Sintering shrinkage of WC–Co materials with bimodal grain size distributions

2005 ◽  
Vol 53 (6) ◽  
pp. 1665-1671 ◽  
Author(s):  
A. Petersson ◽  
J. Ågren
Keyword(s):  
Grain Size ◽  
Size Distributions ◽  
Grain Size Distributions ◽  
Sintering Shrinkage ◽  
Bimodal Grain Size

scholarly journals Three-Dimensional in situ Reconstructions of Microstructures with Bimodal Grain Size Distributions

2019 ◽  
Vol 25 (S2) ◽  
pp. 370-371
Author(s):  
Ashley Bucsek ◽  
Lee Casalena ◽  
Darren C. Pagan ◽  
Partha P. Paul ◽  
Yuriy Chumlyakov ◽  
...  
Keyword(s):  
Grain Size ◽  
Three Dimensional ◽  
Size Distributions ◽  
Grain Size Distributions ◽  
Bimodal Grain Size

scholarly journals Grain Growth after Intercritical Rolling

2004 ◽  
Vol 467-470 ◽  
pp. 305-310 ◽  
Author(s):  
Roumen H. Petrov ◽  
Leo Kestens ◽  
Kim Verbeken ◽  
Yvan Houbaert
Keyword(s):  
Grain Size ◽  
Size Distributions ◽  
Orientation Microscopy ◽  
Final Rolling Temperature ◽  
Responsible Mechanism ◽  
Grain Size Distributions ◽  
Intercritical Region ◽  
Final Rolling ◽  
Parent Austenite ◽  
Bimodal Grain Size

The distribution of the characteristic texture components between the ferrite grains of different size classes has been studied in a steel with 0.082%C, 1.54% Mn, 0.35% Si, 0.055%Nb and 0.078%V after different rolling schedules with a final rolling temperature above or below Ar3. Microstructures and textures were characterized by means of optical microscopy and orientation microscopy. A strong grain refining effect together with a bimodal grain size distribution was observed in the steel both after final rolling in the intercritical region or in the austenite region, close to the Ar3 d temperature. The differences in grain size were interpreted on the basis of three potentially acting mechanisms: (i) transformation- induced recrystallization, (ii) increased mobility of specific grain boundaries and (iii) fast nucleation of ferrite grains on specific sites of the parent austenite microstructure. The experimental data clearly favoured the third of these assumptions as the responsible mechanism for the observed bimodal grain size distributions.

Model-Data Comparison of High Frequency Absorption and Velocity for the Water-Saturated Granular Medium

2013 ◽  
Vol 278-280 ◽  
pp. 779-784
Author(s):  
Woo Jae Seong ◽  
Hae Sang Yang
Keyword(s):  
Grain Size ◽  
P Wave ◽  
Size Distributions ◽  
Fluid Medium ◽  
Proposed Model ◽  
Alternative Approach ◽  
Grain Size Distributions ◽  
Different Grain Size ◽  
Water Saturated ◽  
Bimodal Grain Size

Dispersion relation for the p-wave sound speed and attenuation has been described by several models based on continuum or scattering theory. As an alternative approach, this study proposes a model describing relation for the p-wave in case of elastic grain scatterers existing in background fluid medium. Dispersion relations are shown as a function of different grain size distribution and Rayleigh parameter . For quantitative analysis of the proposed model, experiments are performed using water-saturated glass beads. Two sets of experiments employing unimodal and bimodal grain size distributions are performed and used for comparison with the current proposed model.

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