Accession Number:

AD0605672

Title:

INVESTIGATION OF THE EFFECTS OF STRESS CORROSION ON HIGH-STRENGTH STEEL ALLOYS

Descriptive Note:

Rept. for Jun 1962-Dec 1963

Corporate Author:

BOEING CO RENTON WA

Report Date:

1964-02-01

Pagination or Media Count:

128.0

Abstract:

The stress corrosion susceptibility of several high strength steels has been evaluated by alternate-immersion laboratory testing in a 3.5-percent sodium chloride solution. The steels evaluated were the stainless steels AFC 77, AM 350, AM 355, and 17-4PH the low alloy steels D6AC, 4335M, 4340, H-11, 4330M, and HY-Tuf and the high nickel steels 18Ni-9Co-5Mo, 18Ni-7Co-5Mo, and 9Ni-4Co. The variables investigated were product form, grain direction, tensile strength level, stress level, cold working, ausforming, welding, and protective coatings. Detailed results relating stress corrosion susceptibility to the variables and alloys studied are included. Notch tensile and fatigue cracked fracture toughness testing was carried out for correlation with stress corrosion susceptibility. Optical microscopy, electron microscopy, and X-ray diffraction studies were made to supplement the mechanical property and stress corrosion testing. A literature survey of related stress corrosion test data is included.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE