STRAIN AGING AND DELAYED FAILURE IN HIGH-STRENGTH STEELS

reportActive / Technical Report | Accession Number: AD0294396 | Open PDF

Abstract:

Spontaneous strain aging which occurs during tensile testing was examined for several high-strength steels. The results of smooth and notch tensile tests indicated that significant strain aging effects occurred in most high-strength steels in the 300 F to 800 F temperature range and this behavior was analogous to blue brittleness in mild steels. Constant load, stress rupture tests were conducted on the steels to determine the possible relationship between strain-aging embrittlement and delayed failure. Or2y the 300 M steel tested at 400 F exhibited an appreciable degree of delayed failure. This embrittlement, was extremely sensitive to test environment and was elimiriated when tests were conducted in argon. Although strain aging was not a sufficient condition to initiate delayed failure, it appeared to increase the severity of the environmental effects in the particular range where sufficient interstitial mobility existed.

Author(s):
Steigerwald, E. A. ; Hanna, G. L.
Author Organization(s):
TRW INC CLEVELAND OH
Supplementary Note:
DOI: 10.21236/AD0294396
Pagination:
0057

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ASD-TDR-62-968
Contract/Grant Number(s):
AF 33(657)-7512
Task Number(s):
73521
Project Number(s):
7351
Monitor Series:
TDR-62-968, ASD
 Subject Terms
Joint Capability Areas:
JCA_1_Force Support; JCA_1.3_Human Capital Management; JCA_1.3.2_Personnel Management; JCA_5_Command and Control; JCA_5.3_Planning; JCA_3.2_Engagement; JCA_3_Force Application; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_3.2.1_Kinetic Means
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*STRESS TESTING, *STAINLESS STEEL, TEMPERATURE, MECHANICAL PROPERTIES, DEFORMATION, FATIGUE(MECHANICS), CONTROLLED ATMOSPHERES, FAILURE(MECHANICS), HIGH STRENGTH ALLOYS, TENSILE PROPERTIES, AGING(MATERIALS), REACTION KINETICS
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
*STEEL 1050
Report Date:
1962 Nov 01