Accession Number : AD0433286


Title :   INFLUENCE OF ENVIRONMENT ON CRACK PROPAGATION AND DELAYED FAILURES IN HIGH-STRENGTH STEELS.


Descriptive Note : Rept. for Dec 62-Nov 63,


Corporate Author : TRW INC CLEVELAND OHIO


Personal Author(s) : Hanna,G L ; Steigerwald,E A


Report Date : Jan 1964


Pagination or Media Count : 52


Abstract : Environmentally-induced crack propagation was studied in several classes of high-strength steels with particular emphasis on the influence of aqueous media. Low alloy martensitic steels, 4340 and 300M, were very susceptible to delayed failure in a water or moist air environment while an H-11 die steel was only moderately embrittled. Under the particular test conditions employed the precipitation-hardening and maraging steels were relatively unaffected by aqueous environments. (Author)


Descriptors :   *STEEL , *FRACTURE(MECHANICS) , FAILURE(MECHANICS) , PROPAGATION , HYDROGEN EMBRITTLEMENT , STRESSES , CORROSION , STAINLESS STEEL , TOOL STEEL , ENVIRONMENTAL TESTS , WATER VAPOR , AIR , ARGON , OXYGEN , VOLTAGE , TEMPERATURE , FRACTOGRAPHY , WATER , HEAT TREATMENT , TENSILE PROPERTIES , CHEMICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE