On “An Unusual Star” by Nakagawa et al

Minakawa, Osamu; Nishimura, Jun

doi:10.1143/jpsj.9.137

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…[31][32][33][34][35][36] In order to understand the effect of orientation of the grains on ductility, it is important to understand the effect of travel speed on weld pool shape and orientation of the grains.…”

Section: Orientation Of the Grainsmentioning

confidence: 99%

CO 2 and Nd:YAG laser beam welding of 6111-T4 aluminum alloy for automotive applications

Ramasamy¹,

Albright

2000

Journal of Laser Applications

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CO 2 laser beam welding of AM60 magnesium-based alloyThere are two important trends that are currently taking place in the forming of sheet metal into automotive body components. One of these trends is the substitution of aluminum sheet alloys for steel. The other trend is the use of tailor welded blanks. Currently, there exists strong motivation for research to combine these technologies in order to produce tailor welded aluminum blanks. The focus of the current study is to develop welding procedures for autogenous CO 2 ͑continuous mode͒ and Nd:YAG ͑continuous and pulsed mode͒ laser beam welding of 6111-T4-aluminum alloy. The mechanical and microstructural characteristics of the welded joints were evaluated using tensile tests, microhardess tests, optical microscopy, and chemical analysis. Results indicate that this alloy can be autogenously laser welded with full penetration, minimum surface discontinuities and little if any loss of magnesium through vaporization from the fusion zone. The total elongation ͑all weld metal͒ in the longitudinal direction for the laser welds made using 3 kW CO 2 and 2 kW pulsed Nd:YAG show a decreasing trend with increasing travel speed. Studies indicate that the decreasing trend is probably due to the combination of two factors: orientation of the grains with respect to the loading direction and solidification cracking. The total elongation ͑all weld metal͒ of the laser welds made using 5 kW CO 2 and 3 kW cw Nd:YAG did not show a consistent trend with travel speed. The main reason for this is solidification cracking. The welds made with 2 kW pulsed Nd:YAG with travel speed between 42 and 63 mm/s displayed the highest total longitudinal elongation ͑20.78% to 16.45%͒, compared to the base metal values of 27.8%. A very interesting observation was that the weld surface condition did not have any effect on the ductility of the 6111-T4-aluminum alloy studied in this investigation.

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Section: Orientation Of the Grainsmentioning

confidence: 99%

CO 2 and Nd:YAG laser beam welding of 6111-T4 aluminum alloy for automotive applications

Ramasamy¹,

Albright

2000

Journal of Laser Applications

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“…The ratios of iron atoms located at the respective coordination sites N4, N5 and N6 are also tabulated in this table. When Table 5 shows numbers of cobalt ions occupying the 4-, 5-and 6-fold sites, together with those determined with the neutron diffraction assisted with the Rietveld analysis with a resolution and a precision [11] better than the previous work [7]. The present occupation numbers were determined by the analyses of the Co-K edge EXAFS.…”

Section: Cobalt and Iron K-edges Exafsmentioning

confidence: 95%

“…Occupation numbers of cobalt ions in respective sites in a unit cell of Z-type ferrites obtained by neutron diffraction[11], Co-K and Fe-K edge EXAFS analysesFig. 7.…”

mentioning

confidence: 99%

XAFS study on site occupation of cobalt and iron in Z-type ferrite, Ba3Co2−xFe24+xO41

Nakagawa¹,

Yuya²,

Tachibana³

et al. 2005

Journal of Magnetism and Magnetic Materials

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“…[2] SCD usually occurs shortly after the onset of non-specific symptoms; given the little time available for an effective intervention, SCD is often fatal. Some studies have shown that [3][4][5][6][7][8] obesity, smoking, coronary heart disease, and high blood pressure are risk factors for SCD. However, the types of intervention that may prevent SCD remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Physical activity and risk of sudden cardiac death in individuals at high risk for cardiovascular disease

Qing¹,

Li²,

et al. 2021

Medicine

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Background: Regular physical exercise is recommended for lowering the risk of coronary events and all-cause mortality. However, there is a variety of exercise options, and their relative effectiveness and hierarchy remain unclear. Herein, we present a systematic review and meta-analysis protocol that aims to compare the impact of different types of physical activity on the risk of sudden cardiac death. Methods and analysis: English language articles reporting on randomized controlled trials will be searched in MEDLINE, Cochrane Library, CINAHL, and PubMed databases by two reviewers. A snowball approach will be used for literature retrieval. Reviewers will independently screen the literature, extract data, evaluate study quality and risk of bias, and perform a meta-analysis. In the presence of heterogeneity, a random effects model will be used for meta-analysis; otherwise, a fixed effect model will be used. Ethics and dissemination: This study is a secondary analysis and does not require ethical review. The results of this study will be disseminated through peer-reviewed publications, journals, and academic conferences and other forms of exchange. Systematic review registration number: INPLASY202140033

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On “An Unusual Star” by Nakagawa et al

Cited by 3 publications

References 2 publications

CO 2 and Nd:YAG laser beam welding of 6111-T4 aluminum alloy for automotive applications

CO 2 and Nd:YAG laser beam welding of 6111-T4 aluminum alloy for automotive applications

XAFS study on site occupation of cobalt and iron in Z-type ferrite, Ba3Co2−xFe24+xO41

Physical activity and risk of sudden cardiac death in individuals at high risk for cardiovascular disease

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