Anisotropic yield locus evolution during cold pilgering of titanium Alloy Tubing

Richard W. Davies, Mohammad A. Khaleel, William C. Kinsel, Hussein M. Zbib

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The cold pilger metal forming technique is known to produce round titanium alloy tubing with mechanical properties that may be significantly anisotropic. These mechanical properties are of interest to both the manufacturers and consumers for defining initial manufacturing limitations and defining the final product design limitations. This study focuses on experimentally characterizing the yield locus development of Ti-3Al-2.5V seamless tubing during cold pilgering and a subsequent thermal stress relieving process. The materials are experimentally characterized using a biaxial testing apparatus, which subjects the specimen tubes to combined axial load and internal pressure. The Hill yield criterion is subsequently fit to the experimental results producing continuous yield loci. Each specimen is also experimentally characterized using X-ray diffraction to gain insight into the material textures that accompany the macroscopic properties. All work is focused on one particular pilger pass at two different production rates. A second experimented variable iv introduced to the study by using two significantly different input materials, as characterized by X-ray diffraction. This study also investigates the nature of the plastic deformation of the tubing developed during cold pilgering via finite element analysis and discusses the relationship between the finite element predictions and the mechanical anisotropy.

Original languageEnglish
Pages (from-to)125-134
Number of pages10
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume124
Issue number2
DOIs
Publication statusPublished - 1 Apr 2002
Externally publishedYes

Fingerprint

titanium alloys
Tubing
loci
Titanium alloys
stress relieving
forming techniques
mechanical properties
axial loads
X ray diffraction
metal forming
Mechanical properties
Stress relief
internal pressure
Axial loads
Metal forming
thermal stresses
Product design
diffraction
Thermal stress
plastic deformation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Materials Science(all)

Cite this

Anisotropic yield locus evolution during cold pilgering of titanium Alloy Tubing. / Davies, Richard W.; Khaleel, Mohammad A.; Kinsel, William C.; Zbib, Hussein M.

In: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 124, No. 2, 01.04.2002, p. 125-134.

Research output: Contribution to journalArticle

Davies, Richard W. ; Khaleel, Mohammad A. ; Kinsel, William C. ; Zbib, Hussein M. / Anisotropic yield locus evolution during cold pilgering of titanium Alloy Tubing. In: Journal of Engineering Materials and Technology, Transactions of the ASME. 2002 ; Vol. 124, No. 2. pp. 125-134.
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