Accession Number : AD0866666

Title :   Simulation of Hot Forming Operations by Means of Torsion Testing.

Descriptive Note : Technical rept. 1 Jun 68-31 Aug 69,

Corporate Author : STANFORD UNIV CA DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Young, C. M. ; Sherby, O. D.

Report Date : FEB 1970

Pagination or Media Count : 79

Abstract : A torsion test apparatus is described which is capable of deforming samples at shear strain rates in the range 0.00001 to 10/secs and at temperatures up to about 1200C. Samples can be deformed to fixed strains at high strain rate and quenched in situ immediately upon termination of the test. The alloys Ti-6Al-4V, Udimet 700 and D-6ac were investigated for their torsional strength and ductility properties at various high strain rates and high temperatures; the structural changes accompanying hot deformation were also evaluated. A comparison was made of the structures obtained by extrusion with the structures obtained by torsional deformation at approximately comparable strain, strain rate and temperatures. (Author)

Descriptors :   (*REFRACTORY METAL ALLOYS, EXTRUSION), (*HOT WORKING, STRESSES), SIMULATION, DUCTILITY, TORSION, MICROSTRUCTURE, PLASTIC PROPERTIES, STRESSES, STRAIN(MECHANICS), TEST METHODS.

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE