Microstructural damage evolution and arrest in binary Fe–high-Mn alloys with different deformation temperatures

2018 ◽  
Vol 213 (2) ◽  
pp. 193-206 ◽  
Author(s):  
Motomichi Koyama ◽  
Takahiro Kaneko ◽  
Takahiro Sawaguchi ◽  
Kaneaki Tsuzaki
Keyword(s):  
Damage Evolution ◽  
Microstructural Damage

scholarly journals Simulation of microstructural damage evolution during very high cycle fatigue (VHCF) using the boundary element method

PAMM ◽  
2013 ◽  
Vol 13 (1) ◽  
pp. 75-76 ◽  
Author(s):  
P.-M. Hilgendorff ◽  
C.-P. Fritzen ◽  
A. Grigorescu ◽  
M. Zimmermann ◽  
H.-J. Christ
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Damage Evolution ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Microstructural Damage ◽  
Very High Cycle Fatigue ◽  
Very High ◽  
Element Method

scholarly journals Microstructural damage evolution and its effect on fracture behavior of concrete subjected to freeze-thaw cycles

2018 ◽  
Vol 27 (8) ◽  
pp. 1272-1288 ◽  
Author(s):  
Yijia Dong ◽  
Chao Su ◽  
Pizhong Qiao ◽  
LZ Sun
Keyword(s):  
Computed Tomography ◽  
Cohesive Zone ◽  
Damage Evolution ◽  
Fracture Behavior ◽  
Cohesive Zone Model ◽  
Zone Model ◽  
X Ray ◽  
Freeze Thaw ◽  
Microstructural Damage ◽  
Macro Scale

Concrete structures in cold regions are exposed to cyclic freezing and thawing environment, leading to degraded mechanical and fracture properties of concrete due to microstructural damage. While the X-ray micro-/nano-computed tomography technology has been implemented to directly observe concrete microstructure and characterize local damage in recent years, the freeze-thawed damage evolution processes and its effect on overall mechanical performance are not well understood. In this paper, the X-ray nano-computed tomography technology and micro-scale cohesive zone model are combined to quantitatively investigate microstructural damage evolution and its effect on fracture behavior of freeze-thawed concrete samples in three-point bending tests. A two-level micro-to-macro scale finite element model is developed based on computed tomography microstructural images with microcracks due to freeze-thaw cycles. The macroscopic load–deflection curves and fracture energies are simulated and compared favorably with experimental results. Simulation results demonstrate that microcracks caused by freeze-thaw actions are the primary reason for degradation of concrete mechanical properties. Fracture behaviors of frost-damaged concrete with different mortar and interfacial transition zone strength and fracture constants are also simulated and discussed. The combined X-ray nano-computed tomography technology and cohesive zone model proposed is effective in characterizing fracture behavior of concrete and capturing freeze-thaw cycle-induced microstructural damage evolution and its effect on fracture process of concrete.

Microstructural Damage Evolution in "Triple-Beam" Ion-Irradiated Fe-10% Cr*

1982 ◽  
Vol 40 ◽  
pp. 588-589
Author(s):  
L. L. Horton ◽  
J. Bentley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Materials ◽  
Damage Evolution ◽  
Objective Lens ◽  
Pole Piece ◽  
Graaff Accelerator ◽  
Microstructural Damage ◽  
Transmission Electron ◽  
Accelerator System

The evolution of the damage microstructures which result from fusion environment irradiation of Fe— 10% Cr has been characterized with transmission electron microscopy (TEM). Disk specimens (3 mm diameter) were bombarded at 850 K in the ORNL dual Van de Graaff accelerator system with a “triple beam” of He+, D+, and 4 MeV Fe++ to fluences of 0.3, 1, 3, 10, 30 and 100 dpa with 10 at. ppm He/dpa and 41 at. ppm D/dpa. The specimens were prepared for TEM using standard electrolytic “sectioning” and “back-thinning” techniques with a sectioning depth of 0.9 μm. TEM examination was performed at 120 kV in a JEM 120C equipped with a special objective lens pole-piece (AMG) for the observation of magnetic materials.

Quantitative damage evolution in dynamic incipiently failed Ti-6Al -4V

2000 ◽  
Vol 10 (PR9) ◽  
pp. Pr9-729-Pr9-734
Author(s):  
D. A.S. Macdougall ◽  
W. R. Thissell
Keyword(s):  
Damage Evolution

Modelling of microstructure and damage evolution in Sn‐Pb solder

2006 ◽  
Vol 18 (1) ◽  
pp. 44-51
Author(s):  
Y. Wei ◽  
C.L. Chow ◽  
H.E. Fang ◽  
W.Y. Lu ◽  
J. Lim
Keyword(s):  
Damage Evolution
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