. In addition, nowadays, engineers need access to material attributes data and, since the quantity of data is large and the methods tedious to implement by hand, computer-based tools are necessary to enable the right selection of materials depending on the application [5].Selection of suitable materials for a given component is thus one of the hardest tasks to perform and hence, designers need to put their utmost effort in identifying the best materials with specific functionalities to fulfill the application requirements [39]. Design of components is associated with the Abbreviations: ASME B&PV, American society of mechanical engineers boiler and pressure vessels; JSME, Japanese society of mechanical engineers; KTA, Kerntechnischer Ausschuss (German nuclear commission); L e , experimental limit provided by key works; L s , standardized limit as described by the manufacturing codes; L s (Min) , minimum value of the standardized limits; L s (Max) , maximum value of the standardized limits; PWR, pressurized water reactors; RCC-MR, French code of nuclear design; RPV, reactor pressure vessels; SL/SLM, stringency level/stringency level methodology; SL (Max) , maximum stringency level; UTS, ultimate tensile strength (minimum required value); WORA, write once, run anywhere; XML, eXtensible markup language; Y p , yield point (minimum required value); σ max , maximum standard deviation.Comput Appl Eng Educ. 2018;26:125-140.wileyonlinelibrary.com/cae

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“…In general, metals exhibit reduced elasticity and ductility and increased hardness following irradiation. 8 Polymeric substances exhibit a wide variety of radiation effects. The formation of new chemical bonds after irradiation usually results in irreversible effects.…”

Section: Effect Of Radiation On Structural Materialsmentioning

confidence: 99%

Effects of the lunar environment on space vehicle surfaces

Pirich

Weir

Leyble

et al. 2010

2010 IEEE Long Island Systems, Applications and Technology Conference

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On the lunar surface there exists very localized and weak magnetic fields, leaving its surface essentially directly exposed to the impact of solar UV and X-rays as well as solar wind plasma and energetic particles. The lack of atmosphere results in a lunar environment charging positive in sunlight and negative in shadow regions resulting in potentials that can vary over orders of magnitude in response to changing solar illumination and plasma conditions. At the macroscale, contaminant adhesion due to van der Waals' forces are very small and can be easily perturbed by other external forces. However, at the nanoscale, van der Waals forces can be significant. Lunar regolith or dust contamination is a serious problem for equipment and vehicles for space mission applications. Dust contamination gathers on photonic sensors inhibiting motion and data gathering. In addition, devices that require transparency to light for maximum efficiency such as solar photovoltaic power systems, video cameras and optical or infrared detectors will suffer from the dust accumulation. The electrostatic charging of the lunar surface is caused by its interaction with the local plasma environment and solar UV and X-rays induced photoemission of electrons. The lunar thermal environment poses unique challenges to vehicle and sensor surfaces since it is characterized by large temperature variations, long hot and cold soak times, and reduced heat rejection capability due to the presence of the lunar regolith. Fundamental forces (van der Waals) that allow certain contamination to adhere to critical surfaces and methods are being tailored to make these surfaces suitable for this harsh environment.

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Effects of Neutron Radiation on Structural Materials.

Cited by 22 publications

References 30 publications

Effects of Neutron Irradiation on Low‐cycle Fatigue and Tensile Properties of Aisi Type 304 Stainless Steel at 298 K

Effects of Neutron Irradiation on Low‐cycle Fatigue and Tensile Properties of Aisi Type 304 Stainless Steel at 298 K

An educational software to reinforce the comprehensive learning of materials selection

Effects of the lunar environment on space vehicle surfaces

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