THE ANALYSIS OF FRACTURE SURFACES BY ELECTRON MICROSCOPY

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Abstract:

This paper reviews and illustrates the characteristic features of the following modes of fracture 1 Transgranular fracture which can take place either - by cleavage along crystallographic planes - or by the formation and coalescence of microvoids which leave concave depressions called dimples on both fracture surfaces, - or by the slow progression of a fatigue crack by a mixed ductile - cleavage mode of fracture. 2 Intergranular fracture which is either - brittle when there is a perfect separation of the grains along the grain boundaries, - or ductile when this separation is associated with the plastic formation of void along the grain boundaries.

Author(s):
Pelloux, Regis M.
Author Organization(s):
BOEING SCIENTIFIC RESEARCH LABS SEATTLE WA
Pagination:
0080

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
D1-82-0169-0R1
Monitor Series:
XD
 Subject Terms
Joint Capability Areas:
JCA_6.4.1_Secure Information Exchange; JCA_5_Command and Control; JCA_6_Net Centric; JCA_5.3_Planning; JCA_6.4_Information Assurance; JCA_1.2.5_Lessons Learned; JCA_6.1_Information Transport
Communities of Interest:
Air Platforms
Descriptor(s):
*FRACTURE(MECHANICS), *ELECTRON MICROSCOPY, *FRACTOGRAPHY, STRESSES, SIMULATION, METALS, SURFACES, PLASTIC PROPERTIES, DUCTILITY, GRAIN BOUNDARIES, GRAIN STRUCTURES(METALLURGY), FATIGUE(MECHANICS), BRITTLENESS, MICROSTRUCTURE, CORROSION, DEFORMATION, FILMS, ALLOYS
Field(s)/Group(s):
Fabrication Metallurgy, Test Facilities, Equipment and Methods, Mechanics
Report Date:
1963 Dec 01