Accession Number:

AD0755230

Title:

Deformation-Mechanism Maps and the Creep of Tungsten Lamp Filaments

Descriptive Note:

Interim technical rept.

Corporate Author:

HARVARD UNIV CAMBRIDGE MA DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s):

• Frost, H. J.
• Ashby, M. F.

Report Date:

1972-10-01

Pagination or Media Count:

38.0

Abstract:

A crystalline solid can deform plastically in a number of ways. Deformation mechanism diagrams can be constructed which display the fields of stress and temperature in which a given mechanism is dominant, and the strain rate it yields. This report describes some refinements in the computation of the diagrams, and illustrates their use by means of a case-study the creep of tungsten lamp filaments.

Descriptors:

• *DEFORMATION
• *CREEP
• COMPUTER PROGRAMS
• FILAMENTS
• DIFFUSION
• TUNGSTEN
• NICKEL
• GRAPHICS
• DISLOCATIONS

Subject Categories:

• Metallurgy and Metallography
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE