Characterizing Fractures by Electron Fractography, Part 12, Illustrated Glossary, Section 1: Quasi-Cleavage

Abstract

This report is one of a series intended to illustrate and explain the terminology used in describing the features in high magnification fractographs. Quasi-cleavage is one of several fracture modes possible in the mechanical rupturing of quenched and tempered (martensitic) steels. The high magnification surface topography in this fracture mode resembles true cleavage in that the fracture facets are relatively flat with markings which often, though weakly, resemble river patterns in true crystallographic cleavage. In addition to the steps which produce these markings, there are also "tongues" (cleavage on secondary planes) which strongly resemble true cleavage. But in addition there are, in quasi-cleavage, ridges produced by plastic deformation and rupture of thin webs of metal between two growing submerged crack fronts; these markings do not resemble true cleavage.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1963
Accession Number
AD0416457

Entities

People

  • A. J. Edwards
  • B. F. Brown
  • C. D. Beachem

Organizations

  • United States Naval Research Laboratory

Tags

Readers

  • Business Analytics
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Microelectronics