Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Deformation and Ductile Fractures of Metals in Torsion and Tension

Report Number: AFOSR-2276
Author(s): Polakowski, N. H. and S. Mostovoy
Corporate Author: Illinois Inst. of Tech. Dept. of Metallurgical Engineering
Date of Publication: 1962-02
Pages: 37
Contract: AF 49(638)308

Abstract:
The various types of shear fractures are classified and It is suggested that the cup-and-cone type occurs when an axisymmetrical stress gradient or a likewise orientation exists. Attention is also drawn to the constancy of the fracture stress within a broad range of initial prestrain by methods other than tension. Transient deformation instability in torsion is studied. The increase of ductility of work hardened FCC metals at low temperature is discussed and it is concluded that this spectacular change is caused by the increase of the strain-hardening exponent. The Swift fracture in tension is shown to often deviate from the plane of the torsional prestrain helix. It was possible to localize a Swift fracture to a single shear band which resulted in an "end mill" type fracture which progressed violently without penetrating, however, into the metal outside the band.

This citation is provided as a resource for researchers, but Contrails cannot provide a full-image download

U.S. government employees, Military/Department of Defense employees, and U.S. government contractors and sub-contractors may be eligible to register with the Defense Technical Information Center (DTIC), where this report and others like it may be available

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
This report is not publicly available via DTIC

Via National Technical Information Service:
This report is unlikely to be available in the National Technical Reports Library

Indications of Public Availability
No digitial image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement
Tags: