Fracture Extension Resistance (R-Curve) Characteristics for Three High-Strength Steels

reportActive / Technical Report | Accession Number: AD0737192 | Open PDF

Abstract:

The fracture extension resistance curve R curve, which delineates the increasing rate of plastic work needed to cause crack propagation in nonbrittle metals, is determined by using Dynamic Tear DT test procedures. The resistance parameter is the slope of the R curve. The effect of specimen thickness on the R-curve slope was investigated for three high-strength steels of high, intermediate, and low resistance to ductile fracture. R curves were determined for each steel in the full thickness 1 in. and for thicknesses of 0.625 and 0.325 in.

Author(s):
Judy, Ralph W., Jr. ; Goode, Robert J.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Descriptive Note:
Final rept.
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):
NRL-7361
Project Number(s):
NRL-M01-25, RR022-01-46-5432
Monitor Series:
NRL
 Subject Terms
Joint Capability Areas:
JCA_1_Force Support
Communities of Interest:
Air Platforms
Descriptor(s):
*STEEL, *FRACTURE(MECHANICS), TEST METHODS, PLASTIC PROPERTIES, DUCTILITY
Field(s)/Group(s):
Metallurgy and Metallography
Keyword(s):
*HIGH STRENGTH ALLOYS, *STEEL
Report Date:
1971 Dec 30