The effect of low dose irradiation on the impact fracture energy and tensile properties of pure iron and two ferritic martensitic steels

ABSTRACTThe influence of different microstructures of La-based fully amorphous samples and its composites on the impact fracture energy were investigated and discussed. Results showed improvement in fracture energy of glassy metals with intermetallic phases, but deteriorated in the presence of dendrite phases and high volume % of crystalline phases.

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Identification of Defects In Ferritic/Martensitic Steels Induced by Low Dose Irradiation

MRS Proceedings ◽

10.1557/proc-650-r1.8 ◽

2000 ◽

Vol 650 ◽

Cited By ~ 4

Author(s):

R. Schäublin ◽

M. Victoria

Keyword(s):

Low Dose ◽

Fusion Reactor ◽

Three Dimensional ◽

Dislocation Loops ◽

Martensitic Steels ◽

Weak Beam ◽

Dose Irradiation ◽

Diffraction Mode ◽

Induced Defects ◽

Irradiation Induced Defects

ABSTRACTThe ferritic/martensitic steels which are candidates for the first wall of the future fusion reactor are investigated in TEM. While the irradiation doses expected in this reactor are in the range of 100 dpa per year, there is still a lack of knowledge on the nature of the irradiation induced defects for the low doses at which hardening is already occuring. This hardening depends strongly on the type of interaction between the moving dislocations and the defects. The early defects, which start to appear as black dots in TEM, are expected to be either three dimensional clusters of interstitials or vacancies, or dislocation loops. The nature and size of these defects is carefully studied in the F82H steel for doses ranging from about 0.5 dpa to 9 dpa and irradiation temperatures ranging from 40°C to 330°C. For that purpose, various weak beam techniques are explored at the limit of resolution of a TEM used in diffraction mode. Results are presented here for the cases of a 1.7 dpa and a 8.8 dpa irradiation.

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Impact of Low-Dose Irradiation of the Lung and Heart on Toxicity and Pulmonary Function Parameters after Thoracic Radiotherapy

Cancers ◽

10.3390/cancers13010022 ◽

2020 ◽

Vol 13 (1) ◽

pp. 22

Author(s):

Christina Schröder ◽

André Buchali ◽

Paul Windisch ◽

Erwin Vu ◽

Lucas Basler ◽

...

Keyword(s):

Pulmonary Function ◽

Low Dose ◽

Pulmonary Function Tests ◽

Thoracic Radiotherapy ◽

Dose Irradiation ◽

Dosimetric Data ◽

Diffusion Parameters ◽

Blood Gas Parameters ◽

The Impact

Objective: To assess the impact of (low) dose irradiation to the lungs and heart on the incidence of pneumonitis and pulmonary function changes after thoracic radiotherapy (RT). Methods/Material: Data of 62 patients treated with curative thoracic radiotherapy were analyzed. Toxicity data and pulmonary function tests (PFTs) were obtained before RT and at 6 weeks, at 12 weeks, and at 6 months after RT. PFTs included ventilation (e.g., vital capacity) and diffusion parameters (e.g., diffusion capacity for carbon monoxide (DLCO)). Dosimetric data of the lung and heart were extracted to assess the impact of dose on PFT changes and radiation pneumonitis (RP). Results: No statistically significant correlations between dose parameters and changes in ventilation parameters were found. There were statistically significant correlations between DLCO and low-dose parameters of the lungs (V5Gy–V30Gy (%)) and irradiation of the heart during the follow-up up to 6 months after RT, as well as a temporary correlation of the V60Gy (%) on the blood gas parameters at 12 weeks after RT. On multivariate analysis, both heart and lung parameters had a significant impact on DLCO. There was no statistically significant influence of any patient or treatment-related (including dose parameters) factors on the incidence of ≥G2 pneumonitis. Conclusion: There seems to be a lasting impact of low dose irradiation to the lung as well as irradiation to the heart on the DLCO after thoracic radiotherapy. No influence on RP was found in this analysis.

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TEMPERATURE DEPENDENCE OF THE IMPACT FRACTURE ENERGY OF THE SHORT GLASS FIBER-EPOXY COMPOSITE AND THE SHORT GLASS FIBER-UNSATURATED POLYESTER COMPOSITE

Sen i Gakkaishi ◽

10.2115/fiber.33.12_t590 ◽

1977 ◽

Vol 33 (12) ◽

pp. T590-T596 ◽

Cited By ~ 1

Author(s):

Minoru Miwa ◽

Tadashi Ohsawa ◽

Naoki Tsuji

Keyword(s):

Temperature Dependence ◽

Glass Fiber ◽

Fracture Energy ◽

Epoxy Composite ◽

Unsaturated Polyester ◽

Impact Fracture ◽

Short Glass Fiber ◽

Polyester Composite ◽

The Impact ◽

Short Glass

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The measurement method of the impact fracture energy for the adhesive joints using the Hopkinson bar

The Proceedings of the Materials and processing conference ◽

10.1299/jsmemp.2004.12.351 ◽

2004 ◽

Vol 2004.12 (0) ◽

pp. 351-352

Author(s):

Koichiro KIHARA ◽

Hiroaki ISONO ◽

Kiyomi MORI ◽

Masahiro FUNABASHI ◽

Toshio SUGIBAYASHI ◽

...

Keyword(s):

Fracture Energy ◽

Measurement Method ◽

Hopkinson Bar ◽

Adhesive Joints ◽

Impact Fracture ◽

The Impact

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Low Dose Irradiation Effects of Heat-to-Heat Variation of Type 304 Stainless Steel Creep and Tensile Properties

Effects of Radiation on Materials ◽

10.1520/stp34368s ◽

2009 ◽

pp. 597-597-22 ◽

Cited By ~ 1

Author(s):

B van der Schaaf

Keyword(s):

Stainless Steel ◽

Tensile Properties ◽

Low Dose ◽

304 Stainless Steel ◽

Irradiation Effects ◽

Dose Irradiation ◽

Type 304 ◽

Type 304 Stainless Steel

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Development of a Weight-Drop Impact Testing Method for Dental Applications

Polymers ◽

10.3390/polym12122803 ◽

2020 ◽

Vol 12 (12) ◽

pp. 2803

Author(s):

Satoru Watanabe ◽

Yoshiki Ishida ◽

Daisuke Miura ◽

Taira Miyasaka ◽

Akikazu Shinya

Keyword(s):

Impact Strength ◽

Fracture Energy ◽

Impact Test ◽

Drop Impact ◽

Impact Testing ◽

Impact Fracture ◽

Weight Drop ◽

Inner Diameter ◽

Drop Impact Test ◽

The Impact

For evaluating the impact strength of dental materials, the Izod test or Charpy test has been used, but specimen preparation for these tests is difficult due to the adjustment of a notch on them. By contrast, a weight-drop impact test does not require notched specimens. Therefore, it might be possible to measure the impact strength more accurately than conventional methods. This study aimed to establish appropriate conditions for applying the weight-drop impact test on small specimens of acrylic resin. To determine the most reliable impact fracture energy of acrylic resins, different diameters and thicknesses of PMMA resin specimens, diameters and weights of the striker, and diameters of the supporting jig were compared. For all specimen thicknesses, when the striker diameter was 6–10 mm, the impact fracture energy was constant when the inner diameter of the specimen-supporting jig was 8–10 mm. In addition, the measured E50% value was mostly equal to the median value of the impact fracture energy. Thus, for the weight-drop impact test, this method was effective for material testing of small specimens, by clearly specifying the test conditions, such as the thickness of disc-shaped specimens, the diameter of the striker, and the inner diameter of the specimen-supporting jig.

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