Densification Maps for Nano-Sized Powders

McKimpson, Marvin G.

doi:10.1080/10426919608947543

Cited by 21 publications

(17 citation statements)

References 11 publications

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“…Broadly, the indentation images are in agreement with the expectation of plastic collapse of the struts and densification of the cellular DG underneath the indenter [28][29][30]. The nanolattice remains agglomerated after release of the indent load due to the drop in surface energy associated with flocculation [31,32]. It is interesting to note that the indents made at Pmax = 500, 1000 and 1500 µN displayed in Fig.…”

supporting

confidence: 81%

Spherical indentation response of a Ni double gyroid nanolattice

Prusty

Narayan

Scherer³

et al. 2020

Scripta Materialia

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supporting

confidence: 81%

Spherical indentation response of a Ni double gyroid nanolattice

Prusty

Narayan

Scherer³

et al. 2020

Scripta Materialia

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“…In other words, precipitates coarsening or dissolution was a key driver of grain coarsening for the experimental steels. Compared with other reports, the calculated Q values of the experimental steel were in the middle level [7,16,41]. It was proved that the assumption for calculation process was reasonable.…”

Section: Kinetics Of Austenite Grain Growthmentioning

confidence: 57%

“…Various microalloying elements like aluminum, niobium, and titanium were added in the innovative material. It was attempted to increase the carburizing temperature in order to shorten the time [7]. However, one of the challenges for increasing the carburizing temperature was the abnormal grain coarsening after hot-rolling or carburiz-ing, which occurred sometimes in industrial application.…”

Section: Introductionmentioning

confidence: 99%

Grain growth behavior of niobium microalloyed 20MnCr5 steel and the effect of boron

Zhu

Wang³

et al. 2022

Materialwissenschaft Werkst

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Grain growth behaviors of niobium free, 0.021 wt. % niobium microalloyed and 0.024 wt. % niobium-0.0022 wt. % boron microalloyed 20MnCr5 steels are investigated in this paper. Optical microscopy and field-emission scanning electron microscopy were used to analyze the prior austenite grain. Transmission electron microscopy and energy dispersive spectroscopy were used to investigate the morphologies and compositions of the precipitates, respectively. The results show that adding niobium reduces the size of prior austenite grain. The addition of boron to niobium microalloyed steel, however, causes grain coarsening. Thermodynamic and kinetic calculations were performed to explain the mechanism of grain growth behavior. The results indicate that the addition of niobium and boron causes the difference in solution temperatures of aluminum nitride and niobium carbonitride precipitates. The addition of boron inhibits the precipitation of niobium carbonitride and aluminum nitride and causes precipitates coarsening. The precipitation observation backs up the calculation results.

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“…This diffusion generally results in the grain-shape change and grain coarsening. The neck growth and further grain growth caused principally by surface diffusion mechanism have been proved in both experiment and theory calculation [11][12][13]. The calculations of Wilson showed that neck growth in the sintering of Al 2 O 3 must occur primarily by surface diffusion.…”

Section: Discussion On Grain-growth Mechanismmentioning

confidence: 93%

“…The calculations of Wilson showed that neck growth in the sintering of Al 2 O 3 must occur primarily by surface diffusion. The ratio of the neck-growth rate by surface diffusion to that by boundary diffusion in alumina with 10 nm particle size was also calculated to be as high as 105 [13]. It had been demonstrated that only surface diffusion contributed to neck growth during the initial sintering stage of Al 2 O 3 at 900 8C [14].…”

Section: Discussion On Grain-growth Mechanismmentioning

confidence: 99%