The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

American Society for Testing and Materials

MUCKE aims to mine a large volume of images, to structure them conceptually and to use this conceptual structuring in order to improve large-scale image retrieval. The last decade witnessed important progress concerning low-level image representations. However, there are a number problems which need to be solved in order to unleash the full potential of image mining in applications. The central problem with low-level representations is the mismatch between them and the human interpretation of image content. This problem can be instantiated, for instance, by the incapability of existing descriptors to capture spatial relationships between the concepts represented or by their incapability to convey an explanation of why two images are similar in a content-based image retrieval framework. We start by assessing existing local descriptors for image classification and by proposing to use co-occurrence matrices to better capture spatial relationships in images. The main focus in MUCKE is on cleaning large scale Web image corpora and on proposing image representations which are closer to the human interpretation of images. Consequently, we introduce methods which tackle these two problems and compare results to state of the art methods. Note: some aspects of this deliverable are withheld at this time as they are pending review. Please contact the authors for a preview.

http://ieeexplore.ieee.org/iel2/4524/12820/00592460.pdf

Image Processing

ASME boiler and pressure vessel codeの許容応力の改訂

Effects of defects on mechanical properties in metal additive manufacturing: A review focusing on X-ray tomography insights

The effect of manufacturing defects on the fatigue life of selective laser melted Ti-6Al-4V structures

The synergistic combination of mechanical fatigue stresses and environmental agents acting together can be more detrimental than that of the summation of the contributions of each mechanism acting separately. Major attempts to understand the contribution of the different agents (microstructure, chemical composition of environment, temperature, loading conditions, etc.) have been reported in the literature. Nevertheless, current knowledge is insufficient to address life estimation with a sound physical basis from the initiation of localised corrosion (such as pitting) to the estimation of crack propagation. Major simplifications and assumptions have been required in the development of life prediction methodologies. This paper reviews recent efforts made by the different interested parties, in both academia and industry, in the development of corrosion fatigue (CF) lifetime prediction procedures. The paper mainly focuses on the methodologies proposed in the literature for oil and gas, nuclear, energ...

/pdf/corrosion-fatigue-a-review-of-damage-tolerance-models-13rs9fjhve.pdf

Corrosion-fatigue: a review of damage tolerance models

https://www.research.manchester.ac.uk/portal/files/82081989/Larrosa_etal_TAFMEC_2018_303_Non_MARKED.pdf

Linking microstructure and processing defects to mechanical properties of selectively laser melted AlSi10Mg alloy

https://www.research.manchester.ac.uk/portal/files/69504678/Acepted_manuscript_CS.pdf

Simulation of stress-assisted localised corrosion using a cellular automaton finite element approach

https://research-information.bris.ac.uk/ws/files/135163123/EFM_5574_AAM.pdf

Notch bluntness effects on fracture toughness of a modified S690 steel at 150 °C

Some newer 7xxx aluminium aerospace alloys seem to be more sensitive to hydrogen environmentally assisted cracking (HEAC) in moist air than older alloys. This investigation compares the relative propensity of new (AA7449) and old (AA7075) alloys to cracking during static loading in warm, moist air (80∘C, 85% relative humidity). The surface stress was held below yield via 4-point bend tests performed using small rigs that permitted ongoing monitoring for small scale surface cracking. Both alloys exhibited HEAC but large cracks formed much more quickly in AA7449 and at lower stresses. The AA7449 alloy rapidly formed cracks at surface stresses as low as 200 MPa, where one sample nucleated a crack greater than 5 mm after only 704 h of exposure. In contrast, AA7075 samples at 250 MPa did not form macroscopic cracks greater than 5 mm within 1600 h of exposure. The importance of many microstructural features and the differences in crack morphology of both alloys were analysed using optical and electron microscopy. Crack propagation in AA7449 was found to be facilitated by the ability of cracks to grow via tortuous paths and overcome barriers, such as triple junctions and unfavourably oriented grain boundaries. This resulted in fewer, much longer cracks in this alloy for the same load and environmental conditions.

/pdf/hydrogen-environmentally-assisted-cracking-during-static-49b2e4hnw0.pdf

Nicolas Larrosa

Papers

Corrosion-fatigue: a review of damage tolerance models

Linking microstructure and processing defects to mechanical properties of selectively laser melted AlSi10Mg alloy

Simulation of stress-assisted localised corrosion using a cellular automaton finite element approach

Notch bluntness effects on fracture toughness of a modified S690 steel at 150 °C

Hydrogen environmentally assisted cracking during static loading of AA7075 and AA7449