Accession Number:

ADA066814

Title:

FRACTURE TOUGHNESS AND STRESS CORROSION CHARACTERISTICS OF ULTRAHIGH- STRENGTH 4340 STEEL - SUMMARY REVIEW

Descriptive Note:

Final rept.

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Personal Author(s):

• WONG, Anthony K.
• Levy, Milton
• Czyrklis, Walter F.

Report Date:

1979-02-01

Pagination or Media Count:

22.0

Abstract:

A review was made of the fracture toughness K sub Ic and stress corrosion K sub Iscc characteristics of 4340 steel within the 200 to 250 ksi yield strength range. This literature review was conducted in support of a fracture mechanics and environmental investigation of 4340 steel for the control section housing of the Copperhead CLGP Cannon-Launched Guided Projectile weapon system. Factors affecting toughness and corrosion cracking characteristics are considered. Also included are data pertaining to the damaging effects of humidity. Fracture toughness and stress corrosion cracking resistance of 4340 steel are usually higher in the alloys possessing lower yield strengths.

Descriptors:

• *FRACTURE(MECHANICS)
• *STEEL
• *HIGH STRENGTH ALLOYS
• PLANE GEOMETRY
• GUIDED PROJECTILES
• STRESS CORROSION
• YIELD STRENGTH
• STORAGE
• HUMIDITY
• STRAIN(MECHANICS)
• TOUGHNESS
• TEMPERATURE
• CHEMICAL COMPOSITION

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE