Significantly enhanced crack blunting by nanograin rotation in nanocrystalline materials

2018 ◽  
Vol 151 ◽  
pp. 19-23 ◽  
Author(s):  
Jianjun Li ◽  
Shaohua Chen ◽  
George J. Weng
Keyword(s):  
Nanocrystalline Materials ◽  
Crack Blunting

Effect of dislocation–GB interactions on crack blunting in nanocrystalline materials

2014 ◽  
Vol 592 ◽  
pp. 128-135 ◽  
Author(s):  
Lu Wang ◽  
Jianqiu Zhou ◽  
Shu Zhang ◽  
Hongxi Liu ◽  
Shuhong Dong
Keyword(s):  
Nanocrystalline Materials ◽  
Crack Blunting

Strong crack blunting by shear-coupled migration of grain boundaries in nanocrystalline materials

2014 ◽  
Vol 84-85 ◽  
pp. 51-54 ◽  
Author(s):  
Jianjun Li ◽  
Shaohua Chen ◽  
Xiaolei Wu ◽  
A.K. Soh
Keyword(s):  
Grain Boundaries ◽  
Nanocrystalline Materials ◽  
Crack Blunting

Effect of nanoscale twin and dislocation pileup at twin boundary on crack blunting in nanocrystalline materials

2017 ◽  
Vol 228 (10) ◽  
pp. 3483-3495 ◽  
Author(s):  
H. B. Zhao ◽  
H. Feng ◽  
F. Liu ◽  
Y. W. Liu ◽  
P. H. Wen
Keyword(s):  
Twin Boundary ◽  
Nanocrystalline Materials ◽  
Dislocation Pileup ◽  
Crack Blunting

Factors Influencing the Fatigue Behavior of Ferrous Laminates

1987 ◽  
Vol 109 (3) ◽  
pp. 244-251 ◽  
Author(s):  
J. Wittenauer ◽  
O. D. Sherby
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Carbon Steel ◽  
Fatigue Behavior ◽  
Layered Material ◽  
Factors Influencing ◽  
Ultrahigh Carbon Steel ◽  
Processing History ◽  
Crack Blunting ◽  
Similar Processing

Laminates based on ultrahigh carbon steel were prepared and found to exhibit enhanced fatigue life as compared to a monolithic reference material. This result was achieved through the insertion of weak interlaminar regions of copper into the layered material during preparation of the laminates. The presence of these regions allowed for the operation of a delamination mechanism in advance of the propagating fatigue crack. The result was interlaminar separation and associated crack blunting. Stress-life curves show that an increase in life by as much as a factor of four is achieved for these materials when compared to monolithic specimens of similar processing history.

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