Accession Number : AD0786378

Title :   Solid Cadmium Embrittlement of 4340 Steel.

Descriptive Note : Phase rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT

Personal Author(s) : Hoffner,James A.

Report Date : 27 JUN 1974

Pagination or Media Count : 17

Abstract : High strength AISI 4340 steel heat treated to 210-220 ksi UTS was observed to suffer degraded ductility when exposed to solid cadmium. The critical criteria include effective tensile strain parallel to the Cd/steel interface and intimate Cd/steel contact (oxide free). At moderate temperatures (300 deg F) exposure for extended periods (100 hrs) is required to produce the embrittlement effect. The most severe of the test conditions employed in this study produced evidence that intergranular slow growth cracking could occur, resulting in deteriorated load bearing capacity of the material. (Author)

Descriptors :   *Steel, *Embrittlement, *Cadmium, *Metal coatings, Fracture(Mechanics), Crack propagation, Electroplating, Temperature

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE