Dynamic deformation and damage in cast gamma-tial during tyalor cylinder impact: experiments and model validation.

Gray, G.

Technical Information Center Oak Ridge Tennessee

关键词: Alloys;    Deformation;    Damage;    Finite element method;    Accuracy;   

RP-ID  :  DE2001775575

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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.