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Title: DYNAMIC DEFORMATION AND DAMAGE IN CAST GAMMA-TiAl DURING TYALOR CYLINDER IMPACT: EXPERIMENTS AND MODEL VALIDATION

The dynamic deformation, damage evolution, and cracking in two cast gamma titanium aluminide alloys has been investigated experimentally and theoretically. The purpose of this study was to create and validate experimentally a finite-element model of the high speed impact of a cylindrical {gamma}-TiAl projectile into a steel block in order to evaluate the accuracy of {gamma} constitutive properties used in FEA simulations. In this paper the damage evolution, cracking, and validation of the constitutive response of Ti-48-2-2 and WMS cast gamma alloys is discussed. The utility of validating the high-rate impact behavior of engineering aerospace materials using Taylor cylinder impact testing is detailed.
Authors:
;
Publication Date:
OSTI Identifier:
775575
Report Number(s):
LA-UR-01-1276
TRN: AH200121%%96
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Mar 2001
Research Org:
Los Alamos National Lab., NM (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACCURACY; ALLOYS; DEFORMATION; PROJECTILES; STEELS; TESTING; TITANIUM; VALIDATION