Accession Number:

AD0628979

Title:

EFFECTS OF TEMPERING ABOVE THE LOWER CRITICAL TEMPERATURE A SUB C1 ON THE PROPERTIES OF AN HY-80 STEEL

Descriptive Note:

Progress rept. no. 6

Corporate Author:

DAVID TAYLOR MODEL BASIN WASHINGTON DCSTRUCTURAL MECHANICS LAB

Personal Author(s):

• Willner, Abner R.
• Salive, Marcel L.

Report Date:

1966-01-01

Pagination or Media Count:

30.0

Abstract:

The effects of tempering above the critical transformation temperature on the microstructure, notch-toughness and mechanical properties of HY-80 steel was investigated. The formation of alpha ferrite and prime martensite after tempering above the lower critical temperature and quenching will result in mechanical properties that fall below the requirements of the HY- 80 specification. Retempering to achieve minimum yield strengths may result in nonuniform yield strength distribution. The possibility of underbead cracking due to alloy segregation is also discussed.

Descriptors:

• *STEEL
• MECHANICAL PROPERTIES
• MICROSTRUCTURE
• TENSILE PROPERTIES
• FRACTURE(MECHANICS)
• QUENCHING
• WELDS
• TRANSITION TEMPERATURE
• METAL PLATES
• TEMPERING
• TRANSFORMATIONS
• METALLOGRAPHY
• NOTCH TOUGHNESS

Subject Categories:

• Properties of Metals and Alloys
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE