DTIC AD0603698: THE TENSILE DUCTILITY TRANSITION IN pdf

DTIC AD0603698: THE TENSILE DUCTILITY TRANSITION IN_bookcover

DTIC AD0603698: THE TENSILE DUCTILITY TRANSITION IN

More Book Details

Description of the Book:

An investigation was carried out to determine the nature of the tensile ductility transition in recrystallized molybdenum strip of three interstitialal contents. For a fine grain size, the tensile ductility transition temperature (T sub d) and the brittleness transition temperature (T sub b) were found to approximately coincide; whereas with increase in grain size T sub d is raised and T sub b is lowered. The occurrence of a minimum in the fracture stress (sigma sub F) at T sub d appears to be associated with the temperature dependence of the necking stress (Sigma sub n). Prestraining above T sub d, was found to result in as much as a 20% increase in (sigma sub F) as determined at temperature below T sub d. In general, the mode of fracture initiation was found to be intergranular at T sub d or below and cleavage above T sub d.

For a test temperature above as well as below T sub d, crack initiation appears to be the controlling step in fracture. Considering (sigma sub F) as a flow stress corresponding to the fracture strain (epsilon sub F), the variation of (sigma sub F) with temperature above T sub d was predicted within about 15%. Based on a modification of the Cottrell relation for crack initiation, the increase in (sigma sub F) above T sub d is associated with a decrease in both the flow locking parameter (k sub f) and the effective grain size

  • Creator/s: Defense Technical Information Center
  • Date: 7/1/1964
  • Year: 1964
  • Book Topics/Themes: DTIC Archive, , MANLABS INC CAMBRIDGE MA, *FRACTURE(MECHANICS), STRESSES, TENSILE PROPERTIES, MOLYBDENUM, BRITTLENESS, MATHEMATICAL ANALYSIS, CREEP, GRAIN STRUCTURES(METALLURGY), METALLOGRAPHY, RECRYSTALLIZATION, DUCTILITY, SHEETS, TRANSITION TEMPERATURE, FRACTOGRAPHY, STRAIN(MECHANICS), IMPURITIES

An excerpt captured from the PDF book

DTIC AD0603698: THE TENSILE DUCTILITY TRANSITION IN_book-excerpt

Report Broken Link

File Copyright Claim

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Categories

You might be also interested in these Books

Related Posts
PDF Viewer

الرجاء الانتظار بينما يتم تحميل الـ PDF…
HTML Popup Example