Accession Number : ADA181324
Title : Micromechanisms of Fracture and Crack Arrest in Two High Strength Steels.
Descriptive Note : Research and development rept. Sep 84-Oct 85,
Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD SHIP MATERIALS ENGINEERING DEPT
Personal Author(s) : Gudas,J P
PDF Url : ADA181324
Report Date : Feb 1987
Pagination or Media Count : 322
Abstract : An investigation of fracture properties of a quenched and tempered martensitic steel and copper precipitation on strengthened low carbon ferritic steel possessing similar yield strengths was conducted. The objective included evaluation of fracture toughness, and explanation of metallurgical mechanisms causing changes in relative fracture performance. A crack arrest toughness test procedure was developed to obtain full plate thickness, lower bound measurements of dynamic fracture toughness at various test temperatures. Micromechanisms of fracture processes were described using metallurgical analysis techniques. Keywords: crack arrest, crack initiation, cleavage fracture, and structural steel.
Descriptors : *FRACTURE(MECHANICS), *ARRESTING(PROCESS), *CRACK PROPAGATION, *STEEL, CLEAVAGE, COPPER, CRACKING(FRACTURING), DYNAMICS, HIGH STRENGTH ALLOYS, MARTENSITE, MEASUREMENT, METALLURGY, PLATES, PRECIPITATION, QUENCHING, STRUCTURAL STEEL, TEMPERATURE, THICKNESS, TOUGHNESS, YIELD STRENGTH, CARBIDES, LOW TEMPERATURE, MECHANICAL PROPERTIES, PHOTOMICROGRAPHY, HIGH STRENGTH ALLOYS, FERRITES
Subject Categories : Properties of Metals and Alloys
Distribution Statement : APPROVED FOR PUBLIC RELEASE