Results 241 to 250 of about 2,088,473 (297)

Influence of grain size on the small fatigue crack initiation and propagation behaviors of a nickel-based superalloy at 650 °C

Journal of Materials Science and Technology, 2019
GH4169 at 650 °C in atmosphere was investigated by using single edge notch tensile specimens. The number of main cracks and crack initiation mechanisms at the notch surface strongly depended on the grain size. The crack initiation life accounted for more
Yun-Fei Jia, Shan-Tung Tu, Xiancheng Zhang   +2 more
exaly   +2 more sources

Heterogeneous grain initiation in solidification

Philosophical Magazine, 2006
Grain refinement in casting of aluminium alloys can be quantitatively modelled by assuming that the barrier for grain initiation on an inoculant particle is that for free growth from the particle rather than for the initial formation of the solid.
A. L. Greer, T. Quested
semanticscholar   +2 more sources

The role of grain boundaries on fatigue crack initiation - An energy approach

International Journal of Plasticity, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
M. Sangid, H. Maier, H. Sehitoglu
semanticscholar   +3 more sources

Grain boundary–slip bands interactions: Impact on the fatigue crack initiation in a polycrystalline forged Ni-based superalloy

Acta Materialia, 2015
Jonathan Cormier, Patrick Villechaise
exaly   +2 more sources

Statistical study on the effects of heterogeneous deformation and grain boundary character on hydrogen-induced crack initiation and propagation in twining-induced plasticity steels

Corrosion Science, 2021
The initiation and propagation of hydrogen-induced cracks (HICs) in twining-induced plasticity (TWIP) steels were quantificationally explored based on the HIC statistics at a macro level and a micro level by slow strain rate tensile (SSRT) with in-situ ...
Hao Fu, Xiaojun Chen, Wen Wang, Giorgio Pia, Jianliang Zhang, Jinxu Li   +5 more
semanticscholar   +1 more source

Investigating the crack initiation and propagation mechanism in brittle rocks using grain-based finite-discrete element method

, 2020
Fracturing process and possible factors influencing crack initiation, propagation and coalescence of granitic rocks are investigated using a grain-based finite-discrete element method (GB-FDEM).
Xiaofeng Li, Hong-yu Li, Lu Liu, Y. Liu, Minghe Ju, Jian Zhao   +5 more
semanticscholar   +1 more source

Diagnosis and Grading of Grain Initial Quality

IFAC Proceedings Volumes, 1997
Abstract Building up an expert system enabling initial grading of cereal grain quality is presented. The system, easily changeable, is reasoning from experts knowldege about quality deterioration during grain storage. Knowledge was represented as asbtract objects. These objects were inter-related by abstract operations, and scaled into a common space
Ndiaye, A., Péron, Ludovic, Fleurat-Lessard, Francis   +2 more
openaire   +2 more sources

On the stability of grain structure with initial Weibull grain size distribution

Materials Letters, 2003
A microstructure with a Weilbull grain size distribution (GSD) was generated and subjected to normal grain growth (NGG) by the Monte Carlo Potts method. The results show that the GSD keeps almost invariant during NGG. The Weibull function fits well the steady-state GSDs evolving from the Weibull and the Hillert distributions.
Chao Wang, Guoquan Liu
openaire   +1 more source

Economic impacts of the Black Sea Grain Initiative

Journal of Agricultural Economics, 2023
AbstractIn this research, we use econometric analysis to estimate the impacts of the Black Sea Grain Initiative on international wheat and corn prices. Using these results, we assess the economic value of the treaty to the global food system, as well as the regional distribution of the associated welfare savings.
Davood Poursina, K. Aleks Schaefer, Sidany Hilburn, Tuff Johnson   +3 more
openaire   +1 more source

Grain boundary migration initiated by diffusion

Russian Physics Journal, 1992
A review is presented of work related to two new processes which arise in crystalline materials when impurities diffuse along grain boundaries from the surface of the material: diffusion-initiated grain boundary migration and recrystallization. We analyze the conditions under which DIGM occurs, the kinetics of the process, its driving forces, and also ...
A. D. Korotaev, Yu. I. Pochivalov
openaire   +1 more source