Specimen Size Effects on Fracture Toughness of F82H Steel for Fusion Blanket Structural Material

Kim, Byung Jun; Kasada, Ryuta; Kimura, Akihiko; Tanigawa, Hiroyasu

doi:10.1007/978-4-431-53910-0_38

Cited by 2 publications

(2 citation statements)

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“…When the results from sub-size standard specimens were analysed, the effect of specimen size is inconsistent between different types of sub-size standard specimens. For CT specimens (Figure 19), some were reported to experience a size effect 159,160,163 and some were not, 203,206,207 this appears to be dependent on the material being tested. 167 Also, using alternative methods to evaluate fracture toughness parameters improves the agreement between standard and sub-size CT specimen test results.…”

Section: Fracture Testingmentioning

confidence: 99%

“…19,209 The effect of small punch test machine dimensions was investigated, it was discovered that punch diameter had a significant effect, mainly if it is too small it can cause brittle failure. 25 A possible advantage of small punch Eck and Ardell 97 Small compact tension specimens 159,160,163,[165][166][167]203,206,207 3-point bending specimens 136,137,139,143,146,162,208 Small Charpy specimens 51, 144,147,148,150,163,203 Indentation specimens 100,101,117,119 Bespoke specimens Xinping et al 169 testing, found in one study, could be that the scatter of DBTT values was approximately half of the scatter from Charpy testing. 27 DBTT shift due to helium ions causing irradiation damage was investigated using small punch specimens and it was discovered that there was essentially no effect.…”

Section: Ductile To Brittle Transition Temperaturementioning

confidence: 99%

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Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters

Kazakeviciute

Rouse

Focatiis

et al. 2021

The Journal of Strain Analysis for Engineering Design

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Small specimen mechanical testing is an exciting and rapidly developing field in which fundamental deformation behaviours can be observed from experiments performed on comparatively small amounts of material. These methods are particularly useful when there is limited source material to facilitate a sufficient number of standard specimen tests, if any at all. Such situations include the development of new materials or when performing routine maintenance/inspection studies of in-service components, requiring that material conditions are updated with service exposure. The potentially more challenging loading conditions and complex stress states experienced by small specimens, in comparison with standard specimen geometries, has led to a tendency for these methods to be used in ranking studies rather than for fundamental material parameter determination. Classifying a specimen as ‘small’ can be subjective, and in the present work the focus is to review testing methods that utilise specimens with characteristic dimensions of less than 50 mm. By doing this, observations made here will be relevant to industrial service monitoring problems, wherein small samples of material are extracted and tested from operational components in such a way that structural integrity is not compromised. Whilst recently the majority of small specimen test techniques development have focused on the determination of creep behaviour/properties as well as sub-size tensile testing, attention is given here to small specimen testing methods for determining specific tensile, fatigue, fracture and crack growth properties. These areas are currently underrepresented in published reviews. The suitability of specimens and methods is discussed here, along with associated advantages and disadvantages.

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