CRACK INITIATION IN METALLIC MATERIALS

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Abstract:

The theoretical analysis of hole and notch stress fields was continued. It is shown how the maximum stress of an elliptical crack is orientation dependent. To study the effects of surface condition on the fracture strength of tungsten, bend tests in three point loading were conducted on machined specimens from which various amounts of surface material were removed by electropolishing. As-received material showed a marked improvement with increased surface removal while recrystallized material showed a loss in strength for surface removal up to 0.010 in.

Author(s):
Schroder, K. ; Packman, P. ; Weiss, V.
Author Organization(s):
SYRACUSE UNIV NY METALLURGICAL RESEARCH LABS
Descriptive Note:
Quarterly progress rept. no. 3
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Availability: Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MET-E-1040-6308Q3
Contract/Grant Number(s):
N600(19)-59514
Monitor Series:
NAVWEPS
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_1_Force Support; JCA_3.2.1_Kinetic Means; JCA_4.6_Engineering
Communities of Interest:
Air Platforms
Descriptor(s):
*METALS, *TUNGSTEN, *TITANIUM ALLOYS, STRESSES, TEMPERATURE, EXPERIMENTAL DATA, MICROSTRUCTURE, MACHINING, HIGH TEMPERATURE, THEORY, HEAT TREATMENT, SURFACES, BRITTLENESS, TRANSITION TEMPERATURE, SURFACE PROPERTIES, CRYSTAL DEFECTS, ALUMINUM, CREEP, DUCTILITY, RECRYSTALLIZATION, ELECTROLYTIC POLISHING, VANADIUM ALLOYS
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
TITANIUM ALLOY 2 5AL 6V
Report Date:
1963 Aug 01