Multiple-Mist Regions on Glass Fracture Surfaces

2009 ◽  
pp. 259-259-12 ◽  
Author(s):  
AIA Abdel-Latif ◽  
RC Bradt ◽  
RE Tressler
Keyword(s):  
Fracture Surfaces ◽  
Glass Fracture

Scanning tunneling microscope observations of metallic glass fracture surfaces

1993 ◽  
Vol 8 (10) ◽  
pp. 2543-2553 ◽  
Author(s):  
D.M. Kulawansa ◽  
J.T. Dickinson ◽  
S.C. Langford ◽  
Yoshihisa Watanabe
Keyword(s):  
Fracture Surface ◽  
Metallic Glass ◽  
Metallic Glasses ◽  
Scanning Tunneling Microscope ◽  
Shear Bands ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Fracture Surfaces ◽  
Glass Fracture ◽  
Shear Instabilities

We report scanning tunneling microscope observations of fracture surfaces formed during catastrophic crack growth in three metallic glasses: Ni56Cr18Si22B4, Co69Fe4Ni1Mo2B12Si12, and Fe78B13Si9. Macroscopically, the first two glasses fail along a slip band formed during loading and display a characteristic, μm-scale pattern of vein-like ridges; in contrast, Fe78B13Si9 displays little slip prior to fracture, and its fracture surface shows a μm-scale chevron pattern of steps. STM observations of fracture surfaces of all three materials show nm-scale grooves. The grooves in Co69Fe4Ni1Mo2B12Si12 are especially prominent and display stepped edges which we attribute to the intersection of shear bands with the surface. STM observations of the vein-like features on Ni56Cr18Si22B4 also show stepped edges. We attribute the vein features to the interaction of adjacent crack fingers in which the material between adjacent fingers fails in plane stress. The origin of the grooves is uncertain, but may be due to other shear instabilities along crack fingers.

Spiral Dislocations on Glass Fracture Surfaces

1960 ◽  
Vol 31 (8) ◽  
pp. 1416-1421 ◽  
Author(s):  
W. C. Levengood ◽  
T. S. Vong
Keyword(s):  
Fracture Surfaces ◽  
Glass Fracture

Nanometer-scale observations of metallic glass fracture surfaces

1994 ◽  
Vol 176 (1-2) ◽  
pp. 411-415 ◽  
Author(s):  
Yoshihisa Watanabe ◽  
Yoshikazu Nakamura ◽  
J.T. Dickinson ◽  
D.M. Kulawansa ◽  
S.C. Langford
Keyword(s):  
Metallic Glass ◽  
Nanometer Scale ◽  
Fracture Surfaces ◽  
Glass Fracture

Glass fracture surfaces seen with an atomic force microscope

1997 ◽  
Vol 358 (1-2) ◽  
pp. 349-351 ◽  
Author(s):  
C. Wünsche ◽  
Edda Rädlein ◽  
Günther Heinz Frischat
Keyword(s):  
Atomic Force Microscope ◽  
Fracture Surfaces ◽  
Atomic Force ◽  
Glass Fracture

Microstructure of the mist zone on glass fracture surfaces

1968 ◽  
Vol 17 (149) ◽  
pp. 899-910 ◽  
Author(s):  
J. W. Johnson ◽  
D. G. Holloway
Keyword(s):  
Fracture Surfaces ◽  
Glass Fracture

New Dimensions in Freeze-Etching

1969 ◽  
Vol 27 ◽  
pp. 202-203 ◽  
Author(s):  
Russell L. Steere ◽  
Michael Moseley
Keyword(s):  
Fracture Surfaces ◽  
Aluminum Specimen ◽  
Specimen Holder ◽  
Freeze Etching ◽  
The Right

A redesigned specimen holder and cap have made possible the freeze-etching of both fracture surfaces of a frozen fractured specimen. In principal, the procedure involves freezing a specimen between two specimen holders (as shown in A, Fig. 1, and the left side of Fig. 2). The aluminum specimen holders and brass cap are constructed so that the upper specimen holder can be forced loose, turned over, and pressed down firmly against the specimen stage to a position represented by B, Fig. 1, and the right side of Fig. 2.

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