Accession Number:

ADA155530

Title:

Metallurgical Origins of Fracture Toughness and Microstructure and Fracture Toughness of an HSLA (High-Strength/Low-Alloy) Steel.

Descriptive Note:

Final rept. 15 Aug 78-14 Aug 81, 1 Jan 82-31 Dec 84,

Corporate Author:

BATTELLE COLUMBUS LABS OH

Report Date:

1985-05-31

Pagination or Media Count:

11.0

Abstract:

The report discusses effects of composition and heat treatment on the fracture behavior of a group of steels based on ASTM A712A. Very low transition temperatures were observed in a number of cases. However, adverse effects of Cu on the K sub Ic value for cleavage and on the sharpness of the ductilebrittle transition are noted. At ambient temperatures, overaged Cu particles are beneficial for ductile fracture resistance. A new experimental method of evaluating the relative contributions of opening and shear to ductile crack growth was developed, along with a superdislocation model of the process. Keywords Steel, high-strengthlow alloy Microstructural effects Compositional effects Fracture statistics Constitutive Modelling.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE