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INTERGRANULAR CREEP FRACTURE BEHAVIOUR OF SS-304LN STEEL

This microstructure posted 29 March, 2010 - 15:24 by Samirbose

intergranular creep fracture face in SS-304LN steel

grain boundary creep cavities in gage portion of a crept SS-304LN steel
Material (Name/Designation/Grade): 
SS-304LN
Material Condition (Heat treatment/Service history/Source): 
THICK WALLED PIPE, SOLUTION ANNEALED AT 980 C FOR 8 HOURS AND FURNACE COOLED
Chemical Composition: 
C
.03
Mn
1.78
Si
0.65
S
0.02
P
0.034
N
0.08
Ni
8.17
Cr
18.73
Cu
0.29
Mo
0.26
Fe
BALANCE
Chemical Composition (Phases/Compounds): 
Metallographic Preparation
Etchant: 
AQUA REGIA
Special Techniques: 
SWABING PROCESS
Imaging Details
Device: 
SEM
Mode: 
SECONDARY BACKSCATTERED ELECTRONS
Magnification: 
Special Techniques: 
NOT USED
Image Uploaded By
Name: 
SAMIR BOSE
Email Id: 
benu79@rediffmail.com
Morphological Features
Fig 1:FRACTOGRAPH OF A FRACTURE FACE OF A CREPT SS-304LN STEEL , TESTED AT 225MPa AND 600 C WITH A LIFE -7153 HOURS. Fig 2:DISTRIBUTION OF GRAIN BOUNDARY CREEP CAVITIES OF A CREPT SS304-LN STEEL. TEST CONDITION : 225MPa/600 C/7153h.
References
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