Analysis of the strong coupling constant $$G_{D_{s}^{*}D_{s}\phi }$$ G D s ∗ D s ϕ and the decay width of $$D_{s}^{*}\rightarrow D_{s}\gamma $$ D s ∗ → D s γ with QCD sum rules

Yu, Guo-Liang; Li, Zhenyu; Wang, Zhigang

doi:10.1140/epjc/s10052-015-3460-3

Cited by 31 publications

(11 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7, 8, 9. In fact, metal expulsion reduces the growth of the nugget during the welding process due to the heat lost with the expelled liquid metal, and the reduction of welding current and of the heat power through the joints. [28] This can justify why the samples of the test no. 7, which experienced metal expulsion, exhibit nugget sizes similar to those of the samples of the test no.…”

Section: Microstructural and Geometrical Features Of Rsw Jointsmentioning

confidence: 99%

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Spena

Maddis

Lombardi

et al. 2015

steel research int.

View full text Add to dashboard Cite

A widespread usage of new advanced high strength TWIP steels in the automotive industry is conditional on proper assembly operations by welding. Therefore, the effects of the main important process parameters on the mechanical and microstructural properties of resistance spot welded TWIP sheets are examined here. The welding parameters used were the welding current, clamping force, and welding time. An L‐9(33) orthogonally array was used to design the experimental tests. The mechanical response of the welded joints was assessed by tensile shear tests and Vickers microhardness measurements. The effects of the welding parameters on the fracture mode of the tensile shear specimens were also investigated. Some combinations of the welding process parameters guarantee acceptable tensile shear strengths for the automotive industry. The tensile shear samples mainly failed by interfacial fracture mode, while partial thickness with pull out fractures were observed in the samples when a high welding current and clamping force were used. Improper clamping force and welding current promoted excessive metal expulsions and, in turn, the formation of welding defects in the weld spots.

show abstract

Section: Microstructural and Geometrical Features Of Rsw Jointsmentioning

confidence: 99%

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Spena

Maddis

Lombardi

et al. 2015

steel research int.

View full text Add to dashboard Cite

show abstract

“…In order to explain the atomic diffusion phenomenon between the annealed sublayers in Si-rich Si x N/ Si y N multilayers, we should figure out the growth mechanism of nc-Si at first. In previous reports, Yu et al has discussed the origin of nc-Si formation in Si suboxide matrix [23]. We think the similar mechanism can be used in the Si-rich Si x N/ Si y N multilayers as shown in Fig.…”

Section: Methodsmentioning

confidence: 57%

Ostwald ripening in segregated Si_xN/Si_yN multilayers

Jiang

et al. 2016

Physica Status Solidi (a)

View full text Add to dashboard Cite

In this study, we investigate the microstructure and formation of segregated silicon nanocrystals (nc‐Si) from annealed Si‐rich SixN/SiyN multilayers. It is found the nc‐Si are separated and arranged in every sublayer with two different grain sizes. Through XPS and Raman analysis, it is discovered that Si atoms diffuse from the SiyN sublayers with smaller nc‐Si to the SixN sublayers with larger nc‐Si during annealing. Meanwhile, the grain size of SixN sublayers increase and that of SiyN sublayers decrease, compared to single layer sample. It is suggested that the atomic diffusion with grain size change phenomenon is ascribed to coalescence‐like growth followed by Ostwald ripening process, which eventually results in Si atoms transport from small Si clusters in SiyN sublayers to large Si cluster in SixN sublayers and forms the segregated nc‐Si multilayers. This work gives us better understanding of the nc‐Si growth and atomic diffusion in annealed Si‐rich multilayers.

show abstract

“…For the synthesis of [C n C 1 Im][BMB], previously reported method was used [14] and [C 10 C 1 Im][BOB] was synthesized following the method reported by Golets et al [15] Purification and physicochemical characterization of the synthesized ILs were performed according to the procedure described previously. [6,7] Each IL was dried and degassed under vacuum at 313 K for at 72 h. 1 H and 11 B NMR spectra of the studied ILs are shown in Figs S1-S6 in the Electronic Supplementary Information.…”

Section: Methodsmentioning

confidence: 99%

Dynamic properties of imidazolium orthoborate ionic liquids mixed with polyethylene glycol studied by NMR diffusometry and impedance spectroscopy

Филиппов

Azancheev

Gibaydullin

et al. 2017

Magnetic Reson in Chemistry

View full text Add to dashboard Cite

We used 1H pulsed field gradient nuclear magnetic resonance to study the self‐diffusion of polyethylene glycol (PEG) with average molecular mass of 200 and ions in mixtures of PEG with imidazolium bis(mandelato)borate (BMB) and imidazolium bis(oxalato)borate ionic liquids (ILs). The IL was mixed with PEG in the concentration range of 0–100 wt%. Within the temperature range of 295 to 353 K, the diffusion coefficient of BMB is slower than that of the imidazolium cation. The diffusion coefficients of PEG, as well as the imidazolium cation and BMB anions, differ under all experimental conditions tested. This demonstrates that the IL in the mixture is present in at least a partially dissociated state. Generally, increasing the concentration of PEG leads to an increase in the diffusion coefficients of PEG and both the ions and decreases their activation energy for diffusion. Nuclear magnetic resonance chemical shift alteration analysis showed that the presence of PEG changes the chemical shifts of both ions but in different directions. Impedance spectroscopy was used to measure the ionic conductivity of the ILs mixed with PEG. Copyright © 2017 John Wiley & Sons, Ltd.

show abstract

Analysis of the strong coupling constant $$G_{D_{s}^{}D_{s}\phi }$$ G D s ∗ D s ϕ and the decay width of $$D_{s}^{}\rightarrow D_{s}\gamma $$ D s ∗ → D s γ with QCD sum rules

Cited by 31 publications

References 61 publications

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Ostwald ripening in segregated Si_xN/Si_yN multilayers

Dynamic properties of imidazolium orthoborate ionic liquids mixed with polyethylene glycol studied by NMR diffusometry and impedance spectroscopy

Contact Info

Product

Resources

About

Analysis of the strong coupling constant $$G_{D_{s}^{*}D_{s}\phi }$$ G D s ∗ D s ϕ and the decay width of $$D_{s}^{*}\rightarrow D_{s}\gamma $$ D s ∗ → D s γ with QCD sum rules

Cited by 31 publications

References 61 publications

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Investigation on Resistance Spot Welding of TWIP Steel Sheets

Ostwald ripening in segregated SixN/SiyN multilayers

Dynamic properties of imidazolium orthoborate ionic liquids mixed with polyethylene glycol studied by NMR diffusometry and impedance spectroscopy

Contact Info

Product

Resources

About

Analysis of the strong coupling constant $$G_{D_{s}^{}D_{s}\phi }$$ G D s ∗ D s ϕ and the decay width of $$D_{s}^{}\rightarrow D_{s}\gamma $$ D s ∗ → D s γ with QCD sum rules

Ostwald ripening in segregated Si_xN/Si_yN multilayers