Wiki for uploading microstructural and fractographic images of materials.

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WiKiMicroGraphia will announce prizes for the best uploaded micrographs under student category. Prizes will be given during the student conference "Behind the Teachers Desk (BTTD-13)" in March 2013 at CSIR-National Metallurgical Laboratory, Jamshedpur, India.

Participants of metallography contest of IIM-ATM may upload images in this site. Best microstructure will receive prizes in general category.

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FRACTURE SURFACE OF METALLIC ORTHOPAEDIC IMPLANT

This awardedmicrograph posted 11 November, 2009 - 17:25 by Pankhuri Sinha

Material (Name/Designation/Grade): 
316 stainless steel
Material Condition (Heat treatment/Service history/Source): 
fracture failure due to fatigue
Chemical Composition: 
C
0.03
Mn
2
Si
0.75
P
0.045
S
0.03
Cr
18
Mo
2
Ni
8
N
0.10
Chemical Composition (Phases/Compounds): 
Metallographic Preparation
Etchant: 
not used
Special Techniques: 
Imaging Details
Device: 
Scanning Electron Microscope
Mode: 
secondary electrons
Magnification: 
1000
Special Techniques: 
not used
Image Uploaded By
Name: 
Pankhuri Sinha
Email Id: 
pankhuri@nmlindia.org
Morphological Features
Criss-crossing pattern of intrusions and associated extrusions, which is typical of fatigue crack initiation.
References
S.K. Das, S. Tarafder and D.K. Bhattacharya, of National Metallurgical Laboratory(CSIR), India, received Best Micrography Award at the NMD-ATM 1997 of Indian Institute of Metals.
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